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Farmall & IHC Tractors Discussion Board

Re: Farmall 350U Ignition Problem


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Posted by JeffL on February 02, 2014 at 14:42:55 from (24.28.18.102):

In Reply to: Re: Farmall 350U Ignition Problem posted by JeffL on February 02, 2014 at 07:22:26:

It runs now.

In case others have similar issue. I did Jim's procedure to check the distributor low voltage (points, condenser, etc) and that was very helpful to see the little spark and know the power was moving trough the points as it should. we should all remember this, can save a lot of time and frustration. took 5 minutes or less. thanks so much.

then i tried hooking an extra spark plug on a plug wire directly to the coil high voltage (i.e. took out the center wire from cap). grounded the plug threads to a place on the block i know was good ground (can find a spot with a meter or a test light). i just held it on that spot but you could use some kind of wire. funny thing it took a lot of cranking but all of a sudden it started sparking a little, then a little more then a little more. the first spark it made was giant then they became normal.

then i put everything back being extra careful to make good contact on the wires; and checked each plug wire with the timing light just to see it flash about every half second or so evenly.

it still didn't even pop (and i know there was fuel), so i took all the plugs out and performed dead timing check. took me a bit to feel like the pressure in #1 cylinder was being felt when the timing marks lined up (was worried maybe valve timing had gotten messed up) but it turned out to be perfectly aligned. cylinder was TDC when the timing marks aligned and the rotor lined up with #1 on cap.

by this time the battery was dead. put my spare on (have been going back and forth between batteries helps to have a spare when having this kind of issue).

started up first try.

has fired up several times since first try.

so can't say for sure what the problem was. maybe if i had cleaned the points even though they are new not sure. seemed like it just needed to break in or something. just confidence in seeing each test yield some results led me to keep trying and the problem went away. funny thing checked timing after running and was perfect already.


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