Duel Outboard v Single Outboard
Submitted by terboz123 on Sun, 2015-03-08 03:25
Hey lads...
whats the pros and negatives about duel outboards v singles....about to do my own google search but would like peoples opinions too!
Brett
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Auslobster
Posts: 1901
Date Joined: 03/05/08
Twins are good...
...if you're looking at older, high-hour two-strokes. Obvious peace-of-mind, can run on one small motor in speed-restricted areas or if trolling, and when doing repairs/servicing you can trouble-shoot by swapping parts.
Newer motors, no real benefit. More reliability and the advances in both 4-stroke and 2-stroke technology have pretty much eliminated the rough and smoky experience at low speed. I would also guess that the service cost on smaller twins will be higher than one big motor.
Obviously twins would be mandatory on certain hull types...ie cat.
Rob H
Posts: 5806
Date Joined: 18/01/12
Only really depends on if
Only really depends on if you operate in areas where a breakdown would be critical, then have twins or an auxiliary to get you somewhere safe at least.
As an engineer i can assure you that ANY mechanical item can breakdown (or "fail to proceed" as with Rolls Royce).
It only hinges on whether there will be 400 boats around laughing at you or all on your lonesome shitting bricks cos you cant change a light hulb!
I have twins and they certainly give me peace of mind at the islands
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
damo6230
Posts: 2029
Date Joined: 07/06/08
ha ha
Two engines with shite fuel = two engines not going
Dont matter if how many people are laughing because they should be helping 'as shit happens', according to your philosophy.
I can swing some tools but I cant jump over board as I am then croc bait
I'd prefer preventative maintenance, my VHF and Sat phone
Expected response from an engineer.....
Rob H
Posts: 5806
Date Joined: 18/01/12
Im sure you didnt intend that
Im sure you didnt intend that to sound a bit stroppy mate but
Shite fuel and you are unlikely to make it far past the entrance to the marina so fairly unlikely to be an issue
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
Vinesh87
Posts: 2751
Date Joined: 02/04/11
Really ?I'm sure if it was
Really ?
I'm sure if it was all bad you would know pretty quick but:
If you had 200L and then topped it with another 200L of bad fuel it would take a few 100k's to see the effects wouldnt it ?
Or if you have a Main tank and a sub tank ( like i will be doing ) means when ya get to the sub tank your in trouble a long way from home !!
Bad fuels gonna get ya with single or twins i think !
Deleted
Posts: 6265
Date Joined: 26/04/14
just curious why would you
just curious why would you bother with a sub tank, seems to be another place for dirty fuel to sit.
Vinesh87
Posts: 2751
Date Joined: 02/04/11
Because ya can't fit 800l in
Because ya can't fit 800l in one tank haha
Deleted
Posts: 6265
Date Joined: 26/04/14
cant make a custom tank?
cant make a custom tank? seems like your searching for the ultimate boat
so there would be mods that are not the norm or what some would call impossible. just seems a little odd to have a emergency tank.
Vinesh87
Posts: 2751
Date Joined: 02/04/11
These tanks will already be
These tanks will already be custom. In the size boat i am looking at you wont get much bigger tank between the stringers and beams and stuff hence the need for 2 tanks. Alternatly a tank per motor. Will see what i can do if i can ever decide on a hull haha
Deleted
Posts: 6265
Date Joined: 26/04/14
oh yeah ok...... maybe. so
oh yeah ok...... maybe.
so if i was to plan the greatest boat ever and a long ranger i would say dual motors and a long range single tank 500ltr. just me of course
Rob H
Posts: 5806
Date Joined: 18/01/12
Gilly, my problem with large
Gilly, my problem with large single tanks is that the baffles have to be set up very carefully so you can use the last 50 litres on a rough day, same goes with the gauge.
50 litres in a 500 litre tank doesnt need to slosh much to start surging and when you hear that first stutter as you are (inevitably) entering through the reef/entrance/swell, your ringhole gets water tight.
