My Kohler 25-hp V twin started acting up this year (the engine is 13 years old and has only been used for my property, never for commercial use). The first time I started it up, it gave out a large blue smoke cloud that I thought dissipated until I set it to full throttle and began cutting the lawn. I looked back after the first pass and saw I had left quite a cloud. For the next few weeks, it has produced less blue smoke, but is consuming about 1/2 quart of oil after about 1.5 hours of work.
If I run the engine for just about 1 minute, and then remove the dipstick, there is a lot of smokey vapor in the crankcase.
Today, I removed the plugs and 1 looks great and the other does not.
I have to take quite a lot of parts off of the engine in order to remove the valve cover, so I can't easily put compressed air into each cylinder and see if I can hear any difference in how much air is leaking past the rings through the dipstick tube. I did a compression check and both were the same at about 170 psi.
Before I open up the engine or buy any parts, what are your immediate thoughts on what has failed?
If I run the engine for just about 1 minute, and then remove the dipstick, there is a lot of smokey vapor in the crankcase.
Today, I removed the plugs and 1 looks great and the other does not.
I have to take quite a lot of parts off of the engine in order to remove the valve cover, so I can't easily put compressed air into each cylinder and see if I can hear any difference in how much air is leaking past the rings through the dipstick tube. I did a compression check and both were the same at about 170 psi.
Before I open up the engine or buy any parts, what are your immediate thoughts on what has failed?