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Old 24 August 2013, 05:38   #1
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Stood for over two years

Hi all, ive just got my first boat it has a Yamaha 30ae two stroke, it's been sat for over two years, the starter motor had become stuck so removed it cleaned it up put it back on, and the motor started first turn of the key, but it was leaking fuel from the carb, so removed it cleaned the float put it back on, so now we have no fuel leak but the motor is running rough! It starts and then slowly starts to die, so add some revs and it picks up then slowly starts to die again, so now on full revs motor is running lumpy but not revving very well, when it starts to die if you pull choke out and in quickly it will pick up again for a short time then start to die again the only way to keep it running is to pull choke out and in every 5/8 seconds,I'm after a bit of advice on what should I be looking to do next, thank colin

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Old 24 August 2013, 06:24   #2
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Sounds like carb jet issues? Which would fit with being sat. A strip and clean would be my first action.
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Old 24 August 2013, 07:03   #3
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Quote:
Originally Posted by PeterM View Post
A strip and clean would be my first action.
Seconded

Whenever I buy an outboard the first thing I do is strip and clean the carbs, that way I KNOW they are clean, I've found all sorts of gunk and debris in the bowls, god knows how most of it gets there.
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Old 24 August 2013, 07:35   #4
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Thank you guys, I'll let you no how I get on, have you got any tips on what to use or best ways to clean them?

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Old 26 August 2013, 08:25   #5
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A tin of carb cleaner will work wonders. Even the cheap ones. Make sure you get it through the idle passageways which are sometimes so small you canlt spot them easily. Also if you have dismantled it fully, did you put the idle screws back in the right place?

Other though if it's a slow death - is your fuel pump diaphragm still in one piece?
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Old 26 August 2013, 09:36   #6
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Stating the obvious, but hope it's new fuel and oil..... Just a thought
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Old 26 August 2013, 16:13   #7
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Oh yes, new fuel fuel lines new oil fuel filter, won't get time to do it now till Thursday, but will keep you up dated thanks

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Old 26 August 2013, 17:33   #8
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Make: Sea Rider Boats
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If engine was stopped with fuel in carb, check fuel pump diaphragms, might be deteorated, dried, ballooned, cracked. If need to prime bulb or pull choke when engine is dying it's a clear sympthom of fuel pump issues. Diaphragms are not eternall.

Happy Boating
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