Of course you shouldnt be using it, but if you CANT use it, may as well be a 450 litre tank!
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
Deleted
Posts: 6265
Date Joined: 26/04/14
damo6230
Posts: 2029
Date Joined: 07/06/08
not really....
Motor serviced and picked boat up Monday.
New filters oil etc etc.
Check filter oil etc before I left Sat morning
When I'm cruising 55km to get to the creek that takes time,
Up the creek and the motor stops.
Shite fuel as the Filter says so.
One can be far from 'home' when shit happens.
Always good to have a Plan B and one/two motors can still give you hiccups.
Yes we were fine, half an hour leaning over engien in croc infested waters I cleaned everthing up and off we went.
Shit happens
Rob H
Posts: 5806
Date Joined: 18/01/12
out of curiousity, if you
out of curiousity, if you covered 55km before the new filters blocked and then changed them and I assume you then travelled 55km home on the same fuel and they didnt block, where did the contamination come from?
Im not sure what problem you had with my post above but yes outboards are way more reliable nowadays and yes it is possible to have both engines fail for some reasons (its happened on $100M twin engine aircraft also) but mechanical failures are also possible-I have seen 2 new Caterpillars, an MTU and a GM fail catestrophically in the first 50 hrs.
Always have a Plan B, for sure but if Plan B is to hope there is a random stranger in the remote area then some would prefer a second outboard, whether an auxiliary or a twin setup.
For me, my boat happened to have twins when I bought it and I like it as I travel with kids and no other boats.
Would I set up a new boat with twins? not necessarily but I would at least have an auxiliary in a remote area to get back to a jetty/shelter such as at the Abrolhos.
To paddle a 3T boat even 100M upwind would be a big call.
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
Vinesh87
Posts: 2751
Date Joined: 02/04/11
Out of interest how big
Out of interest how big alternate motor would you consider to push 3t upwind? 25hp, 40hp ?
Rob H
Posts: 5806
Date Joined: 18/01/12
I found on my previous 5.8
I found on my previous 5.8 Trailcraft that the old 9.8 Merc with chewed up prop would get it to maybe 20 times as fast as I could paddle it and for alot longer
I was suprised that at a guess maybe 5 knots?
I see above that not everybody agrees with my thinking but a breakdown 100 meters from a jetty at the islands with a head wind and 5 kids aboard might as well be 100 miles.
A cheap 25hp 2stroke will do way more than nothing, or having said that if you carry a small inflatable/5hp in remote areas like Paul and others do then you at least have half a plan B.
Difference between anchored 100 meters from shelter and tied up to a jetty/lagoon awaiting assistance.
Doesnt even have to be a breakdown.
CRUNCH!-where did that fkn bombie come from
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
damo6230
Posts: 2029
Date Joined: 07/06/08
Poor comment
'It only hinges on whether there will be 400 boats around laughing at you or all on your lonesome shitting bricks cos you cant change a light hulb!'
You can be the best mechanic and have the best of everything and do the best preventative maintencance etc but things still go wrong.
I would think it more sensible and enlightning to educate people and as for 400 people sitting around laughing then again that is poor attitude if you sit around laughing when something happens.
I travelled 150 km Sat which is average for me. The big problem we get here is shite fuel. Best thing to do is be prepared as it happens all the time. Suzuki's are designed to shut down into limp mode as know when they smell water in the fuel and it only has to smell it.
Apart from a slight stop and clean it was a hassle free day and Barra in the esky.
It's not a strange comment as being prepared goes a long way to being safe.
D_d_001
Posts: 1522
Date Joined: 09/03/13
I only thought it was a
I only thought it was a strange comment because I didn't realise we were talking about (a lack of) preventative maintenance and didn't (still don't) know what "expected response from an engineer...." meant.
