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Old 08-09-2013, 09:05 PM
msportbiker6666 msportbiker6666 is offline
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kohler ch25 governor issues

recently did head work to one side and when i reassembled her she is slow to come back up to full song when i engage the blades. also loses rpms when i use hydros. compression is 175 and 170 with new plugs. starts and idles fine in high and low. I don't have a tach, but id guess high idle is between 34-3700. ive maxed high throttle adj. screw and pulled cable under clamp. ive tried 3 of the 4 holes on the arm, haven't tried hole closest to shaft, relatively no change. gov arm adjusted correctly, while attached to carb I loosened gov arm pinch screw and rotated shaft counter clockwise while holding gov arm at full throttle then tightened pinch bolt. curiosly, service manual says rotate shaft clockwise but that wouldn't work. the two pics are of low throttle and high throttle.

also any ideas for a homemade tach?
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Old 08-09-2013, 09:24 PM
msportbiker6666 msportbiker6666 is offline
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update: handy spark checker shows no spark on one side...
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Old 08-09-2013, 09:38 PM
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Restrorob Restrorob is offline
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My manual does state to rotate the gov shaft counterclockwise, Replace that stretched governor spring and put it in the second hole from the end of the lever....... Then set your high speed RPM's.......
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Old 08-09-2013, 10:27 PM
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piston slapper piston slapper is offline
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Ditto RestroRob...that governor spring is junk...and its installed backwards...
Ya might want to install the metal covers back on the heads...wouldn't want the engine to overheat..
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Old 08-09-2013, 10:53 PM
msportbiker6666 msportbiker6666 is offline
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ill order up new spring. covers werent on motor when i got it but will def check ebay. turns out i left a wire on coil pack unplugged. i guess thats why i dont get paid to wrench. also which multitester do u guys recommend? will frequency allow to check rpm? and do u think true rms is needed?
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Old 08-10-2013, 05:30 AM
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Restrorob Restrorob is offline
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Cheapest tach with free freight...... I've used one for over 20 years among others ; https://www.briggsandstratton.com/us...ts/?part=19200 ........ Description; http://www.manddsmallengine.com/briggs/tools/19200.html
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Old 08-10-2013, 03:18 PM
Bashby Bashby is offline
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I got a tiny tach knock off from amazon.com. I think it was 19.99 shipped.
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