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BF 150 idling rough

M

mdc56904

Member
I have a boat I bought with twin 150's, one of the engines runs okay but the other runs fine when you first start it up but after about a minute it starts to idle rough if you give it a little gas it levels out and runs fine. It does not show any codes that I can tell. It runs out fine just idles rough.
 
HI I'm not a master mechanic but it sounds like a dirty injector. Remembering my carburator days that was the promblem the ventures(not sure spelled right) got dirty so at idle rough running but given throttle engine would soomth out best promblem, worst low compression on a cylinder or leaking valve, engine could just need (seafoam a good cleaning) carbon it happens but a Honda mechanic would be best to help you BEST OF LUCK

Greg
 
grmaro said:
HI I'm not a master mechanic but it sounds like a dirty injector. Remembering my carburator days that was the promblem the ventures(not sure spelled right) got dirty so at idle rough running but given throttle engine would soomth out best promblem, worst low compression on a cylinder or leaking valve, engine could just need (seafoam a good cleaning) carbon it happens but a Honda mechanic would be best to help you BEST OF LUCK

Greg
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You are not off grmaro, I would start with changing the plugs. Then move on to the injectors. After the injectors have been cleaned and the VST has been serviced, all which probably needs to be done, you probably will have cured your problem.
 
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Clean screen in IAC valve on port side of engine. If high hour unit you will need to set valves, if issue persist. You have received good info already!! Sea Foam is necture of the gods to an outboard. Thanks Martin
 
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