1987 80HP Mercury

[ItsJrock]

Hello,

I have a 1987 Mercury 80HP 3CYL engine on a 16ft skeeter bass boat. There are a couple issues with the the motor,

1. The engine misfires when coming off plane, at about 3000RPM, the boat starts to misfire terribly. I put it in neutral and it goes away.. I'm thinking stater.

2. Serial Numbers... The one on the engine says A727384 but I CANNOT find anything online about this model of engine. The only model i can find is A722297.

Any Ideas about number the Serial number? I also think that replacing the stater will fix this because i have rebuild the ENTIRE fuel system, plugs are good, compression is at 120 on all 3 CYL good spark. i have done a trigger and coils. My Voltmeter tells me that at about 5500RPM's the boat is charging at 18V.

Thanks

 

[flyingscott]

Canadian 1987 model 80 hp. If you have an unregulated charging system your voltages will be higher but they usually top out at about 16 volts. Have you done a link and sync.

80

1987

ELO

A966142 - B240450

A722297

80

1988

ELPTO

B240451 - C099999

A730007