Won't start day3

Hi Troy, I don't have an old mag around here anymore to take a picture of the cap. I have a sketch showing how your plug wires should be connected on the cap as you face it. When you are installing your plug wires connect No1 as shown on the cap and to No1 sparkplug near the radiator. Then do No2 as in the sketch and connect to No2 plug. Then do No4 and then No3.
Your engine should start then. Hal

Both tractors have identical wiring for CW, so is rotation the problem.??

Recap.. Valves closed. No.1 on TDC. flywheel lined up. Spark at plug.
Change marks on Magneto.
Further reading your post.You say the plug fired.then saw the firing mark,passed that and lined it up with centre.Your engine should fire at ? degrees BEFORE TDC,you now appear to be out by that number of degrees and firing AFTER TDC.
Loss of power.

Check valve gap. closed on 1 with 4 rocking gap 1 3 ' 2 ' ' 3 4 ' 1 ' ' 4 2 ' 3 ' ' 2

Comparing your photo to the one a little further down, it appears that you have one that fires four times per revolution, i.e, the rotor is connected directly to the input shaft and the center of the distributor lines up directly with the input shaft. In these magnetos the rotor turns in the same direction as the input shaft, which would also be consistent with your rotor turning counterclockwise looking at it from the rear.

The other picture shows one that fires twice per revolution, and the center of the distributor portion is offset from the input shaft because of the gears between the input shaft and the distributor rotor. In this style, the rotor also turns in the opposite direction of the input shaft, i.e, clockwise looking at it from the rear, and the rotor makes one complete revolution for every two revolutions of the input shaft.

In either case, the rotor should turn at 1/2 the speed of the crankshaft, or one complete turn of the crank should result in one half turn of the distributor rotor in the magneto. Pull the distributor cap off & check.

Realize this might be a shot in the dark, but given how much effort you've put into this just about anything is worthwhile checking.

Keith

Keith

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Take out the #1 spark plug, turn the engine over until #1 comes up on compression. The impluse on the magneto should trip at or just after top dead center as determined by the "center" timing mark (the magneto will automatically advance the spark once the engine starts). Stop at the point where the impluse trips, and take the distributor cap off the magneto. The rotor should be pointing at the position for the #1 cylinder. You can repeat the process for the other three cylinders if you want to verify that the wires are in the right order.

If the impluse doesn"t trip at or a little after TDC, or the rotor is pointing to the wrong cylinder, remove the magneto, turn the gear until the rotor points in the right direction, and re-install it. Repeat the above check for fire at or just after TDC on number one. You may then have to adjust one or two teeth to make the impulse trip at the right time. Fine adjustments are made by loosening the bolts through the mounting slots and rotating thewhole magneto a little bit.

Don"t set the magneto to make the impulse trip at the "spark" mark...that"s where its supposed to fire when its running, and the magneto will automatically advance the spark when the engine comes up to speed (actually, the impulse mechanism retards the spark for cranking). If you set the magneto timing too early, the engine will kick back & break your arm if you"re cranking, or do all sorts of nasty things to the starter if it"s got electric start.

Keith