Hi All,
Long story short my 15hp Jonson wasn't cooling properly so I pulled the head off to replace the thermostat (this motor is a pain in the ass to work on in that regard). I noticed a helicoil repair on the center-right head bolt (bought the motor used three years ago). No big deal, I...
The water that pumps through the motor gets too hot to touch. I recently tore down the water pump and the impellar was okay. Intact, but the blades were a little curled in so I ordered a new one. As I wait for it in the mail does this amount of frothy oil tell of more issues? Or simply just...
Hello,
The motor has great compression and spark. The carb is clean. It will idle and top out. The issue is unused fuel collecting around the carb and intake of the engine. It looks like carb blow back as well as a possible gasket leak where the reed plate attaches to the intake (very small...
I am unsure if this is normal or not. The motor shutters slightly at idle intermittently. I have a link to a video in hopes someone can lead me in the right direction of a diagnosis. The shutter happens at approx. 2 seconds and 5 seconds in the video.
Thanks!
My Johnson 9.5 runs perfectly except at 95-100% throttle. I am experiencing what I think is a little fuel starvation. Quick loss and regain of power intermittently at wide open throttle. It idles perfectly and runs smoothly at all other speeds. I want to specifically clean the high speed jet and...
I am trying to get my freshly rebuilt motor to run. I have great spark on both cylinders. I believe my carb is the culprit and needs some tweaking. I have read how to set the lean/rich adjustment knob. 1.5 turns out from gently seated. My question is does it look right? In the picture below I...
I am in the process of rebuilding at 1969 9.5. I wanted to gather your thoughts on the condition of the cylinders and what I should do to them if anything. Compression in both cylinders was 65 cold before tear down. Good compression for these is between 65 and 75, so we are good there. There is...
