Re: M farmall Starting Problems

Posted by Janicholson on October 05, 2005 at 06:48:28 from (199.17.6.175):

In Reply to: M farmall Starting Problems posted by Josh Johnson on October 04, 2005 at 18:52:16:

First item: is it a mag or dist./coil If it is a mag and the mag was partially disassembled while on the tractor, then the mag may get out of time internally.

If it is Dist./coil ignition, turning it with the cap off cannot possibly cause timing changes. there is nothing changing. The following assumes Dist./coil ign., and that the distributor has not been pulled out.

Set the points by turning the engine till the point rubbing block is on the very top of one of the lobes of the point cam. (.020)

As described put the engine on #1 tdc (front cyl) and align the crank timing marks.

With ign sw off, put an ohm meter between ground and the distributor terminal (nut and insulator) that gos to the coil. With the dist. mount bolts just loose enough to turn the dist. housing, rotate the dist. both ways. You will note the ohm meter changing from zero ohms to open circuit (full scale change). The points are opening and closing. Tighten the dist. retaining bolts just at that point when the meter changes to open circuit (infinite ohms). This sets the points to break at the exact moment the timing (on the crank) calls for it.

The rotor will now be pointing toward #1 cyl (no matter where it is pointing on the "clock" __note this position in your head. Place the rotor and cap on the dist. Note there may be a plastic dust partition under rotor. Poke the #1 wire in the noted hole, then #3 in the next hole in the direction of rotation, then #4, then #2.

Start the tractor (in neutral) and enjoy.

Good luck JimN

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