Farm Equipment - Allis G Engine Problems

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Allis G Engine Problems

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=44624
Printed Date: 12 Sep 2025 at 6:12am
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Topic: Allis G Engine Problems

Posted By: Prairierth
Subject: Allis G Engine Problems
Date Posted: 28 Jan 2012 at 10:31pm

Hello all. I have been getting some help working on my G this winter from a neighbor who farmed with Allis' many years back, not a G specifically though. Anyway, we have been having a lot of problems with it sounding like it was missing at an idle. He rebuilt the carb and installed a new float. All the plugs seem to be getting a spark, as we run the throttle higher it seems to get a little better but doesn't necessarily sound perfect yet. I know it is a shot in the dark and the description is pretty vague but any suggestions?

Replies:

Posted By: Chalmersbob
Date Posted: 28 Jan 2012 at 10:59pm

Did you change spark plugs or wires? Check points. I would start there. No resistor plugs or wires. Carb doesn't usually cause a miss. You could check the manifold for leaks. spray it with brake cleaner when it is running to see if rhe engine speeds up. Bob

Posted By: ibleedorange
Date Posted: 29 Jan 2012 at 4:24pm

I have the same problem with one of my G's. Did not check the manifold, but will now.

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Posted By: Tony.Or
Date Posted: 29 Jan 2012 at 4:37pm

Check to see if dist shaft is sloppy, that will give ya fits. if points are bouncing around . Tony

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Posted By: CTuckerNWIL
Date Posted: 29 Jan 2012 at 4:46pm

Maybe out of time a bit?I would check for vacuum leaks and then look at the timing.

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Posted By: Don(MI)
Date Posted: 29 Jan 2012 at 5:55pm

If your electric is ok, are you sure your getting enough gas through to the carb?

Just took the tank off our G today, blew air back through cause she was a little plugged at the bottom of the tank where the shut off valve is. Much better now, also cleaned sediment bowl and carb.

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