It’s generally accpected 2 stroke engines need at least 120 psi compression minimum to run. However, I saw a video on an old Johnson
outboard twin cylinder engines has 70 psi and runs great and the tester was accurate, he tested his chainsaw that made 150 psi. What determines the amount of compression that is required for a 2 stroke to run? How can one engine only need 70 psi where another needs 120 better ideally 150?
outboard twin cylinder engines has 70 psi and runs great and the tester was accurate, he tested his chainsaw that made 150 psi. What determines the amount of compression that is required for a 2 stroke to run? How can one engine only need 70 psi where another needs 120 better ideally 150?