I have an older B&S 18.5 ohv engine that had a couple of issues mainly camshft so while i was in there I decided to replace the rings because of low compression. the cylinder wall and piston were not scared up so i honed the cylinder for a few seconds cleaned everything put new rings in, new camshaft, tappets, new crankshaft seals, made sure oil slinger was good and new sump gasket. while head was off I took it apart and cleaned everything and made sure the valves closed good. Installed a new head gasket. Put it all back together and adjusted valves. Engine started and ran great but started to smoke so I went to muffler where it was coming from and could see the oil leaking out of the muffler. Took valve cover off and there was alot of oil in it. took head back off and there was not alot of oil in the cylinder. Put head back on and tried again. still pushing oil out the exhaust. Any ideas of problem? Thanks guys for any help.
(Update) (7-11) After several pieces of advice, I put everything back together and but I unhooked breather hose from the carb and started the engine. The muffler started smoking some after it ran a few seconds and began to ease off as the residue oil on it was burning off. I let it run a few minutes and idled it down every minute or so until it was at a low idle and it began to act up then cut off. Probably carb. But I checked the muffler and it was not leaking oil out of it like before. Checked oil level after a couple of minutes and it was at same mark as before it was run. So the pushing oil out of the muffler stop by pulling the breather valve hose off the carb. Question now is how to fix that so it works right? Thanks guys for the help so far. Engine---31N707-0301-B1,, MD- 090514ZA.
(Update) (7-11) After several pieces of advice, I put everything back together and but I unhooked breather hose from the carb and started the engine. The muffler started smoking some after it ran a few seconds and began to ease off as the residue oil on it was burning off. I let it run a few minutes and idled it down every minute or so until it was at a low idle and it began to act up then cut off. Probably carb. But I checked the muffler and it was not leaking oil out of it like before. Checked oil level after a couple of minutes and it was at same mark as before it was run. So the pushing oil out of the muffler stop by pulling the breather valve hose off the carb. Question now is how to fix that so it works right? Thanks guys for the help so far. Engine---31N707-0301-B1,, MD- 090514ZA.
Last edited: