85 912H with K301 Kohler suddenly running terrible
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Garden Tractors
Forum Description: A great place to discuss the Simplicity and Allis Chalmers Garden Models
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=106831
Printed Date: 30 Jun 2025 at 8:52am
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Topic: 85 912H with K301 Kohler suddenly running terrible
Posted By: kenora
Subject: 85 912H with K301 Kohler suddenly running terrible
Date Posted: 28 May 2015 at 3:27pm
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I have had the tractor for about 20 years, it has always run well. I ran it this winter using the snow-blower about 20 hours and was cutting grass for about 2 hours this weekend (at full throttle the grass was wet and high)... when suddenly it began back firing through the carb and won't tolerate any load at all. I limped back to the garage and thinking I got a bit of garbage in the carb took it apart and cleaned it. I reset the idle and high speed screws at 2 turns out each but there was no improvement. The fuel is new, the plug is new.... When started from cold it idles nicely for about thirty seconds and then starts to burp and back fire, it can't take the load of moving without bucking and sounding awful. I have done what I can....any ideas? Thanks |
Replies:
Posted By: kenora
Date Posted: 28 May 2015 at 4:14pm
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Posted By: Jim Hancock
Date Posted: 29 May 2015 at 12:32am
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When was the last time that you changed the points and condensor? Or, the flywheel key is sheared ever so slightly to throw the timing off. That's the first thing that comes to my mind. Checking those things. HTH. Jim
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Posted By: Steve in NJ
Date Posted: 29 May 2015 at 6:17am
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Hmmmmm.... fuel is new. Possibly a bad batch of fuel sounds like to me to all of a sudden run lousy. I would drain the tank, and add fuel from another can or source and then give it a whirl again. Make sure you drain the carburetor. Couldn't hurt to add a dash of dry gas to it also just in case you got the bottom of some gas stations tanks... HTH ------------- 39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife |
Posted By: HudCo
Date Posted: 29 May 2015 at 8:53am
| replace the points and condesor change out the gas |
Posted By: kenora
Date Posted: 29 May 2015 at 12:51pm
| Thanks for the advise...the gas is changed already and I'll hunt down points and condenser....I priced the coil locally and it was $368.00 plus tax...OMG...I never priced the points and condenser cause I was on the floor!!! |
Posted By: kenora
Date Posted: 29 May 2015 at 1:33pm
| Found them on EBay for $37.00 Cdn shipped to my door...the local dealer wanted $60 plus tax... |
Posted By: HudCo
Date Posted: 29 May 2015 at 6:42pm
| wrong info there points4715003s napa store 12.00$ condensor230722 6.00% napa coil231281napa30.00$ hope this help all oem #s cross to napa parts |