I certainly agree that "being prepared goes a long way" and
"You can be the best mechanic and have the best of everything and do the best preventative maintencance etc but things still go wrong."
so still for the life of me cant understand why having a spare motor is not safer.
sarcasm0
Posts: 1396
Date Joined: 25/06/09
Not wanting to stir the pot
It seems you are all agreeing that 'shit happens', best to be prepared with preventative maintenance but Damo6230 yours are the only comments that read like you are self righteous and somewhat smarter than everyone else. What is with the attitude?
If your issue is dirty fuel all the time, I would have thought a water separating fuel filter or two pre engine regularly checked, drained and spares on board, some sort of fuel stabiliser would also be mandatory if it was so frequent.
All in all a good thread with good comments, just tone it down a bit, no need for the attitude.
Bryan
Rob H
Posts: 5806
Date Joined: 18/01/12
sometimes people just seem to
sometimes people just seem to be looking for a reason to be offended, who knows why.
Damo if your fuel is that bad use a Mr Funnel to fill up with.
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
damo6230
Posts: 2029
Date Joined: 07/06/08
Bryan
My comments are not self righteous or that I'm smarter. My attitude is fine.
If you read his post in one sentance he says all things break down but in the next he says '400 people will be laughing at you'. I read that as a contrdiction in providing advice on the benefits of two motors over one because just like one motor can break down so can two.
Um dirty fuel is an issue living in remote locations. I have a fuel filter if you bother to read the post you will see that I cleand it and then kept going. Bad fuel = be prepared.
I couldn't care less if 4000 people laugh at me if I break down cause I only have one motor. I'n my case it's best to be prepared and have exit options.
If you want two motors then knock youself out.
Rob H
Posts: 5806
Date Joined: 18/01/12
stop crying over nothing mate
stop crying over nothing mate and get over it.
If your looking to be offended you've succeeded.
It was a subtle bit of humour asking whether he is boating metro or remote but you missed it
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
damo6230
Posts: 2029
Date Joined: 07/06/08
Not crying and never was
Not offended, never was.
I've spent my entire adult working life in remote locations.
I've helped countless people who break down (and vice versa).
People can help themselves and others if they are prepared. Simple advice.
I'll remember to turn on the 'subtle humour' button next time
sarcasm0
Posts: 1396
Date Joined: 25/06/09
ok.
I dont see how things breaking down and people being assholes by laughing at someone in distress is a contradiction... I know you live in a remote area with shit fuel. If you bothered to read my post I said water separating fuel filter, tell me just how you clean one out? After working in marine parts and service for a few years I am really keen to know how as I have never heard of it(I dont mean draining the bowl). If you are talking about a bowl filter on the motor then that is different, but my comments relate to putting in extra filtration before the motor for added protection. You might also be able to upgrade to finer filters for more protection.
If your filters blocked again and were unservicable somewhere further in your trip and you were unable to get it running, what was your 'exit option' for rescue? Someone else come get you? Would they be happy you had a fuel issue, sorted it out and then went further from safety to have it completely shit itself? Rather than RTB after the first issue? You do live in a remote area!
For the record I thought Rob's suggestion of filtering the fuel while you were filling to also be another good preventative measure. Nor do you mention using a fuel stabiliser for more protection when you know you have dirty/bad fuel. I also know I wont be offering any more advice on the subject.
damo6230
Posts: 2029
Date Joined: 07/06/08
More advice
Bryan,
I did initially see that as a contradiction. I know plenty of people who wont go remote due to being scared of breakdown / recue then the ridicule. Rob said it was humour and I dont disagree now.
I'd like to know how you know when your going to get shite fuel? Like you I regularly check my engine before I head out and undertake all the little maintenance procedures sound skippers do before every trip. I then drive to the Servo. I then fuel up and drive to the ramp. Regardless of the road distance cause the Wyndham ramp is 110km from here or 5km from the Wyndham Servo I cant tell easily if the fuel is shit even in the water seperator cause it aint had time to draw through the sytem as the engine hasn't started. Dont forget I have already serviced the filter before filling up with fuel. So off you head out into the 'wonder'. So if there is any issue with the fuel (it doesn't happen often) buy the time it hits I am well on my way and can be far from the ramp and any other boat.
