Marvel-Shebler 154 Help Needed
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=140642
Printed Date: 31 Dec 2025 at 9:35am
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Topic: Marvel-Shebler 154 Help Needed
Posted By: KenBWisc
Subject: Marvel-Shebler 154 Help Needed
Date Posted: 21 Jul 2017 at 10:14am
The B started acting like it was running out of fuel. Blew out and flushed with carb cleaner. All passages are open but don't now about restrictions? Replaced the main jet and needle and now the float. It now runs well only when the choke is closed about 1/3. All guidance appreciated!
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'34 WC #629, '49 G, '49 B, '49 WD, '62 D-19, '38 All Crop 60 and still hunting!
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Replies:
Posted By: Bull
Date Posted: 24 Jul 2017 at 8:16am
Same exact story on the Zenith on my 37 WC
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WD45 Diesel, RC,CA,IB, B, G, 616, Early B-10, D-10, Terra Tiger, 95G spreader, SC blade
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Posted By: dawntreader74
Date Posted: 24 Jul 2017 at 10:07am
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sure it's not blocked up at the tank' somewear?
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Posted By: Bull
Date Posted: 24 Jul 2017 at 9:06pm
Mine has good flow to the carb.
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WD45 Diesel, RC,CA,IB, B, G, 616, Early B-10, D-10, Terra Tiger, 95G spreader, SC blade
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Posted By: Steve in NJ
Date Posted: 24 Jul 2017 at 9:55pm
One word. DIRT. Usually, when you have to close the choke blade to "fatten" the mix, you have a restriction in the idle circuit. Dirt or debris is jammed or clogged in one of the idle circuit passages, so the engine isn't fed fuel. Closing off the air coming into the Carb makes fuel pull from the enrichment circuit which feeds fuel to the engine, which "balances" the air/fuel mix and the engine smooths out and runs. Open the choke, the engine goes dead lean, shakes, rattles & dies. When I rebuild our customer's Carburetors, the only way I know to get that blockage out is glassbead the Carburetor, and then run a wire and brushes though the passages to make sure all passages are clear. We offer rebuilding services if interested...
Steve@B&B
bb-customcircuits.com
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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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