Wheelhorse84 87 #1 Posted March 1, 2013 I took my old plugs out of my p216 and the electrodes had some white which I believe means its running lean. So I continued with the tune up plugs air and fuel filter gas valve in gas tank oil and filter change and carb clean. One of my questions is how much gas is suppose to fill in the fuel filter, cause I see very little? The onan seems to run great. Also what else can cause it to run lean? Does anyone have a diagram on this carb? I suppose I should run it with these new plugs for a bit to see if they so signs of running lean? Thanks in advance. Share this post Link to post Share on other sites
Rock farmer 41 #2 Posted March 1, 2013 That's just air in the filter. You can take the hose off of the carb side of the filter and let it fill up with gas if you like. But, it really doesn't make any difference. Joe Share this post Link to post Share on other sites
Wheelhorse84 87 #3 Posted March 1, 2013 Great thank you Share this post Link to post Share on other sites
mortie806 0 #4 Posted March 17, 2013 My filter on my 4-16 only fills about half way runs great Share this post Link to post Share on other sites
