Not to thread hijack, but I will say this on my acme 10hp aln330. Runs smoothly once started. Compression feels and sounds normal when turning. I drained last fall's gas and put in ethanol free 91 octane. I cleaned and blew out the carb with degreaser, soaked parts in alcohol 24 hrs, blew everything well with compressed air, put in a new plug and verified good spark, but it is has just gotten very hard to start. Too hard to rope start, so that's why I'm using the cordless drill. I have to choke it full to get it to start firing, then take the choke barely on or even just off to actually get it to sustain combustion. It also stalls if I set the gas on the lower range of the handle lever adjustment. Wonder if it's a gas flow issue when starting, but once it starts going it's able to keep feeding enough gas? Was a 2-3 pulls rope starter when I got it just last fall but this season it's a beast to start. started out the season starting ok but just degraded to where I can't realistically rope pull start it. and the weird thing is that it runs strong and smoothly once started, rototilling 8 inches deep 30 inches wide on the 10hp gas, only once or twice when it really started digging deeper than normal (and the machine and wheels sinking into the ground) did it get close to stalling from load issues.