Kohler Command 23 diagnosis

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Pa was mowing his lawn the other day, its about 8" high and it was 90+ degrees out. He said it was working hard and suddenly started running on 1 1/2 cylinders. He drove it in the shed it shut it down. I took a peek at it yesterday. Oil looks good, air filter is OK. Started it up, lots of blue smoke and ran rough. Gave it full throttle and it eventually revved up, cleaned up, and ran OK for about 20 seconds, then got to missing and blue smoke again. 
If he scored a hole, how could it have run good for a short time? But on the other hand, if its an ignition or timing issue, how can that make blue smoke?

I guess a compression check would be a good start. Any other known issues or suggestions?

Thanks in advance.

Edited by littlemarv - 02 Jun 2018 at 8:37am

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littlemarv Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 10 Jun 2013 Location: Wisconsin Points: 1829	Post Options Post Reply Quote littlemarv Report Post Thanks(0) Quote Reply Topic: Kohler Command 23 diagnosis Posted: 02 Jun 2018 at 8:37am
	Pa was mowing his lawn the other day, its about 8" high and it was 90+ degrees out. He said it was working hard and suddenly started running on 1 1/2 cylinders. He drove it in the shed it shut it down. I took a peek at it yesterday. Oil looks good, air filter is OK. Started it up, lots of blue smoke and ran rough. Gave it full throttle and it eventually revved up, cleaned up, and ran OK for about 20 seconds, then got to missing and blue smoke again. If he scored a hole, how could it have run good for a short time? But on the other hand, if its an ignition or timing issue, how can that make blue smoke? I guess a compression check would be a good start. Any other known issues or suggestions? Thanks in advance. Edited by littlemarv - 02 Jun 2018 at 8:37am
	The mechanic always wins. B91131, WC23065, WD89101, CA29479, B1, Early B10, HB212, 416H

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HudCo Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 29 Jan 2013 Location: Plymouth Utah Points: 3539	Post Options Post Reply Quote HudCo Report Post Thanks(0) Quote Reply Posted: 02 Jun 2018 at 10:11am
	check the rocker arms and push rods , i have also seen a bunch of them start to bust off the crown of the pistons

Steve in NJ Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Andover, NJ Points: 11803	Post Options Post Reply Quote Steve in NJ Report Post Thanks(0) Quote Reply Posted: 02 Jun 2018 at 10:15am
	Read an article a few years ago about Ethenol in todays gasoline playing havoc with air and water cooled small engines. Makes the valves stick! First had that happen a few years ago with my HT Honda rider 2 cylinder. I use it for around the property pulling a large cart to clean up debris and branches etc. Was a hot summer day, full cart, headin' back to the compose pile and all of a sudden it was like you pulled a spark plug wire off of one cylinder. Farted, banged sputtered, running on one cylinder. Thought about that article I read and figured I'd toss some Seafoam in it as the article mentioned. Figured I got nothin' ta' loose. Turned out to be a stuck valve just like I read about. Our fuel around these parts has Ethenol in it. One of my Kohler Commands did the same thing last year. Seafoam took care of that one to! Damn crappy fuel!! HTH Steve@B&B
	39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife

IBWD MIke Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 08 Apr 2012 Location: Newton Ia. Points: 3732	Post Options Post Reply Quote IBWD MIke Report Post Thanks(0) Quote Reply Posted: 03 Jun 2018 at 9:20am
	It could be a fuel pump. Had it go out on my 782 CC last fall, was pumping gas right in the crankcase. Smoked like the devil and ran like crap!