handyman 1 #1 Posted April 11, 2009 I am going to look a 416 tomorrow that the seller states has an engine problem. He was told that there is a mechanism that allows the compression to be released when the engine cranks and then closes when fired. Apparently this is bad and needs replaced. I am not knowledgeable at all about this stuff. Is it something that can be fixed externally or an internal problem. Thanks. Share this post Link to post Share on other sites
zieg72 209 #2 Posted April 11, 2009 Never heard of such a item. Onan's suck valve seats and loose compression, almost always on the oil filter side and usually a costly fix. It is an internal problem. Share this post Link to post Share on other sites
Rollerman 290 #3 Posted April 11, 2009 Zieg not all 416's used Onans. http://www.wheelhorseforum.com/index.php?showtopic=9185 Handyman the Kohlers used a compression release that was tied into the Cam. Below a certain RPM it holds the exhaust valve up a little. To fix or replace the automatic compression release "ACR" you'd have to tear the engine down to access the cam itself. Share this post Link to post Share on other sites
