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Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 3719
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: 1 year ago.
Category: Boat
Customer: replied 1 year ago.
e mail.***@******.***
Expert:  Charles replied 1 year ago.

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

Has your engine been sitting for some time?

Customer: replied 1 year ago.
about 6 mo
Expert:  Charles replied 1 year ago.

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

Is the oil level high in the engine?

Customer: replied 1 year ago.
used it one or two times in yr gas is new
Customer: replied 1 year ago.
oil is ok new filters two
Expert:  Charles replied 1 year ago.

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

Customer: replied 1 year ago.
on sign of leakage,
Customer: replied 1 year ago.
one and two cylinder ok 3 and 4 not working we know we are firing
Customer: replied 1 year ago.
have to go , not good response.thanks
Expert:  Charles replied 1 year 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 1 year ago.
thanks,will do tomorrow. the spark plugs were damp
Expert:  Charles replied 1 year ago.

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

Customer: replied 1 year ago.
will get back after test,thanks
Expert:  Charles replied 1 year ago.

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

Customer: replied 1 year ago.
will do
Expert:  Charles replied 1 year ago.

Thanks

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