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Hi All, I have removed the engine from my MTD Yardman mower to check the piston rings as I noticed a large "blow back" pressure ( my own term ) when I remove the oil dipstick when in use last summer. I also checked the compression when cold and remember it reading 55psi and 90 ish when warm. I...

Hi All, Just came across this site . Hopefully some forum members may have a machine similar to mine which is rare on this side of the Atlantic. My machine is an MTD Yardman, 136C561C643 and is mid 1990's. Never had any issues with it over the years until now. While replacing all the drive...