Now bad fuel is not the only problem. The Kimberley suffers very high humidity and humidity = water and it gets into everything, even boat fuel Bryan.
Now I must admit I piss myself laughing when I read about ramp rage but up here it's a long way between boats. In fact a busy ramp can be 15 cars (not usual) between 100's of square kilometers (remote remember). Hence why I carry so many spares and I will get to that later so keep reading.
So I dont need to re-read my posts because I never said I 'go further away from the breakdown point' to shit itself again. In fact I do the contrary every time! So here's some fact to counter your ignorance because you are ignorant if you weren't in my boat last trip. I know your not telepathic Bryan.
Up a creek in the Channel country in 2m of water. Motor cuts out. I know the tide is dropping and today we have a 6m tide. So do the math Bryan and work out how much time I have at said location before the tide drops. Now tell me the draft on the Seas Rescue boat? Yes I know that but I aint telling you. Now work out how long I have to wait if my boat is high and dry not only for the water to return (dont forget I'm in the Kimberley Bryan) but for the Rescue boat to get in and then have time to help at said location. But alas I'm OK as I throw the Minn Kota remote to my deckie and advise him to steam out into the Channel. There we have plenty of water and more options. More options like my mate finding me a lot easier as he will at some time pass through that channel on his way home, rather than searching up every creek. Oh no, what about radio communication I hear you say. Well my VHF is brand new. Remember that I just had the boat serviced and because I was losing communication with Sea Rescue last trip and, well communication is the life blood of the Kimberlely, so said old faulty radio was swapped for a brand new one. So while my brand new radio was working my mates was not. Now he could have a faulty radio or it simply could be that the signals aren't reaching each others radio which does happen in said environments. Dont forget Bryan that when we logged on in the morning to Sea Rescue the Police answered and advised the Rescue Captain is in Darwin on holiday so the Police were manning the radio's. Thank goodness for that but again if there is a problem and resuce is required than it will take longer than normal because the Captain aint available and other less experienced crew come get. Just another consideration in the rescue equation. So know it's about time Bryan that you realise that I'm heading home; thats back towards the ramp Bryan, not away!, albeit slowly under Minn Kota power (and yes it's to far for the batteries to power 60km to the ramp) all the while while I have removed the seperator and cleaned it out and inspected it. Why you ask? Because from the way the motor cut out I'm pretty confident it's water in the fuel which I explained in previous posts as a Suzuki's preventaive measure to save the motor is to cut out/limp mode. So hence straight to the seperator at the transom. Cleaned / filled back up and screwed back on. Now Bryan where did I get that spare fuel to fill the filter....?Then next I'm leaning over the motor pulling the feul filter off. Now I know you know thats tricky Bryan becuase you know exaclty where it sits on the Suzuki. To avoid issue I pull out my 4 spares and swap it straight out as thats the best option. Now back to the console on on turns the motor and away we go.....
I could give plenty of other examples but fact is I aint no mechanic but I can do the basic to help the situation but like all new 4stroke's you cant fix everthing out remote. First rule on the water is safety, thats my deckies saftey, Sea Rescue safety then my safety as I never put myself above others. Second rule is never head further into trouble (I end all my trips early if an issue arises). Third rule is no fish is worth a life. I'm not wasting my time writing more for you but the more remote you are the more responsible you have to be. So fact is that I haven't had to call Sea Rescue yet in my boat but my day will come as I cant beat that Statistic living in such a remote location. Hence I prepare as best I can.
So by now Bryan you've worked out that I have the following list of safety gear:
3 anchors
2 fuel seperator/ filter
(now) 3 fuel filters
Full compliment of required safetly gear such as EPIRB / Flares etc.
