Hi Captinjohn,

Thanks for your comments. I have also had to swap carbs in the "old days" as well. I used to prefer Kavan Carbs and have put them on Fox's and Super Tigers to get reliable operation.

The problem here is that some GMS .47 engines are just fine, others are a pain to get running reliably. This is what we are trying to isolate/fix. I think we are down to a fuel feed problem, and we have a fix by drilling the fuel intake nipple, brass insert and exhaust nipple - we just need to find which one is the fix and want some more testing to confirm.

Wish you had one, it would be great to have another troubleshooter. Thanks for your input.

Fly4Fun,

Wayne