WC Starting problems - take 3

Tom RS · Jan 19, 2020

Hi Guys
Had the mag serviced and had great spark when picked up.
Installed and still no pop.
So I'm going to replace the plug wires as they are old.
So do I need solid wire wires? I noticed there is a universal set on YT's list but it says for high performance electronic ignition.
What type of wires should I get?

shaun wallace · Jan 19, 2020

You need copper or stainless wire and non resistor plugs.

Steve@Advance · Jan 19, 2020

It needs solid wire, not carbon resistor, not spiral core, just plain wire.

Did you check for spark at the cap and coil?

If there is a kill wire, try disconnecting it.

Were the plugs run with a weak mag or bad wires? Might replace them just to say you did. They can look good and cause grief.

NIK OWEN · Jan 19, 2020

LEAVE THE MAG KILL WIRE UNHOOKED...TRY...BE BLESSED, GRATEFUL, PREPARED...

Loren in Iowa · Jan 19, 2020

Doubtful that all four wires went bad at the same time. Do some diagnosis before you start throwing parts at it.

Bob · Jan 19, 2020

(quoted from post at 20:31:04 01/19/20) Hi Guys
Had the mag serviced and had great spark when picked up.
Installed and still no pop.
So I'm going to replace the plug wires as they are old.
So do I need solid wire wires? I noticed there is a universal set on YT's list but it says for high performance electronic ignition.
What type of wires should I get?

Even if your original solid stranded wire core spark plug wires are getting an bit "long in the tooth" that is not the reason your engine makes no attempt to start.

Is mag timed correctly?

Does engine have good compression on all cylinders?

Is the carburetor in good condition, and providing a proper gasoline and air mixture?

Dean · Jan 20, 2020

Electric starting or hand cranking?

If hand cranking, the impulse must work properly. Does it snap as it should?

Dean

Tom RS · Jan 20, 2020

Yes - I should have stated - this is a crank start only tractor.

And yes the impulse mechanism was checked and its working as it should. In fact I banged up a couple knuckles spinning it myself when it was off the tractor. So it snaps over really well.

jimtrs · Jan 20, 2020

(quoted from post at 23:22:44 01/19/20)
Do some diagnosis before you start throwing parts at it.

Best advice ever.

Be a mechanic, not just a parts changer.

From (I believe) Bruce (VA) on the 9N, 2N, 8N board on this site:

There are two schools of thought to try and get a non-running tractor to start
The first is to just start replacing every part you can get to until it starts, or you run out of money.
The second is to take a step-by-step approach to solving the problem, working from most likely to least likely. The key to fixing tractors (or trouble-shooting any piece of equipment) is to be systematic about it. You need to isolate the problem step by step, and work from the most likely reason to the least likely reason.

Best thing I found about following that advice, the "Most Likely" reasons more times than not, turn out to be the easiest and least expensive!

If you need help diagnosing, just ask.

Janicholson · Jan 20, 2020

Firing order is 1243 (not the common order, but reality. Make sure the rotor is pointing to #1 when #1 is at TDC compression. Then follow the order in sequence.
Allis Chalmers WC point gap.020 Plug gap .030 mark location Flywheel static timing TDC firing order 1-2-4-3 Intake and exhaust valve gap .010H .010H Make sure the order goes in the direction of the rotor. Jim

WC Starting problems - take 3

Tom RS

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shaun wallace

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Steve@Advance

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NIK OWEN

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Loren in Iowa

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Bob

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Dean

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Tom RS

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jimtrs

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Janicholson

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