randyh 4 #1 Posted December 31, 2014 (edited) How much trouble is it transplanting 18 HP onan from JD to WH I bought a 518 H with a siezed engine thought about doing rebuild but dont know if it would be worth the trouble. While searching for a replacement engine I found an 18 HP that was in a JD> Edited December 31, 2014 by randyh Share this post Link to post Share on other sites
520HC 208 #2 Posted December 31, 2014 The Onan in the JD will have a 1" and 7/16 crankshaft . The WH is 1" and 1/8. Share this post Link to post Share on other sites
randyh 4 #4 Posted December 31, 2014 I had contacted the seller of the JD motor and that is what he said also. So the search goes on Share this post Link to post Share on other sites
