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If the bearing is BAD you will know right away. If you don't feel any movement between the rod and crank then the bearing is not the cause of your compression issue, but it can still be worn, just not destroyed! When the machine shop pulls it apart to hone the cylinder they will be able to...

Although at this point it sounds like you will soon have the piston removed, so you will know shortly if you have a bad bearing. I'm still not convinced your rings and the cylinder walls are the whole problem. If it was the grooves I would expect air leakage all the time, not just at the bottom...

Did you ever get a chance to check for a spun rod bearing? It's pretty simple now that the head is off. just put it at TDC, go a tad beyond TDC but not enough to begin pulling the piston down, then push on the piston with your hand a see if it moves a little bit. Or get it at TDC and rock the...

I wouldn't bother. If it has always started easily in the past and now it doesn't even sputter with ether in it, not to mention hand cranking without releasing the decompression valve, why bother? Something is wrong internally. Just bite the bullet and take the head off, it will actually be...

Good thought, I have had to do that on my Lull a couple times when it was really cold out, but he already tried starting fluid and that wouldn't even sputter. These motors are so simple to take apart, I think we're closing in on tear down time.... One other question for Stone Burner... it sounds...

Before you get too discouraged and before tearing the motor down do 1 more thing.... So you say you have compression leaking at or near the bottom of the stroke, but not at the top, there is actually a good explanation for this. There are at least 3 factors that contribute to this: When the...

I had a similar issue on a 16D someone brought me to repair. It was running during a storm then died during the night. He was able to restart and ran another hour and died again. Now it would barely sputter a little. After checking everything possible I found that he was unaware the machine had...