I had a problem with this motor starting sporadically. I fixed that by using Marvel Mystery Oil and Yamaha Ring power carb. cleaner. I put in an overdose of the Mystery Oil and now boat isn't running properly. I have drained the fuel tank and replaced with fresh fuel. I have now just replaced the spark plugs. Seems a little better, but not good. The rpms are at 4000 at full throttle with the trim down. The rpms go up if the trim is up. Does this seem right or did I screw something up with the overdose of Mystery Oil. Thanks for any input. Al.
