I just tried a new home made exhuast on my poulan 25 yesterday, and with a bit of playing about with the angle of the air into the bellmouth it now runs 8700 with an in cowl type exhuast on the std magneto and straight gas/oil mix. I hope to have anotehr engine by next week and I'll tune that one further, next stop 9000.


Rysium, to skim the bottom of the barrel I made a mandrel fr 20mm bar, put an M14x1.25 thread on with the lathe and screwed the head onto this mandrel using the plug hole. Make sure you check the squish (maybe you call it the deck clearance.?) with a bit of solder before running the engine just to be sure its okay.


Cheers,
Rich