Farm Equipment - Model G

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Model G

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=196169
Printed Date: 12 Nov 2025 at 10:03am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Model G

Posted By: acd17toy
Subject: Model G
Date Posted: 15 Jul 2023 at 6:12pm

My G sat for a couple of years,, started it and had two dead cylinders, new spark plugs and wires but still two dead cylinders, Did a compression test, dry 80 to 100 lbs, wet test 100 to 125lbs on each cylinder. What is the top compression on a new engine? What is the firing order of the engine?

Replies:

Posted By: JoeM(GA)
Date Posted: 15 Jul 2023 at 6:50pm

are you sure you are getting fire to those cylinders?

#1 is in the rear of tractor at the belt end
firing order is 1-3-4-2

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Allis Express North Georgia
41 WC,48 UC Cane,7-G's,
Ford 345C TLB

Posted By: acd17toy
Date Posted: 17 Jul 2023 at 6:13pm

Joe M [Ga]

Turns out that when I replaced the plug wires I got the firing order wrong, changed wires around to correct order fired up on all cylinders.

Posted By: JoeM(GA)
Date Posted: 17 Jul 2023 at 7:27pm

good deal!

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Allis Express North Georgia
41 WC,48 UC Cane,7-G's,
Ford 345C TLB

Posted By: Bill Long
Date Posted: 20 Jul 2023 at 3:04pm

Don't feel bad. Its a common mistake.

'Very unusual firing order

Good Luck!

Bill Long

Posted By: JoeM(GA)
Date Posted: 20 Jul 2023 at 3:22pm

Good to see ya on here Bill!

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Allis Express North Georgia
41 WC,48 UC Cane,7-G's,
Ford 345C TLB