1988 15hp gamefisher

[zulej8]

I recently bought a used gamefisher online. I took it out after i cleaned out the carb and it ran great until it overheated. Brought it home and ordered a water impeller and it started spitting water and not overheating but when i got it out on the water, it wouldnt plane out and seemed like it was not getting the the power it had before. any ideas what could be the problem?

 

[Whoopbass]

Re: 1988 15hp gamefisher

Head gasket may have blown (if your lucky) Cheap easy fix.
Do a compression check.

 

[fishrdan]

Re: 1988 15hp gamefisher

Did you try this?

You could have dead cylinder, try this.
- Pull a plug wire and start the engine, does it start, does it run the same, less RPM?
- Reconnect that plug wire, disconnect the other and start the engine, does it start, run the same, less RPM.

You are hoping that it will run of each cylinder when 1 of the plug wires is pulled, if not you have a dead cylinder, probably the ignition system. I found out (the hard way) that these outboards will run off 1 cylinder and seem to run OK in the test tank, but not on the water.