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Small Engines (Lawn Mowers, etc.)/Kohler Courage oil leaking from valve cover


Tom Lawson wrote at 2010-10-03 16:33:39
I am having the same problem with oil also getting into the carb. housing just ordered a new gasket. Tom-Ala

arrowboy wrote at 2012-05-05 17:08:03
I have the SV-590 19 hp Kohler and had the same problem.

Kohler has modified a newer valve cover with extra support on the bottom 3 bolt holes. Sold as a kit on a parts list. Mine was part # 20 096 14-S. Mine lasted 5 years before it began leaking.

bunny ear wrote at 2015-03-25 02:21:20
Above answer is all correct.. I'd like to add that I changed my oil before storing for winter (riding mower. I must've overfilled because the excess oil leaked from gasket onto muffler.  When I started it a ton of smoke came from engine- I thought I'd blown a head gasket.  

But just changed valve cover gasket - about 15 minutes and ran engine until all the oil burned off and no problems...

Small Engines (Lawn Mowers, etc.)

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Fred Hemmer


Lawn-Boy and Toro commercial and consumer equipment questions. Including: 2 cycle and 4 cycle engines,(gas or diesel), electrical troubleshooting, drive train questions (gear and hydro), quality of cut and chassis questions.


18 years with Toro and Lawn-Boy. Developed and conducted in-field training on engine, electrical and hydraulic components. Authored manuals concerning lawn and garden equipment. Worked with customers on the phone to resolve issues.

Engine and Equipment Training Council

Toro and Lawn-Boy web sites

BS in Business Admin Kolher, Kubota, Kawasaki, Tecumseh, Briggs and Stratton factory engine training Hydro-Gear training Various in-house training certificates

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