85 hp johnson carb problem?

[fordhp1]

I just got my boat out of storage for summer, I start it on the hose it misses and pops out of the bottom carb, I had the carb silencer plate off. then it starts to rev uncontrolable the key wouldn't turn it off I had to manual pull the choke to shut it off. everytime I tryed to start it, it did it, after its run awhile. what makes it do that, I wasn't using the throttle or anything.

 

[JB]

Re: 85 hp johnson carb problem?

Lots of possibles, Fordhp1.<br /><br />Check all linkages. . . make sure the throttle is all the way closed at idle, stator is all the way retarded, flywheel key is not sheared. Inspect the reeds.<br /><br />If all that is okay, get a manual and do a complete linkage and synchronization adjustment.<br /><br />Do not start the engine again until you are sure the problem has been found and fixed. Thermal runaway can destroy your engine.<br /><br />Welcome aboard.

 

[fordhp1]

Re: 85 hp johnson carb problem?

thanks for the reply I will check all linkage, the engine is a 1971 no shops here in southern wis, northern il will work on it, they call it a boat anchor. what is thermal runaway thanks

 

[JB]

Re: 85 hp johnson carb problem?

Thermal runaway is when the engine turns so fast that it converts itself to a Diesel and far exceeds safe rpm with no load. Result is often a blown up engine.