i know this should be in the engine forum and thats ok if its moved as long as im informed, but i was just wondering. i recently took off my pull start on my fantom .15 and put a normal backplate on it. the other day i was looking at a manual to a motor for some odd reason and i noticed a gaskit between the backplate and crankcase. my engine doesnt have one, nor do i remember seeing one when i took off the pull start. am i supposed to have one on there? thanks.