I use purple cleaner like Castrol Super clean. Try a 50% ration, and if that doesn't cut it, go 100%. Might have to scrub some. Wear heavy rubber gloves if possible, and lots of ventilation. Try real hard not to get anything in the air cleaner. Might even pull the top off, cover the intake opening with plastic, and reinstall the cover, to keep water out. Make sure the oil cap is on good, and any engine ventilation lines are secure, along with the intake hose from the air cleaner.
Last edited by rodsatheart; 04-29-2017 at 07:51 AM.