Bonstrosity
New member
I have a 1990 Johnson 88SPL (J88mslesa) that is having some trouble. The engine fires up and idles without much if any trouble. It needs the key bumped a few times with the throttle advanced a little bit but fires up right away. However if the engine is cold it bogs down and dies if you try to put it into gear and throttle up. In gear idling is not a problem. If you bump the key to give it some more gas while it is bogging it will gain power and run as you would expect. Once the motor is warmed up, it does not have this issue.
Work done on the motor:
Recent power head replacement - Compression is 110psi across all 4 cylinders
Water pump rebuild
Carbs cleaned multiple times, dipped in solvent and all passages/jets cleared with a wire - plastic bowls replaced with metal
New Coils, plugs, wires (New plugs after initial break in)
Carbs linked and synced per the manual
Rollers on throttle cams replaced as they had deteriorated and fell apart.
New Carb gaskets - assumed a possible vacuum leak.
Any suggestions would be greatly appreciated.
Work done on the motor:
Recent power head replacement - Compression is 110psi across all 4 cylinders
Water pump rebuild
Carbs cleaned multiple times, dipped in solvent and all passages/jets cleared with a wire - plastic bowls replaced with metal
New Coils, plugs, wires (New plugs after initial break in)
Carbs linked and synced per the manual
Rollers on throttle cams replaced as they had deteriorated and fell apart.
New Carb gaskets - assumed a possible vacuum leak.
Any suggestions would be greatly appreciated.
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