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1997 Yamaha C80, starts ok cold, idle appears to be faster…

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1997 Yamaha C80, starts...

1997 Yamaha C80, starts ok cold, idle appears to be faster than it should. Runs well for 2-3 minutes, revs up ok the it starts to sputter, and possibly misfire. At this point, it will not rev up as well, kind of bogs on acceleration, runs rough and will eventually stall. New plugs, spark appears good??

Mechanic's Assistant: Do you have fuel in the tank? If so, is the shut-off valve open and the fuel clean?

Tank is full, clean fuel and valve is open

Mechanic's Assistant: Do you plan on doing the work yourself?

Possibly, have looked at a couple of times, compression at 120 on all 3 cylinders...I am an old retires automotive technician, have never worked on marine products before

Mechanic's Assistant: Anything else we should know to help you best?

Did have an issue with the remote control wiring, corroded, but this problem has not changed, I replaced the remote, still the same. I do get a beep from the control unit after the engine has run for 4-5 minutes??

Submitted: 2 months ago.Category: Boat
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Answered in 1 hour by:
5/30/2018
Marine Mechanic: Charles, Marine Mechanic replied 2 months ago
Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 4,894
Experience: US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
Verified

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

Does pumping the primer bulb over and over help the engine run?

How long has it been sitting?

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Customer reply replied 2 months ago
No, it sat over the winter, but apparently had this issue late fall 2017
Customer reply replied 2 months ago
I may call but not before Saturday, not near motor now
Marine Mechanic: Charles, Marine Mechanic replied 2 months ago

I cannot call Canada. That was an automated one from the site and not from me.

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Marine Mechanic: Charles, Marine Mechanic replied 2 months ago

Do you know the full model number of your engine?

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