Chainsaw Repair

first thing is, this is an insomiac reponse, so tread lightly.

sounds like the torque curve of the motor needs to come down in rpm, and the powerband needs to narrow up.

similar to this idea: http://www.epi-eng.com/aircraft_engine_products/ls_crate_engines.htm

maybe a smaller venturi carb, or better yet a smaller carb plus less intake port x-sectional area/duration may help?

compare the airplane optimal torque curve from the first link to page 19 of the second link here: http://www.vintagesnow.com/SledU_Folder/delivery_ratio-1.pdf

epoxy will be your friend.  don't know if rc folks do any of this?


regards
-joe


edit:  would help if i could spell and actually include the links