by Mr Mower Man » Thu Jan 17, 2019 12:40 pm
I have a Briggs engine in the shop that I have been servicing every year since it was new. It now has 60 hours on it. (44N677-0005-G1) Just doing an overall check, I noticed that there was a wet oil film on the carburetor bowl, fuel line in front of the carburetor, and on the heat shield on top of the exhaust pipes. There is absolutely no oil leakage from the usual spots (valve covers and PTO oil seal), and it's a very clean looking engine, except for this strange oil film up front. What might be causing this? I haven't done a crankcase vacuum test yet, but I wonder if any crankcase pressure might be forcing oil out somewhere (maybe the breather tube?). The only other place I can think of that oil might be leaking is the top crank seal, which I haven't seen yet. However, there is no evidence of oil running down the side of the block anywhere, as far as I can see. Any ideas?