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Restoration & Repair Tips Board

Re: carberator excess fuel found in air intake

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Author  [Modern View]

11-14-2017 15:27:17

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You don't have an excess fuel problem. Most of these old tractors have updraft carburetors as do my old Fords. If I have one that doesn't fire right up, I will pull the intake to make sure that I have gas. If I don't see at least a tablespoon worth, I know that I have a lack of gas problem. What happens is that the pistons suction is drawing the fuel up through the carburetor, manifold and into the cylinders. If the engine does not start, as soon as you release the start button. All of the gas that is in the manifold is not going into the motor, gravity is pulling it back down. This is a common non-problem and comes up regularly here. Check you plugs and evaluate your fuel situation at the cylinders where the fuel needs to get, to instead of where gravity brings it back to.

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1946 BN IHC

11-15-2017 04:37:36

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 Re: carberator excess fuel found in air intake in reply to showcrop, 11-14-2017 15:27:17  
Dear showcrop;
What I have is new NGK plugs, wires, & distributer parts and I have also, using an ohm volt meter continuity between the plug bace in the head and the ground post of the battery [posative ground] and a sharp blue spark when I take a plug out and ground it to a grounding point. It took my a while to achieve this since painting each piece separately caused an insulating effect and so I ran a 10 G grounding wire in the wiring harness to insuer each item had continuous ground ; lights and all other electrical components [disributer, engine block, generator.] Some times I wish I had someone close to go over this tractor with me step by step for I still have the uneasy feeling I have missed something small but critical / yet can't see what// ouch! This is the time I wish my father was still alive and capable since It was his tractor and he had also worked for an IHC dealer near Sarnia Ont. in the 50s and we lived on the home farm until the middle 60s,in the same area where we had lived. I live near London Ont. now.

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