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Recently purchased a boat with a 1991 Tohatsu 40 horse. M40D. 3C8. 31293. I knew the motor didn’t run when I purchased but the price was right. What I know about the motor. It has had a new head gasket installed. The motor left him stranded on the water, he installed a new CDI box, said it ran...
Motor has been idling a little rough, loading up at low idle like in no wake zones. Thought I’d try sea foam bake out. Mixed 1 gallon of 91 octane gas, 3 ounces of 2 stroke oil and 1 can of sea foam. Ran for 15 minutes, let cool, ran for 15 minutes and let cool. Hooked everything back up and now...
Read through a lot of the forums and didn’t find anything that compares to my issue. Things I have done to this motor include. New non oiling VRO style fuel pump, rebuilt primer solenoid, new diaphragm in vapor separator check valve, new spark plugs (champion QL78YC, gapped to .034) fresh...
