text: does anyone have a service manual for a 1971 ski doo snowmobile? help!!!!? can i need some help with 1971 snowmobile, the stupid thing wont draw gas!!!!!!! its driving me crazy, and the kids want to ride it....the carb is fine and there is nothing in the exhaust, but if you blow air into gas tank it will run..... just strange. its been a while but there should be a line from the base of the engine to the carb. it uses suction from the motor to draw fuel to mthe carb. it may be cracked or dry rotted.also check fuel filter,and if its been sitting awhile u may need to rebuild carb.u should be able to get a manual from a ski-doo dealer. where do u live?