I know you and I have discussed this a few times Norm, but I wonder whether they require at least a minimum compression to run. I know they run on minimal compression but perhaps the Powertorques in question don't quite have enough to run. I'm not sure where I saw it (it may have been the Victa manual) but I read they require minimum of 70 or so PSI. You and I have got them to run on less than that but I guess there's a bottom point to it. If it doesn't start with starter fluid, it has to be compression unless somehow the spark is compromised inside the combustion chamber. If you fit new rings and hone the bore and it still doesn't start I'd question the compression. You can borrow my compression gauge if it helps (if you don't have one already). Anyway I'll follow this thread as I'm interested in the outcome.