Now Bryan do I actually need the VHF according the RST requirments? You do the research but to save time I have one anyways (remember the communicatiion mantra above). And yes Bryan I always thank the Sea Rescue for listening in.
Satellite phone. Again Bryan tell me why and how I aquired the Sat phone......
Plenty of fuel/water and food in case I have to wait it out.
Now the list actually goes on but you get the idea.
So thanks to Rob I can add another preventaive measure to equation with the Filter. Sure fuel stabilisers help but they dont remove the problem entirely; some water still gets through and from my research they are not designed to combat dirt, just the inhernet concetration of water in fuel. What brand do you use?
Enough said.
sarcasm0
Posts: 1396
Date Joined: 25/06/09
What can I say?
You really are a dickhead.
carnarvonite
Posts: 8673
Date Joined: 24/07/07
Shite fuel
Was half way across the Tasman heading for Eden in crap conditions, when we pumped a back tank forward to the day tanks, first goes a gen set, ok, start the other then work out why it stopped. Then that gen set goes down then the main straight after.
Long story, the back tank was contaminated, had to dump approx. 1500 litre of diesel in to the bilge till we got clear fuel, flattened both banks of batteries, had to rely on a single cylinder diesel 24volt set to recharge batteries. All up we were stopped for about 6 hours till we got enough grunt to start both gen sets and another hour till the main was up and running.
Thank heavens we didn't have any more trouble as no more filters, used 6 sets on the main and 4 on each of the gen sets. 600nm is a long way to get someone out to assist if you are broken down.
My preference on a big [over 15 metres] is twins but on smaller vessels a well maintained single with good electronics to call for help if needed
D_d_001
Posts: 1522
Date Joined: 09/03/13
Strange sort of comment that
Strange sort of comment that I don't quite understand. (damo6230)
I think what Rob is saying is that in general twins are more reliable than a single engine. Of course bad fuel can stop both engines along with a few other problems but for every instance of duel engines both breaking down at the same time I'm sure we could come up with 5-10 instances of a single engine leaving the boat DITW.
Rob H
Posts: 5806
Date Joined: 18/01/12
(No subject)
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
Vinesh87
Posts: 2751
Date Joined: 02/04/11
Ah the age old
Ah the age old question!
I have been pondering this for a while so here is my thoughts ( FYI i have never owned twins, but have been on quite a few boats with twins)
Cost Example:
Twin 200 Yamaha's 53k
Single 300 Yamaha 33k
So there is 20k extra if you go twins straight away. I compare 400hp twin to 300hp single because you will never get the same output for twins as you do with singles due to extra drag and extra weight etc etc.
Weight:
Twin 200 Yamaha's (4cyl that is) = 450kgs
Single 300 Yamaha 255kgs
So close to double the weight, the boat would have to be built in mind and maybe move a fuel tank more forward to even out the weight balance.
Better redundancy, twice the service costs, worse economy, more weight, more up front costs, better trimming, better docking(depends on spacing)
After all that i have decided i will still go with Twins haha, every boat i have been on with twins just seem to ride better, maybe its just the extra weight but it seemed that way!
Has anyone seen the Optimus 360 steering on twins ? Looks like a total waste of money but awesome !
Lastchance
Posts: 1273
Date Joined: 02/02/09
Twin 150's would usually
Twin 150's would usually suffice for a single 300 though, that would lower most of the numbers you mention, but I agree with what you have said. I have a 250 on my boat and have been on the identical model with twin 150's and it is a totally different boat.
Not sure if the differences would warrant a twin set up if I repowered it, but definitely worth researching for someone looking to have a boat built.
Daisy
PS, wouldnt be interested in a 7.5 Preston Craft would you?!
Vinesh87
Posts: 2751
Date Joined: 02/04/11
You would never get the same
You would never get the same top end speed with 2 x 150's as you would with a single 300 is what i meant. But in terms of torque you will be better off with for prop in the water.
