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Subject: 841 Powermaster Plug Wires

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Jerry    Posted 08-24-2020 at 21:01:15 [URL] [DELETE]        [Reply] [Email]  
  • 841 Powermaster Plug Wires
  • My tractor is running very rough, backfiring and stalling out after a tune-up consisting of points, condenser, plugs, distributor cap, rotor and new wires. I am afraid I may have the wires wrong. So, 1) are the cylinders numbered front to back 1 to 4? 2) Can you verify that the firing order on an 841 is 1-2-4-3? 3)Starting with the number 1 position marked on the distributor, should the wires go to cylinder 1, 2, 4, 3 IN A CLOCKWISE ROTATION FROM 1 OR COUNTER CLOCKWISE ROTATION FROM 1?

    If this is not what is causing the issue, I will go back through the installation process.

    Thanks for your assistance.

    jerry    Posted 08-25-2020 at 10:02:17 [URL] [DELETE]        [Reply] [Email]  
  • Re: 841 Powermaster Plug Wires
  • Tim, my rotor is rotating clockwise. Doesn't that mean that my plug wires should be installed beginning with the marked #1 hole on the cap to plug 1, and moving from there in a clockwise direction around the cap, with 2 hole to 2 plug, 3 hole to 4 plug and 4 hole to 3 plug?

    Points at .25 and plugs at .27. I did not do anything to timing as I don't have a timing light.

    Gaspump    Posted 08-25-2020 at 11:28:37 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 841 Powermaster Plug Wires
  • 1-2-4-3 firing order in a clockwise rotation is correct. Without a timing light with the pluga out you must find the timing marks and on number 0ne compression stroke set the timing mark at 8 degrees BTDC and the rotor pointing directly at number one wire on the cap. Just got through with this task on my 960. Timing marks are faint, a little rusty and in a position that is hard to see. Had to use a bore scope to see them well enough, hope yours are better. If it won't start advance or retard the distributor just a tad while cranking til it does, when it starts and warmed up check throttle response as well as idle smoothness. Beware as soon as it starts check your oil pressure. If no oil pressure likely you have lost the oil pump hex drive and you probably will have to remove the oil pan to find it. Hard to fine tune the timing without a light but if you are a pretty good mechanic it can be done.

    Jerry    Posted 08-25-2020 at 11:48:44 [URL] [DELETE]        [Reply] [Email]  
  • Re: 841 Powermaster Plug Wires
  • Thanks Gaspump. Mine will start but it sputters, pops and dies. I am not that great of a mechanic so I am going to pick up a cheap timing light at Harbor Freight. Part of the tune up cost I guess. I have 3 tractors and 4 vehicles and this is the only one that I will use the light on.

    Gaspump    Posted 08-25-2020 at 11:53:40 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 841 Powermaster Plug Wires
  • When you find a light likely it may be for 12V use. If so just hook it to a 12V source and it will work best. I use my lawn tractors battery.

    Tim Daley(MI)    Posted 08-25-2020 at 08:07:35 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 841 Powermaster Plug Wires
  • How did it run before all that? Points gapped at .025" +/- .001"? Plugs gapped at .027" +/- .001"? Firing Order on all FORD Tractors is 1, 2, 4, 3 CCW. #1 cylinder always at the front nearest radiator. After your tune-up, did you set the timing correctly with your timing light per manuals? Get out your Essential Manuals and go over it again. Verify all wiring, 6V or 12V, if not right can give you non-starting issues. Be sure generator or alternator has the correct fan belt and the unit has a belt tension device.



    Tim Daley(MI)

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