TonyI 2 #1 Posted June 4, 2023 My Magnum swallowed a screw.. so now am swapping it out for an Onan P220 from a 520. anybody have a guide on building an adapter to get the Onan running? there are lots of wire coming out of the Onan's Molex connector.. which ones do I need? Tony Share this post Link to post Share on other sites
lynnmor 7,704 #2 Posted June 4, 2023 (edited) You only need a few, white, yellow, red & lt blue. Some colors change across the connector, so trace them to the source on the engine. Edited June 4, 2023 by lynnmor Share this post Link to post Share on other sites
cleat 7,166 #3 Posted June 4, 2023 Even the white can just connect to the solenoid through an inline 30A fuse. Wheel horse 520H wire diagram.pdf You will need the ignition switch from the 520 as well as it is for battery ignition and your magnum is likely magneto ignition. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,388 #4 Posted June 4, 2023 The safety switch wiring for the ignition will require changes. 1 Share this post Link to post Share on other sites
