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#21
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If you used the gaskets over, good chance there is a leak.
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#22
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Switch
Never assume a switch is ok. My snowmobile was giving me hair raising fits last year, (which, by the way, ain't easy with a helmet on), was intermittently dropping a cylinder then start running fine again. I'd like to say simply because I'm a genius, (but I ain't much for lieing) I reached down and wiggled the ignition key while moving along at, oh, about warp factor 3.38, and sure enough cylinder dropped, came back, dropped again. New switch for me, problem gone. These are old machines, change it, if it ain't bad currently,,,, it will be eventually.
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1450SGT 1641 528 SWE Snowblower, |
#23
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Possible valve springs??
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#24
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If any of the valve springs were broke, it would miss all the time. I have yet to see one that's weak.
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#25
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Quote:
I can't really see a weak spring causing the issue that is being discussed on the lawnmower once the engine gets hot. I suppose if a spring is weak and a valve stem is binding slightly once the engine is warm, the two together could combine to produce a "lazy" valve effect.
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2072 w/60" Haban 982 with 3 pt and 60" Haban 1811 with ags and 50C 124 w/hydraulic lift 782 w/mounted sprayer 2284 w/54" mowing deck |
#26
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I know all about springs, John. I even have the tool to test them. I'm saying, I have yet to see a Kohler with a weak one. I've seen other motors with weak springs, but that kind of issue usually doesn't show up until higher RPM than these engines run.
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#27
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Thanks for being more clear, I was getting a little concerned!
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2072 w/60" Haban 982 with 3 pt and 60" Haban 1811 with ags and 50C 124 w/hydraulic lift 782 w/mounted sprayer 2284 w/54" mowing deck |
#28
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I've been busy with some other things lately and haven't had a chance to work on the tractor. Thanks for the comments; I'll be back working on it in a couple of weeks.
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#29
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A followup
Just thought I'd give a followup post about my 'perplexing problem' tractor.
So here we are a year since my last post on this subject, and several years after the problem first surfaced. I have been mowing with the Cub Cader 1862 all year and it has been running OK, and has not exhibited the issue with running really rough about every 5 - 10 minutes. So what made the difference? I'm not 100% sure, but I have been running it at a reduced RPM. The Hi idle on my tractor had been running just over 3000 RPM, and I arbitrarily lowered the RPM with the throttle lever to around 2500 RPM this year (checked with an electronic RPM sensor). I don't understand why that would make a difference, but it has. Perhaps the governor likes that RPM better? I had been thinking about getting rid of the tractor because it was so frustrating, but I guess it wants me to keep it around a little longer. |
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