Give me some ideas mechanical
Submitted by scottland on Thu, 2017-12-21 11:38
Have a 99 merc anywya got my 20 crabs yesterday was on the way back in motor started coughing and stopped tried to restart but the motor rolled over slow like the battery died lifted the leg to see if I sucked up some weed. Put it Down and it started. Tried lumping it home went home got about 2 more minutes and it completely died again got a tow home (thanks lads if your here) know it's trying to start but a lot slower than usual
also I changed the spark plugs hoping it would be that but no dice
3 week wait in all stores just to get it looked at helpppp! Haha
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Rob H
Posts: 5797
Date Joined: 18/01/12
Process of elimination,
Process of elimination, SIMPLE OBVIOUS AND CHEAP stuff first!
Check your battery first, could be near flat and not charging.
If it is cranking slow it is electrical-battery, earths, dodgy cable or starter motor.
In this case its stopping so unlikely to be starter itself.
Less likely but a possibility is it has over heated and partially seized but that is a long way down the list to check.
Easy way though (you dont say what size it is) take cover off and spin flywheel, should turn free about 1/4 turn then hit compression.
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.
Piggy
Posts: 549
Date Joined: 24/08/12
Agree with Rob
Agree with Rob above. If you have a multi meter try clamp the multimeter probes to the battery. Might show more than 12 volts with no load but when you crank it if it drops below 10v then you might have a cell knackered in your battery.... That's what it sounds like to me anyway.
If it stays above 10v when cranking then do the same test at your starter motor which will rule out cables.
Where are you located? and where did you get the crabs haha
I go boating not fishing
Niko
Posts: 213
Date Joined: 26/11/13
Hows your oil
Hows your oil condition/level?
Did you get any over temp warnings?
Possibly got to hot or lack of lubrication causing it to pick up in the bore or bearings. Once cooled down for a few minutes it may have released before going again but wouldnt have run for long like you experienced.
Slow roll over may be excess friction caused by damage to bores or bearings, other than starter or battery not many reasons for slow roll unfortunately.
Could try take plugs out and roll over by hand should be smooth and roll fairly easily.
And check oil for metal filings
Niko
Posts: 213
Date Joined: 26/11/13
Like above if battery
Like above if battery average or even ok check alternator charge rate if able. A bad battery wont always cause you to stall at speed but no charge will
scottland
Posts: 3038
Date Joined: 10/05/10
Cheers boys
i was worried about the oil myself I filled it up before I left it's a 60 merc wondering if something was cross contaminated I did just change the fuel tanks like 10 mins before it happened it does turn over by hand feels free tommy knwledge
i support two teams eagles and whoever is playing the dockers
Faulkner Family
Posts: 18026
Date Joined: 11/03/08
have a look at the leads.
have a look at the leads. may not have spark getting through.
get some fresh fuel going through and see if it fires. may be dirty fuel that went through
RUSS and SANDY. A family that fishes together stays together
scottland
Posts: 3038
Date Joined: 10/05/10
Did
did the old volt drop on start up went to 10. Something gotta be the battery but y would it stop mid run?
i support two teams eagles and whoever is playing the dockers
Rob H
Posts: 5797
Date Joined: 18/01/12
If the battery is not
If the battery is not charging yes it could.
What is the voltage when its not trying to start?
And have you put it on charge then tried starting?
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.
scottland
Posts: 3038
Date Joined: 10/05/10
Yeh charged all night
charged all night reads 12.5 then goes down to 10.1 10.5 ish if it's my battery I'll be stoked hahahah
i support two teams eagles and whoever is playing the dockers
Dale
Posts: 7930
Date Joined: 13/09/05
Sounds like your battery is cactus
"Just because you are a Character, Doesn't mean you have Character."
Mr Wolf
scotto
Posts: 2470
Date Joined: 21/04/08
Battery
reading above, I call battery.
meglodon
Posts: 5981
Date Joined: 17/06/10
Yep have to agree with Dale
Battery might read 12.5 with no load, put a load on it and it drops to 10. something = battery cactus.
how old is the battery.
scotto
Posts: 2470
Date Joined: 21/04/08
car
just try starting it on your car battery for a test.
squidvicious1
Posts: 824
Date Joined: 22/07/10
You tilted the motor up than
You tilted the motor up than down,and it started.than went no where,I'd say some muck or hard oil deposits have come unstuck and doesn't go after deign down.plus the battery problem.
scottland
Posts: 3038
Date Joined: 10/05/10
Fingers crossed
Fingers crossed it starts tomoz on my car battery
i support two teams eagles and whoever is playing the dockers
Rob H
Posts: 5797
Date Joined: 18/01/12
Try it now we're all friggin
Try it now we're all friggin waiting!
