Re: 1984 Johnson V4 90hp
Okay, finally got a chance to hook up the muffs and run the motor for more than a few seconds. There appears to be a low speed miss, sounds like a lean sneeze. Cylinders 1, 2, 4 are running carbon black on the plugs (running double oil for break-in), but #3 is running wet. LOTS of spark, and I ruled out ignition by replacing coil, plug and powerpack on that side. Same problem. <br /><br />Would a lean condition on that carb at idle (never ran it about 1500-1800 in the driveway) cause the plug to end up wet? Motor seems to smooth out some at high idle - as high as I dared go without a load on it, almost like it was picking up the cylinder as the carbs entered mid-range jets.<br /><br />Am I correct in assuming that an issue with the trigger or stator would likely affect all four cylinders? I have extras of those, too, that I can swap in but they were a little harder to access as I was running out of daylight last night. And, like I said, spark appears excellent in an open air test - bright white/blue.<br /><br />Other than that, the motor sounds good. I'm going to replace the throttle/shift cables as they are a bit stiff.<br /><br />Thanks!<br />- Scott
To the uninitiated it'll look like a Johnson 90...<br /> It was a fun project. I've rebuilt a couple hundred motors over the years, but never a V4. Always have that tiny thread of apprehension when diving into something a little different. As your tagline says - use the manual. That was my first acquisition last Fall when I started the project - the OEM manual!<br />- Scott
