Force 120 Outboard stops abruptly

[jeremycm]

I have a Force 120 Outboard (1990?) I just bought the boat at the beginning of this season and has been running great until recently. I was out for a cruise last week running full throttle, all the sudden the motor shut down suddenly. I was not able to start the engine again on the water. The motor wouldn't even turn over. Tonight I managed to get it running again with muffs on but it shut off abrubtly again. I am not very mechanically inclined but do these symptoms sound like a turned piston ring? I am fairly certain I have ruled out any ignition or electrical possibilities. Anyones insight would be greatly appreciated.

 

[jerryjerry05]

Re: Force 120 Outboard stops abruptly

Do a compression test.Does it have a kill switch?
Check the fuel system for blockage,vent line crap in the filter.Ethanol is messing up a lot of motors.It's delaminating the inside of older hoses causing clogs in the carbs and fuel filter.Check for soft hoses and junk in the filter on the motor.Check the diaphram J

 

[wellsc1]

Re: Force 120 Outboard stops abruptly

Sounds to me like an engine seizing. Do compression test suggested. Observe characteristics of the spark plugs. Do not go out again until you remedy the problem. Fix it before it leads to more catastophic problems.