(800) 853-2651
SHOP NOW

super c farmall starting

J

Jim Heaps

New User
I recently got a 51 super c and had to build the engine. I got it started but it seemed to starve for gas and would die out after about a minute. I took the zenith carb apart and cleaned it out, reset the float, ran wire thru all the jets and ports then cleaned with carb cleaner and air tested them all. Now it doesent seem to be getting any gas to the cylinders. Gas in the carb but not getting to the plugs. any ideas.
 
Hold your hand over the throat of the carburetor while a helper try's to start the engine. See if you have good suction on your hand. Poor suction means low intake manifold vacuum. You may have a manifold leak or your rings and sleeves are worn. Valves may not be seating. Do a compression check and see what the readings are. Did you check for a full stream of gas from the tank to the carburetor? Hold a clean container and catch the gas and dirt. If there's just a trickle your gas tank needs cleaning. If there's a full stream of gas remove the tube fitting where your gas line connects to the carb and look for a screen behind that fitting that may be plugged. Hal
 
I have already cleaned and red koted the tank and have good flow to the carb. The thing started easily until I removed and cleaned the carb, it just wouldn't keep running. I had the head worked when I rebuilt the engine.
 
Check that valve clearance. Set them at .017" cold. Make sure you don't have an intake manifold leak. Squirt some carburetor cleaner in that area between the head and intake manifold while a helper try's to start the engine. If the engine fires you have a leak. You may need to tighten the bolts or nuts. Hal
 
Thanks I will try that later today. Also do you know how much vac it is supposed to pull. I have vacuum guages.
 
You can check that valve timing by removing No1 sparkplug near the radiator and bringing that piston to TDC on the compression stroke. Hold your thumb over the plug hole while a helper hand cranks the engine until you feel pressure and once you feel pressure drop a long plastic straw on top of the piston. You watch the straw rise while your helper keeps cranking the engine slowly. Once the straw quits rising you should be at TDC on the compression stroke. Both valves should be closed. Remove the cap on the distributor or mag and see where rotor is pointing. Should be at the No1 plug tower. Hal
 
Jim, with the air hose between the carb and the air cleaner removed and the choke pulled completely closed, turn the motor over with the starter or a hand crank. You should get fuel just about running out of the air horn. If you don't, fuel is not getting from the carb's fuel bowl to the discharge nozzle or you have no vacuum (that's not likely).
 
You didn't happen to leave out the venturi? Spent the better part of one day puzzled. I missed the basket when placing the parts in the carburetor cleaner bucket and the venturi went into the bottom. Took it apart I don't remember how many times before I caught on that a part was missing. Without it you can not build enough vacuum on the feeder tube to draw gas thru the jets.
 
This thing sat up for a long time and when I got the valve job done I don't know if they ever removed the intake manifold. But the manifold gasket could very well be the problem. I will check this evening when I get home and let everyone know what I find.
 
didn't get a chance to work on it that much yesterday but did check compression and have about 90 on all. Now starter has quit so I have some work to do.
 
Valve timing was the issue I don't know how it happened but she was out 180. Thanks for all your input. Running good now except for some governor issues. Any ideas on adjustment of the Governor?
 
You must log in or register to reply here.

Similar threads

L
Super C Erratic Misfire
Replies
18
Views
398
Janicholson
Janicholson
E
Farmall C Starting Problem
Replies
6
Views
227
560Dennis
560Dennis
D
1963 Ford 4000 Gas carburetor trouble. Any suggestions??
2
Replies
27
Views
700
DLPinnix78
D
mdm1
cub lowboy no start
2
Replies
32
Views
1K
showcrop
showcrop
D
Farmall carburetor.
Replies
4
Views
367
used red MN
U
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top