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Old 12-14-2018, 12:40 PM   #30
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Originally Posted by Kamper View Post
My 16 yo Yardmaster isn't throwing as hard as it used to. I ascribe that to worn rings reducing the actual horsepower. I spent $4-500 on it. I am putting it in mothballs now because i got a new one with better controls and a slightly larger motor this year.

It still starts right up though. Just time for something better. If the new ones were $1000 and up, I'd just do the ring job and keep it going.
My experience has taught me that a lack of power often indicates valve leakage.

It may be possible to lap the valves and regain past performance.

Lapping the valves is a simple task.

I'd bet that YouTube has plenty of video tutorials on the task.
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