Re: Martin 75 Synco Twist

[jerry-ahrens]

I got my poppet valve o rings from Russ Larson, and they are very inexpensive. Get them from him so you get the right ones, that’s my opinion. When the o rings go bad, the motor won’t idle and can be hard to start. Also, be sure to put the valve back into the same position as it came out of, so don’t mix them up. After I replaced these in my 45, it purred like a kitten. That, along with freeing up some stuck rings.
One other word of advice on the poppet o rings, they will be hard as a rock from age. I carefully cut mine free with a razor blade. Avoid the temptation to pry them off, as you will damage the valve.