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I appreciated your detailed response, but that last part wasn't warranted. Please stop.

You made a lot of assumptions there. You haven't talked to my customer. You didn't see the cylinder in person. The lighting in the photo made things look worse than it actually was. I don't appreciate your comment about bad Karma and you shouldn't be so rude. I don't know you personally and I...

Fair point. $2250 (engine + labor) versus $1500 - $2000. This math is one of the things I am struggling to sort out. This is a hard lesson for me to learn. Makes me want to do what I can to keep the final bill to $1500. I don't like the idea of failing to give the customer a good value for the...

Update... For what it is worth, I had two different experienced people look at it in person. Of course, they got to see the cylinder up close and personal and got to run their fingernail over the nicks. One of them was the guy at the local machine shop who I brought it to hoping they would bore...

slomo, It is a aluminum crankcase with a steel sleeve.

I started a small engine repair business and still have a long way to go to build up my knowledge and skills. I could use some experienced advice. One of my knowledge gaps is internal engine repairs. A customer brought me a Huster Rapter 54" zero turn with a Kawasaki FR691V engine. He said that...

I figure I will post an update, since I was on the site for another reason. All my parts are in, I plan on doing the work soon. I also googled 'kohler courage crack' to find what you were referring too. I checked my engine and didn't see any cracks (whew!), but there might be one I couldn't...

Will do. I took off the top cover to replace the magneto recently, i didnt notice that any looseness, but I will definitely check for a crack next time I am out there.

A couple more things so that this thread is hopefully as helpful as possible to other readers. Here is the gasket kit I purchased from Amazon...

@bertsmobile1 after stewing on things for a while, I watched some video of people replacing the gaskets on Kohler engines. Seemed simple enough, even more simple on a Kohler Courage (which is what I have). Then, I went out and took a closer look at the liquid on top of the muffler (took some...

Would a leaking exhaust gasket cause black smoke? Or would it simply result in smoke emission before going through the muffler? Also, how hard is it to replace the exhaust gasket and head gasket? I am kind of interested in doing the work as a learning experience. I have never disassembled an...

I have a troybilt 42" riding mower with. Kohler engine. The mower is old and I have replaced the carb on it about 4 times. This year, I decided to try my hand at soaking and cleaning the gummed up carb instead of buying a new one. I was able to get the engine to start very reliably, like a new...