Chainsaw Repair

another thing I have noticed and this is with saws like the 361 , if they were sold in this area they all are low compression with the thicker base gasket , if they came from up north where I'm from they were the higher compression with the thinner base gasket .

The higher the compression the more carefull the operator has to be on making sure he keeps the engine heat down .

Now back to dolmar , if you put a unlimited coil in it make sure to use lots of oil like 32-1 cause it going to turn alot of revs , 16,000 rpms  happens all the time with say a 20 inch bar , I have seen over 17,000 rpms on a woodported saw on a pipe and that was where it cut best at , One thing I have not seen yet on the 7900 is a crank go bad , I was playing with a 7900 on alcohol on muffler and was doing my cuts the the return spring on the 3120 carb broke so now the throttle is wide open , I got the top covers on the saw so no way to get at the carb, the off switch is not going to work in that state with the carb wide open cause the blade never came down after the run and now the plug  is glowing so in a split second I figured I wanted nothing to do with this problem so I threw the saw cause I figured the rod would be coming out to meet me  , it ran about 5 seconds on the ground before the flywheel came loose and she finally quit , I checked the crank and I see nothing wrong , it did not spin on the crank pin so not as bad as I thought , I'm sure 20,000 rpms were passed cause it sure was screaming