Simplicity 4040 problems
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Garden Tractors
Forum Description: A great place to discuss the Simplicity and Allis Chalmers Garden Models
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=110278
Printed Date: 27 Apr 2024 at 10:38am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Simplicity 4040 problems
Posted By: 500592
Subject: Simplicity 4040 problems
Date Posted: 11 Aug 2015 at 10:18pm
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I've got a really clean simplicity 4040 with 16.5 hp on an engine hour meter shows 1400 hours. E have been fighting it for a long time it doest seem to have full power it always lugs down and dies. I can't seem to find a carb kit for it anywhere sandy lake only had a whole new carb. I've checked the points put on an electric fuel pump new coil and cleaned the carb numerous times but it seems like the Jets and internal parts of the carb are in need of a full rebuild wold that cause the lugging and dying? Any help would be appreciated.
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Replies:
Posted By: Steve in NJ
Date Posted: 12 Aug 2015 at 6:06am
How clean is the air filter in it? Air filters are overlooked a lot. We just forget about em'. When its lugging, any black smoke out the exhaust? If so, remove the air filter for a test and see how it runs without the air filter. If the air filter is new, the Carburetor air/fuel mix might need to be fattened up a little to compensate for the load put on the engine. Could be a lean issue. Spark plug inspection will help ID a problem to. Wet gassy plugs means to rich, or possible float problem or Carb issue. Sooty plugs, intake restriction or ignition problem. Oily plugs, oil control issue inside the engine. Crankcase vent problem, rings, guides etc. White plugs, lean condition. Plugs can tell ya a lot of info if you learn how to read em'.... HTH
Steve@B&B
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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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Posted By: farmtoybuilder
Date Posted: 12 Aug 2015 at 8:48am
Check compression also! At those hrs. most are worn out. I'm Not an Onnan engine fan! Put a Honda or other brand engine in it. Or a 3 cylinder Diesel!
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5 different TT-10's,5 TT-18's Terra Tigers,B-10,2 B-207's,B-110,2 B-112's,HB-112,B-210,B-212,HB212,2 Scamp's & Homilite T-10. Still hunting NICE HB-112 & anything Terra Tiger & Trailers for them.
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Posted By: Ages Cat
Date Posted: 13 Aug 2015 at 9:14pm
It sounds like it is starving for fuel.Fuel line or fuel tank outlet, or vent in fuel cap plugged.
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Curt Anderson
HD3, HD5B, HD6E, HD6AG,HD6B dozer, I-400, 615, 616,(2) 620, 720, ACP25 lift truck, 1956 D Special Grader, AC 540 loader, AC 655 crawler loader, AC #84 plow, Simplicity lawn tractors.
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Posted By: tadams(OH)
Date Posted: 18 Aug 2015 at 4:01pm
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Use fuel additive in the fuel. It will clean the carb out. Sounds like mine, after a few days it is running better. Tom
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Posted By: Chief Cockeye
Date Posted: 18 Jan 2016 at 9:10pm
I had a similar problem with my Simplicity 4040 when I first bought it (abt 1973). It ran great at idle, but had absolutely now power when put under a load. That was the reason the original owner sold it to me.
Turned out to be the bolts holding the carb to the intake manifold were loose, allowing the engine to suck air. Tightened the bolts and that turned out to be a GREAT tractor. I still have it and still use it. It is setting in my garage right now with the snow blade ready to plow any snow that comes along.
Good luck.
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Posted By: Bretz623
Date Posted: 18 Jan 2016 at 9:46pm
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I had similar issues related to timing.
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Posted By: HudCo
Date Posted: 19 Jan 2016 at 10:13am
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check the valve lash and do a leak down test. probley needs the valves adjusted and maybe lapped. get on top dead center on a piston and see if you have flywheel key sheared a few degrees, good idea to clean the carbon out of those haeds all of those will cause low power, low torque
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Posted By: Chief Cockeye
Date Posted: 19 Jan 2016 at 2:36pm
I just remembered I had a weird fuel line problem on a different motor that sounds a little like your problem.
The inner rubber liner on the fuel line had a 'flap' torn in it so that when fuel flowed thru the fuel line, the flap would close off the line just like a check-valve. The 'flap' was easily overlooked during a visual inspection of the fuel line because it stayed out of the way. Replacing the fuel line fixed my problem; but I never discovered the 'flap' until I tried to use that same fuel line on a different motor.
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Posted By: ac720nut
Date Posted: 09 Feb 2016 at 11:30am
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If you have original points box they have a tendancie to warp and are hard to keep points adjusted. Just my $.02
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