The only reason i compared 200's is they are only 10kgs more than the 150's and the 175's dont come in counter rotation!
What do you mean different, quicker to plane, economy, handling?
Have sent you aa PM about the Prestoncraft!
JohnF
Posts: 2838
Date Joined: 07/07/10
Likely reason twins ride
Likely reason twins ride better is they are normally on a bigger boat.....haha.
My mate has twins on his 285, me single on my 235. I have driven both a lot, i find the single a lot easier to trim correctly. Heaps of extra cost with twins And a lot more to go wrong, but when going wide with a single I always have that little niggle in the back of my mind. Two epirbs, good VHF radio, 75 L water and positive flotation risk mitigation.
If you have heaps of coin, go twins for the peace of mind, otherwise single better in almost all other respects. If your into a 25 ft boat plus, then unless it's ally, your in twin territory regardless.
Boston Whaler 235 Conquest......getting the flogging it was built for.
Vinesh87
Posts: 2751
Date Joined: 02/04/11
haha yes the boats in
haha yes the boats in question are Fury 282 and Airider 7.6m so yeh massive boats both over 4t!
Why do you find it hard to trim? Just the seperate trim switches hard to get exact ? The new digital binnacles can match engine RPM which helps, not sure about the trims!
dodgy
Posts: 4578
Date Joined: 01/02/10
Will need twins for sure on
Will need twins for sure on the airrider. Massive hull drag and really need the power to push them. Pair of 350's on the one I drive and more would be nice.
Does anyone know where the love of god goes, when the waves turn the minutes to hours?
Vinesh87
Posts: 2751
Date Joined: 02/04/11
You talking about the Derby
You talking about the Derby rescue boat ? How do you find it ?
I said 7.6m but i meant 7.3m,the 7.3m really boogies with 2x175's! I will be looking at 2x200s for the weight factor.
eziliving
Posts: 876
Date Joined: 30/12/09
Port hedland rescue boat
Port hedland rescue boat
Get busy living, or get busy dying!
dodgy
Posts: 4578
Date Joined: 01/02/10
That's the one. 9.3m so 10m
That's the one. 9.3m so 10m overall and 3.5 wide. Bit over 6.5t on the water. Goes quite well through the short chop we get up this way. Not a particularly efficient hull due to the shape but that's what makes it ride like it does.
Does anyone know where the love of god goes, when the waves turn the minutes to hours?
carnarvonite
Posts: 8673
Date Joined: 24/07/07
Derby boat
Pretty sure the Derby rescue boat has twin diesels not outboards
JohnF
Posts: 2838
Date Joined: 07/07/10
The twin boat seems more
The twin boat seems more sensitive to lean, and you have to stuff about with the trim between motors else the boat leans. No biggie but just not as easy as a single.
Boston Whaler 235 Conquest......getting the flogging it was built for.
JohnF
Posts: 2838
Date Joined: 07/07/10
My mate was looking at an
My mate was looking at an airider. I saw a video and it looks like it rides like a cat, very flat around corners which gives a weird feeling. Are they any good?
Boston Whaler 235 Conquest......getting the flogging it was built for.
Vinesh87
Posts: 2751
Date Joined: 02/04/11
I rate them very highly, a
I rate them very highly, a mate has one and i never noticed it feeling like a cat at all, and the ride was second to none in my books.
They are a very heavy boat but, the 7.3 comes in at 3.6T
A lot of people that i spoke to don't like the handling but i did. Still looking at building on myself!
Rob H
Posts: 5806
Date Joined: 18/01/12
we have one as a crew
we have one as a crew transfer boat, 8 or 8.5M I think and twin 300's from memory.
Adam knows more about it but a fair bit of trouble with cracking and the suspension seats were a must inside Dampier harbour with a fresh breeze.
