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  #1  
Old 05-29-2013, 12:27 PM
machinehead323 machinehead323 is offline
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Default What happened to my K341-AQS? ETA now a K341 rebuild

I just started my 1650 and drove it only a bout 100 ft. it slowed down like it was out of fuel so i turned it back to the garage. i got it in position and there was a weird noise then the engine died. it turned over like there was no compression. i checked the oil and it was a little low and quite dark. i can spin the engine over by the driveshaft without any resistance. im pretty mechanically inclined and am also a machinist. i have never done small engine work though, except for taking them apart to see how they worked, ask my dad on that one. so where do i start. im guessing its pulling the head to see if the piston is even moving. i do see a valve moving though the carb and spark plug hole. what kinda advice can i get at this point?
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Old 05-29-2013, 12:45 PM
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cubs-n-bxrs cubs-n-bxrs is offline
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More than likely the weird noise was the rod breaking. Pull the head and see if the piston is moving up and down. Sounds to me like it's time for a rebuild.
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Old 05-29-2013, 02:00 PM
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cubby102 cubby102 is offline
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Yea sounds like the rod broke to me. But being and uch low rpm Im hopin for ya it didn't chew to much up. Mine broke at wot and it wasn't pretty
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Old 05-29-2013, 05:13 PM
machinehead323 machinehead323 is offline
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well i got the head off. the piston does not move at all. both valves do though. i pushed on the piston lightly and it went down smoothly, does not come back up though. well i guess i have to pull the whole motor and tear it down more. i have the kohler factory manual. i have never done this kinda thing before. i have messed alot with changing transmissions and intakes and such. never rebuilt a motor. i guess its all measurements and torques and such. any advise? im assuming the first thing i need to do is take some pieces apart and get some measurements of where i am at with the bore and if the crank survived. is there a good "how to" out there on this?
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1979 1650, #1 tiller with one extension, 90 degree box mounted, 3 point. 1961 4 digit bringing back to life. I have the mower and 3 pint for it. The 1650 is the fastest mower in the neighborhood.
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Old 05-29-2013, 05:45 PM
Maxwelhse Maxwelhse is offline
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The kohler manual is very comprehensive (with pictures) and should get you through your build with no problems. It's in the technical reference section.

My 149 pulled this same trick about 20 years ago (busted the oil dipper on the rod, then the rod eventually broke).. New rod, rings, and ball hone and she's been running great ever since!

Good luck!
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Old 05-29-2013, 08:20 PM
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dvogtvpe dvogtvpe is offline
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K series Kohlers have a notoriously weak rods and cranks. cranks wear out of round. clearance gets loose, starts pounding a little harder. dippers break off or the rod starts to gall to the crank, if kohler had gone with the same style Alcoa rod they used in the K361 and made a forged crank like the newer magnums have they would of had something special
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