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9N Engine Problems

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Baffled Banker

01-31-2002 15:35:26

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Well winter is here and I tried to start my Ford 9N so that I could plow my driveway. The engine usually starts OK and I only have to hold the choke out for a few minutes and it runs well. Well much to my surprise the only way the engine will KEEP running is with full choke. Let the choke go and the engine dies this is after 10-15 minutes warm-up. Any ideas or help would be much appreciated. I am better at checkbooks than tractor work - but I learn fast. Thanks in advance

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Mark Hendershot

01-31-2002 19:32:45

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Re: 9N Engine Problems in reply to Baffled Banker , 01-31-2002 15:35:26

Hey since your better with the check book why don't you pay someone to do it for you and watch for learing experiance. I would pay sometimes if I could afford it, just that I am not good with the check book my wife keeps it. Mark H.

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ZANE

01-31-2002 19:04:35

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Re: 9N Engine Problems in reply to Baffled Banker , 01-31-2002 15:35:26

You obviously are not getting enough fuel mixed with the air going into the engine.

The most common reason would be a blocked filer or a clogged carburetor at the high speed jet orifice.

Put a basin under the carburetor and with the fuel turned on pull the 1/8" pipe plug from the bottom of the carburetor. If after about a full minute you still have a full flow of fuel out of the hole then you have a clogged carburetor. Remove it and clean it.Cleaning the N carburator.
If it is as cold as you say the problem may well be the presence of moisture in one or more places in the fuel system. Water likes to go to the bottom of gasoline and the bottom of the system is at the bottom of the carburator.You will never get it to run untill you get the carburator warm enough to melt the ice and get it out some way. The best thing to do is to take the carburator off and take it inside the shop and warm it up and then take it apart. Remove the big high speed jet needle from the front of the carb. It will be facing down and angled to the back slightly.
Be very cautious about the gas in a closed area and have no source of ignition so you don't set yourself of fire with the gas. The bottom of the bowl needs to be cleaned good and then blown out with compressed air. If you have the right tool to do it you need to remove the high speed fuel nozzle. That is the brass thing in the venturi (throat) of the intake that is pointing down and toward the front. It takes a long socket of the right size and don't try to get it out with a pair of pliers or you may get it so it can never be removed and cleaned. There will be several little holes in the jet that come into the bore from the sides and they all need to be opened with a needle of the right size. The best thing to use is a welders tip cleaner as it will have an assortment of different sizes and one will fit. Always use the biggest one you can get to go into the hole,

Be absolutely sure that the orifice in the bottom of the carburetor just below the point that the high speed needles sits when assembled is absolutely clean and free of all foreign material.

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TimK

01-31-2002 17:26:25

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Re: 9N Engine Problems in reply to Baffled Banker , 01-31-2002 15:35:26

I'll go with Dave and Danny on this one. It's an air leak somewhere between where the carb attaches and the engine. I suspicion that the reason it occurs after warm up is due to heat expansion expanding the hole or bad seal or ..... therby letting air in. You pull the choke then to compensate with more fuel to air mixture. When it cools off, hole closes and it's running ok until it again warms up. My $.02

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John, PA

01-31-2002 17:18:26

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Re: 9N Engine Problems in reply to Baffled Banker , 01-31-2002 15:35:26

Sounds to me that you have been using unleaded fuel in your tractor. I'll bet that if you spray some carb. cleaner into the carb., it will start running ok again. Unleaded fuel seems to clog up the jets and other parts of the carb. if it is allowed to sit to long without running. I'd take off the air tube and shoot some cleaner into the air-intake.

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terry

01-31-2002 16:42:24

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Re: 9N Engine Problems in reply to Baffled Banker , 01-31-2002 15:35:26

Actully it sounds like your not getting enough fuel, if it were the air filter clogging you would be flooding the engine and if this were the case you surely would not choke it to keep it running, there are three filters on the fuel system, one is in the tank you check it by unscrewing the sediment bowl valve out of the tank, the second is in the bowl valve you can check it by removing the bowl there is a screen up on the valve, the last is on the elbow in the carb. you have to unscrew it from the carb. to check it. Make sure you replace any missing filters as this is the only defense you have from dirt entering the carb.
If this does not help then you need to disassemble your carb. and check it for a dirty jet or mal adjusted float level or you may need to overhaul the carb.

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Danny in CO

01-31-2002 15:54:05

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Re: 9N Engine Problems in reply to Baffled Banker , 01-31-2002 15:35:26

Try taking the breather tube off and see if it runs better. If so, check the oil in the breather. You most likely need to change it to a 5W30 for winter.

Danny

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