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
carnarvonite
Posts: 8673
Date Joined: 24/07/07
Air riders
Took the Exmouth one for a test run when we were looking at a new boat here in Carnarvon, was not impressed with it, broached way too easy for my liking in the tidal slop off NW Cape Jetty and the ride was hard compared to a 10 metre Naiad. We finished up with a Naiad with twin 300 Yammies but made the mistake of getting the Ulman seats.
dodgy
Posts: 4578
Date Joined: 01/02/10
Havnt been able to recreate
Havnt been able to recreate that in the last 150 or so hours. When trimmed right in it can steer off the bow a little but skippers shouldn't find themselves in that situation anyway. We specified the 350s which put a fair bit more weight over the transom too. No doubt that helps.
The Airriders don't have much trim range but they are quite responsive to the trim you can get out of them. Just hours in the skippers chair to get used to them and get them working their best.
Does anyone know where the love of god goes, when the waves turn the minutes to hours?
Luke
Posts: 167
Date Joined: 02/11/09
The biggest difference is the
The biggest difference is the exmouth swell, some boats really can't handle it properly and want to broach.
I'm going twins on the new rig, I like the idea of redundency and with the size im getting a single 300 will not quite cut the mustard.
The new lightweight 4 cylinder 4 strokes look good, I'm going with twin lightweight 200 suzukis. Twins can sometimes help a boat track better with a following sea and help the boat track straighter with the two legs going through the water.
vinniefisho
Posts: 212
Date Joined: 21/01/15
i prefer the twin one
i prefer the twin one smaller than the other. you can troll better with it speed wise also if one of your motors brakes down or something happens youve still got another one to get you back to the boat ramp. a bad thing would be the costs but its probably worth it coz u wouldnt wanna be stuck out on the water becoz one of your motors has broken down
Paul H
Posts: 2104
Date Joined: 18/01/07
Why not go the yank route -
Why not go the yank route - put four on and be done with it
but yes watch where your going
http://fishwrecked.com/forum/how-safely-park-your-boat-or-how-not
If going for a new motor/s
- monohull - single (unless won lotto or going very remote)
- cat -twins (obviously)
Youtube Channel - FishOnLine Productions
https://www.youtube.com/channel/UCbUVNa-ViyGm_FTDSv4Nqzg/videos
Vinesh87
Posts: 2751
Date Joined: 02/04/11
Another note on the size boat
Another note on the size boat your looking at Twins could push you over 3500kgs!
Silver Fox
Posts: 1116
Date Joined: 19/06/14
Seven 557
Four of the Seven 557's.......:) America....... Fuck yeah!!!!
My wife understands why I clean my rods n reels in the shower....
terboz123
Posts: 1358
Date Joined: 13/04/11
thanks for the info guys and
thanks for the info guys and opinions...appreciated
a hard days fishing still beats work
PGFC member
GCGFC memberranmar850
Posts: 2702
Date Joined: 12/08/12
One side note to this
I have recently purchased a Swiftcraft Dominator powered with Twin 60 HP two-stroke Mercs (nineties models) I know the owner, he has had it since new, always very well cared for. Motors should be quite low hours, start at a touch, and purr. My first thought was, do a year then re-motor with something like an F115 Yamaha. But since i have been fishing with it, my thinking has changed a little. My first trip consisted of a run up to the first sandpatch (5nm) at 20 kts--, 3200rpm. I then trolled for a few hours on one motor, didn't shut off at any stage. Then steamed out to the three mile from the sandpatch, at least 4nm, trolled there for a while before doing a couple of drifts with jigs. Then steamed home via the Gorges and a troll from there to the rivermouth .If anyone knows Kalbarri, this is actually a few miles by the time you add it up. At least one motor was running for all but 15 minutes of the 5 1/4 hrs I was in the water. Filled the tote tanks up and only took 35 litres, total, filled to the brim. All trolling done on one motor , 1900-2000 rpm.
