Hi Waco Driver,

I have attached a long piece of fuel tube to my carb input nipple, then blocked both the exhaust port and carb throat and blown into the fuel tubing to check for front bearing leaks. There was a little air escaping, but very little. Since I have both an older and newer GMS .47 (the newer one runs great) I compared the two and both leaked air about the same.

Since sealing the carb and enlarging the carb input and exhaust nipple, my "bad" engine runs fine now without the extra exhaust baffles.

I noticed we live fairly close together, and since we have 3 GMS's between us, perhaps we could do some comparisons. Send me a PM if your interested in getting together.

Thanks for your input, I look forward to your findings.

Fly4Fun,

Wayne Miller