1990 Force 150 wont idle or run correctly

[mike ferland]

All work done by marine repair facilities: Spring: Had problem idling, one of the pump baffles was replace, idle good. Went to the lake to test, ran good but over temp alarm sounding. Used the lakes marina service to replace water pump impeller (they had difficult time getting lower end back on) once on, it wouldn't idle in the neutral position, died. It took over a week for them to get the lower end on and I had no problem with the motor running before I got the impeller replace so we settled on parts replacement and no working motor. Through the grape vine, found veteran service tech with 30 yrs of experience on older outboard motors.
It's now been 3 weeks he's replaced all reeds and carb gaskets (not running right), replaced all five spark plugs and new fuel pump gaskets, he's also had a fellow tech help him and they both cant get it to stay running in the idle position. It starts fine but once throttle is brought back to the neutral position it kills the motor immediately. Is there something obviously he's missing like some sort of switch killing motor.
V/r Navy Chief Ret.

 

[Frank Acampora]

Has anyone bothered to check compression ratio on all cylinders? These engines are known to break the top rings on the piston(s) and will start and run with one or more bad pistons--but, of course, idle will be crappy and it will probably stall at idle.

The next obvious thing to check is the CD units. There are three CD boxes and again, If one is not firing a cylinder---guess what will happen at idle. The stator also needs to be checked to ensure that it is charging all three CD boxes.

Personally, the LAST thing I would have done would have been to change the reeds--compared to ring breakage and ignition failures, they are relatively trouble free.

I really think you need to search out ANOTHER mechanic. 30 year veteran or not, the one you have is doing you no favors. Sometimes they have been making the same mistakes for 30 years.