Re: ’83 15hp, no power at top end

[jerry-ahrens]

I worked on a 20 Johnson that acted like that. I ended up finding that it had the wrong high speed jet…. apparently someone had been into the carb before me and had it all screwed up. I also seem to recall that someone had installed a piece of lead shot into one of the passages [the ones visible on the exterior of the carb] and had it plugged. You may need to trace out each passage using carburetor cleaner with the extension tube, or using alcohol and a syringe. Like my old instructor used to say, ” knowing each passage way in the carburetor and understanding fuel and air flow, is the key to a good repair”. Anyway, I’m sure you know all of this but just an idea…