B Model - sputtering under load
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=53997
Printed Date: 18 Jul 2025 at 3:03pm
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Topic: B Model - sputtering under load
Posted By: Bill Myers
Subject: B Model - sputtering under load
Date Posted: 22 Jul 2012 at 3:38pm
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Good afternoon - I have a B Model that started sputtering when under the load of the finish mower. There was some dirt in the gas bowl which I cleaned and changed the fuel filter. I cut for about an hour this afternoon and it started sputtering again. Ran fine back to the barn, but each time I tried to engage the mower, it sputtered and nearly cut out. The gas bowl is still clean and the filter looks clean. Any ideas? Thanks, Bill
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Replies:
Posted By: Rod B
Date Posted: 22 Jul 2012 at 4:04pm
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Crud in the gas tank. Sounds like the engine is running out of fuel under load. Take the sediment bowl assembly out and clean the tank, check the line and double check the main jet in the carb allong with the other straight foreward things. ------------- for the money there is nothing better than provoking idiots and posers |
Posted By: Bill Myers
Date Posted: 22 Jul 2012 at 4:09pm
| Will do. Thanks! |
Posted By: ctbowles58
Date Posted: 22 Jul 2012 at 4:31pm
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As hot as it has been i SPUTTER under a load to. ------------- 190XT 2WD45 WF D15 D14 CA BIG10 302 & 303 bailers 77G rake 80R mower 6 plows and alot more |
Posted By: Rog(NCWI)
Date Posted: 22 Jul 2012 at 4:45pm
If you have a mag on your tractor, you may have a bad coil. I had similar problem and and found that the coil was bad on mine. 
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Posted By: EPALLIS
Date Posted: 22 Jul 2012 at 8:38pm
| I have a model B that does this also. Mine was fuel line related. If I was a gambling man, I'm sure yours is also. Going orange is going great! |
Posted By: Boogerowen
Date Posted: 22 Jul 2012 at 8:56pm
| Get your fuel system cleaned up and then listen to her purrrrr !!! |
Posted By: CTuckerNWIL
Date Posted: 22 Jul 2012 at 9:07pm
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If it starts to sputter, pull the choke out some and see what it does.This is a pretty simple test to see if it is a fuel problem or spark problem. If choking helps it, start checking for a fuel restriction everywhere from the tank to the carb. If choking it has no effect, start with a complete tune up of the ignition system. ------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: Hubert (Ga)engine7
Date Posted: 22 Jul 2012 at 9:08pm
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Bill, first off welcome to the Forum. What has been posted is good advice. Also you might want to invest in a fresh set of Autolite 295 plugs if yours have a bit of time on them. BTW you are too close to "Hotlanta" for this old country boy. Jackson County is getting a little crowded for me too. Got two B's - one waiting on brake installation; one parts donor that I may get running for a spare.
------------- Just an old country boy saved by the grace of God. |
Posted By: Mrgoodwrench
Date Posted: 22 Jul 2012 at 10:01pm
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my c recently started doing something like that. it turned out ot be a loose rocker arm lash adjuster. it only seemed smooth with no load, i soon realized i couldn't get full speed out of the motor at no load. yours probably not that, more than likely fuel, just some food for thought ------------- There are 3 ways to do job GOOD, FAST, CHEAP. YOU MAY CHOOSE 2. If its FAST & CHEAP it won't be GOOD, if it's GOOD & CHEAP it won't be FAST, and if its GOOD & FAST it won't be CHEAP!!!! |
Posted By: Steve in NJ
Date Posted: 23 Jul 2012 at 6:27am
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As "Tuck" mentioned, the choke trick works almost everytime if its a fuel delivery problem. When you pull the choke a little bit you cut the air to the engine and fatten the fuel mix. If the engine responds, its a fuel delivery or dirt or debris in the load side of the carburetor. Carb needs a roto-rooter....
mailto:Steve@B&B" rel="nofollow - Steve@B&B
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Posted By: Gerald J.
Date Posted: 23 Jul 2012 at 8:59am
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Look at the screen in the fuel line inlet adapter. I've seen it choke and engine to the point it would only run for a few seconds every 10 minutes. Gerald J. |
Posted By: JarrodACFan
Date Posted: 23 Jul 2012 at 9:55am
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My "CA" started doing that a while ago. I replaced the governor return spring and it ran fine afterward. Maybe try that. ------------- 1956 WD45 Narrow Front Factory Power Steering, 1953 WD Wide Front Allis Express in Muncie, IN |
Posted By: Bill Myers
Date Posted: 09 Aug 2012 at 7:17pm
| thanks for the good advice. flushed the gas tank, lines, etc. runs like it is 1952! great tractor. i grew up with farmalls and JDs, never had anything "orange" but sure will keep this one! |
Posted By: Bill Myers
Date Posted: 09 Aug 2012 at 7:21pm
| Hey Hubert - yep a little to close to the big city but not for much longer. Looks like your a ff or medic...thanks for your service! |