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.
scottland
Posts: 3038
Date Joined: 10/05/10
Well rob
took the advice and put the car battery and drum rolll badumdumdumdumdum we still have a slow roller goodbye merc
i support two teams eagles and whoever is playing the dockers
scottland
Posts: 3038
Date Joined: 10/05/10
So
so died slowly while driving started again. Died again while coughing and spluttering nowslow rolls and won't start. Head off tommorow I think
i support two teams eagles and whoever is playing the dockers
Rob H
Posts: 5797
Date Joined: 18/01/12
I cant really make out what
I cant really make out what your saying, you put the boat battery in your Mercedes?
Or the car battery in your boat and "died slowly while driving started again. Died again while coughing and spluttering nowslow rolls and won't start"
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.
scottland
Posts: 3038
Date Joined: 10/05/10
Car battery in the boat
put the battery from the car in the boat still won't start the way it stopped while operating yesterday ( a cough and splutter) suggest it isn't the starter motor. The only glimmer of hope before I settle on some sort of seizure is the volt drop while trying to start...might leave it tonight and sober up a bit haha
i support two teams eagles and whoever is playing the dockers
Rob H
Posts: 5797
Date Joined: 18/01/12
.
haha, thought you might be on the sauce
Get back to us tomorrow, must be methodical to get to the bottom of 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.
Niko
Posts: 213
Date Joined: 26/11/13
Do you know where the engine
Do you know where the engine earth points are? Dodgy earth could cause your issues, bolt could have come lose and ontact come away, tilt up brought it back into contact before vibrating away again. Should be one on the block and maybe one on the head aswell. Running on partial contact or through alternative earth will cause a slow roll on starter and damage smaller earth cables not designed to carry starter load
A battery dropping to 10v is normal during starting due to current draw of starter. Anything above 9v will not cause any issues. My experience is cars but basic principles of boat motor starting system will be the same. Someone with more boat mechanic experience may correct me
linoc
Posts: 96
Date Joined: 21/11/15
Sounds like an electrical
Sounds like an electrical problem to me, had similar happen in a car in the middle of nowhere ~11pm between QLD & NSW back in the late 80's (no mobile phones back then), passer-by organised a sparky in the next town for me to come out, from memory I think it was the alternator (could be wrong), plus a big call out bill.
Could also be what others said re dodgy connections, earth etc. No doubt/hopfully gunna be something simple you'll do a Hommer D'oh! over, rather than going to the trouble of stripping her down only to later find it electrical.
If me, wanting to get the tub back in the water asap for holidays, call a mobile auto sparky, might find one in your area on Gumtree.
scottland
Posts: 3038
Date Joined: 10/05/10
Update
charged the battery last night read 12.8 motor turns over like normal again. Checked for fuel at the carby bowl that all good checked for spark at the spark plug all good. Might be time for a professional
i support two teams eagles and whoever is playing the dockers
scottland
Posts: 3038
Date Joined: 10/05/10
Hmm started
hmmm started on one squirt of start you bastard now running better than before
i support two teams eagles and whoever is playing the dockers
Walfootrot
Posts: 1385
Date Joined: 23/07/12
sounds like a dud battery was
sounds like a dud battery was the issue, happy ending
More drum lines, kill the bloody sharks!
scottland
Posts: 3038
Date Joined: 10/05/10
Yup
new battery new starter today she'll be sweet cheers boys
i support two teams eagles and whoever is playing the dockers
Rob H
Posts: 5797
Date Joined: 18/01/12
get it in the water and run
get it in the water and run it under load, even if its just backed down ramp and not launched.
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.
z00m
Posts: 1086
Date Joined: 10/05/14
Fuel
You say you changed tanks and it died 10mins later? Stale fuel or water or goo of some sort. Starts on Ether spray so for sure fuel related.