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Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 3370
Experience:  US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
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Have a f115 Yamaha outboard new less than 40 hrs no.3an 4

Customer Question

have a f115 Yamaha outboard new less than 40 hrs no.3an 4 cylinders not hitting new spark plugs,thay are firing,plugs look wet,could 3and 4 injectors be the problem? thanks,john
Submitted: 6 months ago.
Category: Boat
Customer: replied 6 months ago.
e mail.***@******.***
Expert:  Charles replied 6 months ago.

Hello John, my name is***** will assist you.

Has your engine been sitting for some time?

Customer: replied 6 months ago.
about 6 mo
Expert:  Charles replied 6 months ago.

Thanks, ***** ***** is your fuel?

Is the oil level high in the engine?

Customer: replied 6 months ago.
used it one or two times in yr gas is new
Customer: replied 6 months ago.
oil is ok new filters two
Expert:  Charles replied 6 months ago.

Ok, can you do a test ion the fuel rail to see if the injectors are leaking?

Customer: replied 6 months ago.
on sign of leakage,
Customer: replied 6 months ago.
one and two cylinder ok 3 and 4 not working we know we are firing
Customer: replied 6 months ago.
have to go , not good response.thanks
Expert:  Charles replied 6 months ago.

Sorry, I was on the phone with another customer.

Remove the fuel rail from the intake, making sure that the injectors stay attached to it. Place a paper towel behind the bottom two injectors. Then turn the key to ON, look at the paper towel and the injectors to see if there is any fuel on it. if so, have the injectors cleaned.

Customer: replied 6 months ago.
thanks,will do tomorrow. the spark plugs were damp
Expert:  Charles replied 6 months ago.

That is why I am suggesting to test the injectors themselves.

Customer: replied 6 months ago.
will get back after test,thanks
Expert:  Charles replied 6 months ago.

Thanks, ***** ***** no time limits here. Let me know what you see.

Customer: replied 6 months ago.
will do
Expert:  Charles replied 6 months ago.

Thanks

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