QuestionI bought a sears garden tractor in 2003 25 hp kohler model #cv730 type number 0017. It has been trouble since, needed new head gasket 2007, piston ring broke in 2010 ,replaced engine in 2010 . now it is burning oil at an alarming rate . what can I do if anything.
AnswerEngine service manual link:
http://www.kohlerengines.com/onlinecatalog/pdf/sm_24_690_07.pdf
Engine Uses Excessive Amount of Oil
● Loose or improperly torqued fasteners.
● Blown head gasket/overheated.
● Breather reed broken.
● Clogged, broken, or inoperative crankcase breather.
● Crankcase overfi lled.
● Incorrect oil viscosity/type.
● Worn cylinder bore.
● Worn or broken piston rings.
● Worn valve stems/valve guides.
I would start by making sure the oil weight is correct. Next, remove, clean, and check the breather as described in the manual. Check the dipstick o-ring and any other gaskets and o-rings for leaking. Often times dirt and oil will collect near a leaking gasket or o-ring. A leak can cause a loss of crankcase vacuum.
If you have access to a leakdown tester I would test the engine to see how the internal components are sealing.
Eric
