Hand crank starting ,not happening.

[Waif]

Been trying different throttle settings.
Tried a warm engine and different choke settings.
Timing has the magneto pop right on the single timing mark on pulley. Engine tuned up last year with new components. New wiring harness too.
Magneto pops twice each revolution.
Starts alright with starter , though well worn starter kicks out a few times if cranking much.

Wondering if the tired old magneto is the culprit....

Had the battery die in the field last year and would like to be able to hand crank the tractor to life should it happen again.
Generator has been rebuilt since.

[inairam]

waif i can hand start my 49 with a mag. the timing has to be very good. i usualy use no choke with an ih carb and champion spark plugs. i find it is easy to flood the cub so less fuel at start is better.


did you do a full tune up with wires and distrubutor cap and adjust the valves? i would also put a timing light on it. i have had limited success with static timing the mag but others have had success. need a 12 volt source for the light if u r 6 volts

[Waif]

waif i can hand start my 49 with a mag. the timing has to be very good. i usualy use no choke with an ih carb and champion spark plugs. i find it is easy to flood the cub so less fuel at start is better.


did you do a full tune up with wires and distrubutor cap and adjust the valves? i would also put a timing light on it. i have had limited success with static timing the mag but others have had success. need a 12 volt source for the light if u r 6 volts

Cap,wires ,valves ,yup. No timing light to try but a good maybe down the road.

Flooded it a bit earlier today trying to hand crank it. Then noticed the switch off still....
Going to give the blisters a break and try more throttle ( and switch on) next time.

[inairam]

1/2 throttle at most. less fuel is better at start.

[tmays]

Check the points in the mag?

[Waif]

1/2 throttle at most. less fuel is better at start.

The operator station control arm is not accurate to it' s range , but tried a third of working throttle most times.
Easier to shut it off at desired range , than find it at start time.

[Waif]

Check the points in the mag?

The only things ( besides impulse coupling) that come to mind not involved in the tune up with several hours run time on it ...would be revisiting the the governor linkage adjustment to carb that I did before tune up, and if a touch control pump under load could interfere.

The cub runs nice . Tune up smoothed it out a bit more but it ran good ( and did not handstart) before either.

6volt ,no mods from stock configuration in ignition/ starting or charging arrangements.

[inairam]

you say it starts easy on the starter so not likely but electrical with the switch.?'

[SONNY]

The switch on a mag engine only grounds the mag to kill the engine.----You could unhook the wire at the mag and try,--- BUT I doubt that will help!----I don't think any of mine will hand crank,----never tried, ( physical problems prohibit radical stuff, like cranking engines!!! LOL!!!) thanks; sonny

[tmays]

I forget the air gap the mag should jump. Pull coil wire holding it close to ground and see if you get strong blue spark

[Glen]

Hi,
You could check it with a timing light to see where it is firing, Jim B. was saying that a magneto should be timed so the timing mark on the pulley is about 1/2 inch advanced from the timing pointer, when running at low idle speed.
If the timing is right, and you replaced the points and other tuneup parts, I would check the spark, it should be blue, yellow is weak. The magneto coil could be weak and need replacing. TM Tractor has a new coil.

[k hutchins]

I agree with Glen. Most likely a weak coil. I was running a dead battery on my '48 for over a year and had to hand crank it. Then when I needed it most it failed me. The coil was the culprit. Installed a new one, as well as a new battery, and all is well since then.
Hutch

[tmays]

If you find coil to be the problem, be sure to use copper core plug wires and that plug gap is correct. Also make sure spark from mag has a place to go when mag is turned over. You probably already do these things, but these will help make sure coil doesn't fail prematurely

[Waif]

you say it starts easy on the starter so not likely but electrical with the switch.?'

Starts fine using starter.

[Waif]

I forget the air gap the mag should jump. Pull coil wire holding it close to ground and see if you get strong blue spark

I have not tried that...will list it for next battle.