I/O Diesel legs/jets
Submitted by Vinesh87 on Wed, 2014-03-19 17:31
I am looking at a Diesel inboard for my next boat(Maybe but probably not)
The question i have is:Are there any sterndrive legs ( bravo, alpha, Yanmar 6LPA or any other) that have the ability to come right out of the water. Incase its a very shallow launch to drop the boat on the sand? Or to skim across that super shallow reef?
Add jets to that list!
Happy to hear anything else about Diesel inboards vs twin?
Cheers,
Vinnie
carnarvonite
Posts: 8663
Date Joined: 24/07/07
Jet unit
Have you considered a jet unit, less moving parts and around the same efficiency as a leg.
Castoldi has units that bolt on to the stern where as Hamiltons sit underneath.
Both units are heaps cheaper to buy than legs
Vinesh87
Posts: 2751
Date Joined: 02/04/11
Nah i havnt even thought
Nah i havnt even thought about that. Will have a look.
Cheers
Looks very interesting actually. Would certainly be as shallow drive as you could get. How would it go with the intake running close to the sand in the shallows or sitting in the sand when beached ?
Rob H
Posts: 5789
Date Joined: 18/01/12
they handle it no worries,
they handle it no worries, designed for it.
But they arent so flash in open water depending how deep the V is, and also (in general) arent as efficient when heavily loaded
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
Yeh fair enough, not for me
Yeh fair enough, not for me if not good in open water haha.
Guess it's back to 1or2 Zukis
Rob H
Posts: 5789
Date Joined: 18/01/12
I have looked fairly close
I have looked fairly close also Vin, none will come right out of the water due to the pivot point is already at waterline level.
All of the modern ones should lift above the keel level to allow beaching but none of them like being in gear at that tilt as the uni joint angles are extreme especially with a bit of helm on.
And thgats the main reason I cant go to one, I like to sneak across the shallows at the islands but if the leg cant operate at the trim then its going to be exposed and the duoprop type setup is especially vulnerable.
The Yanmar legs do look nice though having wet clutch type setup rather than a clunky dog clutch like most.
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
Nah my alpha doesnt like
Nah my alpha doesnt like beaching at the moment haha. Think that operates pretty much trimmed right up.
I figured it was just a pipe dream at this stage.
Really like the look of the Yanmar with joystick control ( Total gimmick but why not)
shonky
Posts: 203
Date Joined: 22/04/12
Tuff
A mate of mine managed to drop a 26 footer in the middle of Ennis ave in Rocky quite a few years ago, the steel hull had a few dents in it and so did the road but the jet unit was completely unscathed.bloody scary experience when the boat your supposed to be towing is suddenly next to the passenger window. What followed next was like a scene for a king gee add with the recovery.
This habit is getting expensive!
Vinesh87
Posts: 2751
Date Joined: 02/04/11
True, was the jet right under
True, was the jet right under the boat like in the photo i posted or out the end ?
Any ideas if they suck up sand ?
Losing a boat can only be bad. I always worried about it. Even with my winch, chain straps haha
Vinesh87
Posts: 2751
Date Joined: 02/04/11
Jet is about 200kg. Pretty
Jet is about 200kg. Pretty damn heavy !
Daaron Holmes
Posts: 58
Date Joined: 25/04/10
I have a jet unit. Inshore or flat seas only.
Has 2 speeds on it Vin, on the gas or on the trailer.
shallow work is great, trolling is a pain in the you know where.
constant steering adjustment.
loaded is a pig on fuel.
runs a 5.7 chev btw.
will upgrade to twins or large single late this year if all goes well.
has a sand trap so no drama there.
youtube some footage, can drive in zero water and a foot away from the shore.
been to scared to try however.
cant run out of water, this is not negotiable.
have to disconnect from motor to flush motor also pain in the .....
but have heat exchanges so don't disconnect just use water pressure..
would I buy another? Sure if it was a 50 ft west coaster and I lived at the abrohlos.
do like the fact the motor is on board and accessible if and when things go wrong. V8 chev is not that hard to get home if need be.
ran 10 wraps of 100 lb leader when the fan belt snapped in jurien last year. Bloody McGuyvered it all the way back in.
Insert humerous comment here....
Vinesh87
Posts: 2751
Date Joined: 02/04/11
Thanks for that! Why only the
Thanks for that!
Why only the 2 speeds? Just arnt happy at low revs ?
Damn that is some bush mechanics good work haha!
Don't think its for me. Looks like its going to be twins!
Daaron Holmes
Posts: 58
Date Joined: 25/04/10
Nailed it Vin
There seems to be a whole lot of nothing going on till you plane. 1000 rpm to 2800 rpm for mine.
stab it to 3 grand and will leap out of the water. No worries at all.
gently back to 2850 maybe ok but will sometimes fall back in and bog down.
Worse with a load.
its the old go hard or go home thing.
great for racing however.
Insert humerous comment here....
Rob H
Posts: 5789
Date Joined: 18/01/12
Daaron has nailed it there
Daaron has nailed it there Vin-I have looked closer at jets also considering how much time we spend 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.
Browndog
Posts: 582
Date Joined: 10/04/12
Arneson Surface Drive
Hey Vin, PM sent.
Check Arneson Surface Drives, very efficient and way cool!
One powerball......
Cheers,
BD.
Vinesh87
Posts: 2751
Date Joined: 02/04/11
Hmmmm interesting! Probably
Hmmmm interesting!
Probably not so good for trolling or towing divers but ?
Looks cool!
pelagicyachts
Posts: 1322
Date Joined: 23/02/11
Vinesh in my very limited
Vinesh
in my very limited experience (ie a few boat trips on 7m boat running a Hamilton) Jets seem to like/need rpm to be effective - at manouverability a bit of compromise
I had a boat that had twin merc diesels (220hp) running through bravo 2 legs - legs are good, the diesels were good, the "marinisation" side of the Mercruiser diesel "not so much"! - was very efficient when it wasnt having elbows replaced!
Arneson are the nuts - dont see them too much here but they seem to like them in s/east asia in military/navy/customs applications.....
carnarvonite
Posts: 8663
Date Joined: 24/07/07
Revs
With any jet, you need to have plenty of revs and control manouvering by using the bucket unlike shaft or sterndrives
Vinesh87
Posts: 2751
Date Joined: 02/04/11
A bucket like a 9l mayo
A bucket like a 9l mayo bucket ? hahaha
Or is that the thing on the back of the jet ?
carnarvonite
Posts: 8663
Date Joined: 24/07/07
Reverse
That's what they call the thing on the back of a jet unit, to get reverse you drop the bucket and it directs the stream back under the boat, no changing gears or dropping revs.
They are fun things to drive and very scary when you are learning if it has plenty of grunt
Rob H
Posts: 5789
Date Joined: 18/01/12
Vin
this is what you need, jump in about .50
http://www.youtube.com/watch?v=7eH28HTpeao
http://www.youtube.com/watch?v=EaJzVtxqM0o
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
Yep i get ya, didnt really
Yep i get ya, didnt really think it was a mayo bucket pelagic haha
Looks fun as for sure, and good shallow running haha
Good vids Rob, nuts as i dont need to go that fast haha
pelagicyachts
Posts: 1322
Date Joined: 23/02/11
be a short and interesting
be a short and interesting life for the mayo bucket the first time you grabbed reverse!