Pop the distributor cap and spin each engine over normally, the one that turns clockwise is the reverse-rotation engine. ----- Original Message ----- From: "Nico Over" <nover@xxxxxxxx> To: 1962to1965mopars@xxxxxxxxxx Sent: Sunday, December 13, 2009 4:17:04 PM GMT -05:00 US/Canada Eastern Subject: Calling all Mopar Boaters I just picked up a matched pair of 440 Mopar Marine engines with less than 100 hours on them since a complete rebuild. The guy who I got them from could not remember which is the right or backward running engine. My question is there any method to externally determine which engine is which without a complete tear down. Even with a tear down how do I tell, distributor gear? Thanks In advance Nico Over Va. Beach, Va. ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html. [Non-text portions of this message have been removed] ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.