So, by my reckoning, this is only 7 litres/hr average for the day. I'm very sure I would have used more than that with my 90Hp Yamaha 2 stoke--it uses about 14 l/hr trolling according to the LMS-200 fuel flow gauge fitted.(which read about 10% high) Would a big, single four stroke do much better than this, 7 l/hr average for that mix of travelling and trolling? If it were more biased towards travelling distances, I'm sure the four stroke would be better overall, but i don't tend to do big miles to where I catch fish.
Reading the horror stories about issues people have had with these hi-tech four strokes,which seem horribly overpriced, it would seem the only advantage with the big four strokes over the big 2 strokes they replaced is fuel consumption and resale. Looked at the Brisbane Yamaha site recently and they had the 115HP v-four 2 strokes for less then a 90hp stroke. Almost half the price of the equivilent 4 stroke, and lighter,and bloody bulletproof.
Deleted
Posts: 6265
Date Joined: 26/04/14
2014 90hp 4 stroke suzuki on
2014 90hp 4 stroke suzuki on a 5.5m plate ally raider tournament 110ltr fuel filled to the top, 2 big blokes and gear. i did roughly 40nm in poor conditions so never really got above 3500rpm at a guess and refilled with 26.6 litres. dont no how to turn that info into litres per hour but thats a idea of what i get from my motor.
Rob H
Posts: 5806
Date Joined: 18/01/12
certainly does just depend on
certainly does just depend on your budget, usage and tolerance
But after picking up a boat with an F115 on it 5 years back I found my boating enjoyment completely revitalised.
Like you Ive spent almost all of my working life at sea but the 4 strokes to me instill a lack of "urgency" (dont ask me to explain it!) maybe attributed to the lack of noise, oil, smoke, oil residue etc.
On youir usage though, twins, close to town, short trips etc theres no reason not to keep them if they run well.
Sounds uppity I know but I have to look away when an old 2 stroke starts next to me "ring ting ting cough splutter stall, ring ting cloud of smoke then a handful of screaming throttle"
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
ranmar850
Posts: 2702
Date Joined: 12/08/12
Mine don't do that "cough" of course
I don't think I'll invest in that system for this boat--it has carry tanks, so i always know what is in there. Things have changed a lot since my last post--given a redundancy, with a good payout, so I am cashed up, and considering my options. They currently revolve around fishing a lot and not working...
a new 4s may or may not be in the mix. I understand what you mean about the "urgency" --I go out on a mates boat a lot, with one of the original 90hp 4s Hondas on it, very quiet and smooth, if a little slow. Though the wail as the twins get up and go is addictive....
Deleted
Posts: 6265
Date Joined: 26/04/14
if you are asking me?, the
if you are asking me?, the lowrance fuel flow sensor is in the pipeline for the near future.
Rob H
Posts: 5806
Date Joined: 18/01/12
yeah not sure if its Gilly or
yeah not sure if its Gilly or me, but I dont have the old Trailcraft with F115 Yam anymore.
However on the old Navman with fuel flow gauges which proved quite accurate, it was a touch better than 1nm per litre under normal running and loaded up (heavily) for the Abrolhos about .85.
20 LPH at 20 knots.
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
ranmar850
Posts: 2702
Date Joined: 12/08/12
I was asking RobH re his F115
He mentioned an F115, I was assuming he still had it. My CC actually came with the old navman fuel monitor setup which wasn't working, I elected to go the new Lowrance setup, has been very good with no issues over five years. I've done the calibration sequence, still seems to be 10% out. At least I know I've got more in the tank than it says I have.
Rob H
Posts: 5806
Date Joined: 18/01/12
now I have twin DF115 suzi's,
now I have twin DF115 suzi's, but no fuel flow meters.
A mate has twin new DF115 on his boat with the fuel Garmin fuel setup and they use about 13-15LPH at 20 knots, pretty good on juice.
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.