My Super A does not run well under load. Spits and sputters, you have to keep one hand on the choke to keep it going. Checked the points, they were almost closed, opened them up to .025, that helped some but still does not run as good as I would like. Any suggestions on what to look for?
- Thread starter testanley
- Start date
old
Well-known Member
- Location
- Camdenton Missouri
Does it have an adjustable main jet or is it a fixed main jet?? If you can adjust it open it up a 1/4 turn at a time till you find the sweet spot. If it does not have an adjustment then t is time to do a carb rebuild.. Or you have a clogged fuel system. Pull the drain from the bottom of the carb and make sure you have a good steady flow of gas from there and go from there
I know it sounds crazy but twice a year I have to adjust the main jet on my F**d. When it gets cold I have to richen it up about a 1/2 a turn and when it gets hot I have to lean it back out. Didn't do it till all we could get is this oxygenated fuel. Regular fuel, no problem. Oxygenated ethanoled fuel, nothing but trouble on these older engines.
LarryT
LarryT
gene bender
Well-known Member
Get real and fix your problem we here in IOWA have been using the blended fuel for over 35 yrs now and the old tractors run just fine. I park em in the fall and they will start and run in the spring and have over the years. I buy the blended gas when i travel and just dont see the problem.
gene bender
Well-known Member
You need to start on the fix by taking a compression check then check the tappet for correct settings.Now some new spark plugs mite be in order along with good wires with copper centers. Check for leaks around the gaskets clogged aircleaner. Check the dist shaft for worn bushings one by one you will find the problem these are a few of what mite be wrong.
You need to check your fuel flow to the carburetor. Disconnect the gas line at the carburetor and see if there's a full stream of gas from gas from the tank. Hold a clean container to catch the gas. Could be dirt or rust or both blocking the fuel flow to your carb.
If there's a full stream of gas to your carb pull the fitting where your gas line connects and look fo a plugged screen behind that tube fitting. If it's clean you probably need to soak that carb in carb cleaner and blow out all the jets with compressed air. That carburetor doesn't have the main jet adjusting sc/rew to enrich the fuel mixture. Check your float level
to make it's set to the recommended setting. Hold your hand over the throat of the carburetor and see if there's good suction. If there's very little suction you have low intake manifold vacuum. Make sure your valves have enough clearance, check your intake manifold for leakage. Worn sleeves and rings plus valves not seating can cause low vacuum. Hal
If there's a full stream of gas to your carb pull the fitting where your gas line connects and look fo a plugged screen behind that tube fitting. If it's clean you probably need to soak that carb in carb cleaner and blow out all the jets with compressed air. That carburetor doesn't have the main jet adjusting sc/rew to enrich the fuel mixture. Check your float level
to make it's set to the recommended setting. Hold your hand over the throat of the carburetor and see if there's good suction. If there's very little suction you have low intake manifold vacuum. Make sure your valves have enough clearance, check your intake manifold for leakage. Worn sleeves and rings plus valves not seating can cause low vacuum. Hal
Janicholson
Well-known Member
If it is a point and coil ignition the gap is .020". If it is a mag, the gap is .013"
The breaker cam bushing could be worn and causing issues. Any side to side play will be not good.
I also think your basic issue is fuel flow, or a partially plugged up main jet.
Jim
The breaker cam bushing could be worn and causing issues. Any side to side play will be not good.
I also think your basic issue is fuel flow, or a partially plugged up main jet.
Jim
What altitude are you at Gene? I am thinking at this high altitude it may make a difference because I am not the only one with these older tractors with the problem If it was only me then I would say that there would be a reasonable fix. I have rebuilt and even had the carburetor flow checked and it didn't change a thing. I change plugs every fall and it gets a timing and points check at least twice a year. Since the engine was rebuilt 2 years ago the compression is over 130 dry so I don't see a valve problem or internal problem with the engine. So, If you have something constructive to help or steer me towards another reason for it behaving in this manner, please let me know. Thanks, LarryT
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