Re: Engine locked up on Cub

Posted by Troy - MI on October 19, 2003 at 18:20:57 from (216.65.161.121):

In Reply to: Engine locked up on Cub posted by Tyler on October 18, 2003 at 22:07:28:

Last month I freed up an MD that I bought with a stuck piston. I soaked it for two months using every penetrant that I could think of (Kerosine, Diesel fuel, Marvel's Mystery Oil, Kroil, Vinegar, P.B. Blaster, Brake Fluid, Automatic Transmission Fluid, etc.).
I also heard that you could fill the cylinder with diesel fuel, ignite it, and let it burn out to warm the cylinder. Then hit the top of the piston with a wooden block. I tried that about six times per day each weekend for three weekends. The engine wouldn't budge.
Finally, I took a sparkplug and broke the ceramic housing off. I had a steel grease fitting welded to the broken end of the sparkplug. I used some JB weld to paste the valves to the inside of the head (to prevent grease leakage into the head). With the head off, I scooped grease into the stuck cylinder until it was filled to the top. Then I replaced the head and tightened it. I attached the modified sparkplug to the fitting. After about five pumps of the grease gun, I could feel the piston start to move. It took very little effort to pump the grease.
I believe that this method is quite safe as the grease tends to leak slightly past the piston and help lubricate the cylinder as the piston is pushed down.
Now the tractor runs very well. In fact, I just used it to brush-hog 5 acres this weekend. It sure is a good feeling to put an abandoned wreck back to work again! Good luck!

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