Allis G no spark all new electrical parts
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=207325
Printed Date: 13 Jul 2025 at 12:01am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Allis G no spark all new electrical parts
Posted By: AC Dom
Subject: Allis G no spark all new electrical parts
Date Posted: 02 Jul 2025 at 10:26am
| A few years ago I bought some Allis G's from a potato farm in upstate NY. None were running but in dry storage 20 years. I chose the best looking one to get running. I replaced every single electrical component, and wiring. A few times the engine tried to start, and ran for about 2 seconds and died. So I attached a spark tester to one of the spark plugs, and as soon as the engine dies, the spark goes away immediately, giving me some confidence the problem is ignition. If it helps, when I pull the off/on switch out, which is starting position, the amp gauge moves a little into the negative zone. Please help if you have any suggestions.I farm alone and cannot keep spending hours and days into this project. |
Replies:
Posted By: dfwallis
Date Posted: 02 Jul 2025 at 11:29am
When the engine stops rotating, the spark will stop, regardless. Check that there is continuous battery voltage at the coil with the ignition switch on. Also, crank the engine even if it won't start and see if there's still spark (with ignition switch on). If you get a constant current draw with the switch in the on position, ignition is likely ok, but check at the coil itself (the battery side, not the distributor to coil side). ------------- 1952 CA13092 |
AC Dom wrote:Posted By: steve(ill)
Date Posted: 02 Jul 2025 at 12:21pm
|
run a jumper wire from the battery to the coil... this will bypass the switch and wires.. and put power to the coil CONSTANTLY. besides that, the POINT needs to be clean. sometimes there is a film / corrosion on the surface, even on new point that has set on the shelf forever.. If you have a new COIL, we can assume it is OK for now... If you do all the above and still no spark, consider changing the CONDENSER, next to the point.... make sure the point wire / condenser wire are not touching / grounding to the case. ------------- Like them all, but love the "B"s. |
Posted By: steve(ill)
Date Posted: 02 Jul 2025 at 12:24pm
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are your BATTERY and COIL both the same voltage ? 6V ... or now 12V ? ------------- Like them all, but love the "B"s. |