chev0545 236 #1 Posted October 4, 2015 is there a difference between a onan 16 & a onan 20 carb? can one be used on the other?thanks Share this post Link to post Share on other sites
Theroundhousernr 590 #2 Posted October 4, 2015 There is difference between the two. I believe mainly jetting but not sure. No, you can not swap them out directly. 1 Share this post Link to post Share on other sites
ericj 1,579 #3 Posted October 6, 2015 the 18 hp onan uses the cam and carb from the 16 hp and block, piston, and rods from a 20eric j Share this post Link to post Share on other sites
