Re: 1939 Ford 9N Tractor

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Posted by Bruce (VA) on May 17, 2017 at 20:37:26 [URL] [DELETE] :

In Reply to: Re: 1939 Ford 9N Tractor posted by Jim Mortensen on May 17, 2017 at 19:20:12:

" Checked the fuel from the tank to carb and don't think the fuel is the problem."

That's not how to check fuel flow.

Will the gas drain out of the carb bowl in a steady stream and fill a pint jar in less than 2 minutes? You need to answer that question before you move on to spark.

" When attempting to start, it almost starts....but the starter throws the bendix spring out."

It works like this......the bendix engages the ring gear on the flywheel & turns the engine over. When the engine speed exceeds the design speed of the bendix (because the engine is running) it disengages. (and I can never remember what RPM that is) What is happening in your engine is that 1 or 2 plugs fire, the engine momentarily exceeds the bendix disengage RPM.....and it disengages before you have all 4 firing.

And that's because of whatever problem you are having that's keeping it from starting. There's nothing wrong with your starter.

While you are waiting on your spark checker, put your battery on a charger. (see tip # 60)

You need a strong battery to:

1. Close the solenoid

2. Spin the starter

3. Engage the bendix

4. Provide voltage to the coil.

As the battery gets weaker, the first thing to fail is your spark. If the battery is almost totally dead, all you will hear is the solenoid clicking.

In addition to charging the battery, chances are you need new cables as well (tip # 41). And, don't forget to clean all the grounds, to include the mating area between the starter & the block.

The more current you use to spin the starter, the less you have for the ignition.

Post back w/ what the spark looks like.


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