Yamaha 115 Injector Problem?

Dan366

Recruit
Joined
Dec 22, 2007
Messages
3
My 2000 F115TXRY is idleing and running irregularly. I pulled the plug on each injector. When I pull 1,2,4 the rpm's slow down, and it runs worse. When I pull 3, the rpm's pisk up, and it runs smoother. I pulled the plugs--plug 3 is darker than the the others.

Is this an indication of a leaking or sticking injector (#3)?

I pulled the injectors. everything "looks" perfect. I've never seen any traces of water or sediment in any of the filters or in my water separator.

I'm planning on sending the injectors out for testing and cleaning.

Thanks,
Dan
 

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: Yamaha 115 Injector Problem?

dark plugs indicate excessive fuel. could mean a leaking injector. its a good place to start.
did you check the spark and compression ?
 
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