My 1990 Johnson 40 hp has developed an ignition problem. It starts easily and idles after a warm up period. However, after I drop it into gear and increase the throttle it will not develop any power or go above 2000 rpm. <br /><br />What Ive done so far:<br /><br />1) I hooked up a timing...
I'm doing my first engine rebuild -- a 1991 Johnson 40 horse. I'm well along in the process of putting it back together. I'm at stage of attaching the crankcase head, but feel something may not be right.<br /><br />This crankcase head houses two seals: the lower crankshaft seal and one that...
My 1991 Johnson 40 hp was clacking. I took it apart and found that the rod journal on the #1 piston is discolored and very very rough. <br /><br />I guess I can get it repaired but thought I'd look for a used one also. I see one one ebay from a 1971 Johnson 50 hp. Any chance that is the same...
I was in a sailboat regatta last weekend and I lent my boat to the race committee to use as a rescue boat. <br /><br />While they had it two things happened to my 1991 Johnson 40 hp engine. <br /><br />First, while on a plane it suddenly lost most of its power and would only run at a 1800-2000...
I'd like to better understand the principles behind adjusting the idle speed on my 1991 Johnson 40 hp motor. It will not idle with the fast idle lever down. Apparently, I have not achieved Zen with this motor. <br /><br />After reading the service manual, I've learned that the idle speed on...
I'm still looking for the reason my 1991 Johnson 40 hp won't idle. <br /><br />I can keep it running by keeping the fast idle lever up and pushing the primer every 2 or 3 seconds. I've tried richening the mixture and that seemed to work when I was running the engine on the muffs, but when I...
I'm rebuilding my carb again because I can't find any another reason for why my '91 40 hp Johnson won't idle. I want to do that rebuild as close to by-the-book as I possibly can. <br /><br />Is fingernail polish a substitute for gasoila? The OMC manual says to use gasoila to seal the core...
Why is it idling so low?<br /><br />From my search through past threads I can see that idle problems are very common. Ive read many of those and followed almost all the suggestions to try to find a solution to my own doesnt want to idle problem. So instead of boring you with everything...
I'm the new owner of a 1991 50 hp Johnson with electric start. The engine has clearly been well cared for although it was last run a year and a half ago. Apparently, the VRO isn't used (no external oil tank and the oil input has been sort of covered). So I mix the gas 50:1. <br /><br />The...
