no spark on WD

Billy_The_Kid · Jul 24, 2014

Running a fm x series mag. New points, plugs, New dist cap, rotor. Number 1 not firing. No. 4 fires most of time. Plug wires okay. And ideas??? Checked all cylinders with same plug wire. Any suggestions?

old · Jul 24, 2014

Send me an e-mail I I can then send you a manual for that mag that may help you

RalphWD45 · Jul 25, 2014

Old! It's good to see you back! You always were good to offer help, I see you still are! Cheers, Ralph.

Billpa · Jul 25, 2014

Billy , new cap doesn't rule out bad cap

Billy_The_Kid · Jul 25, 2014

(quoted from post at 09:28:05 07/25/14) Billy , new cap doesn't rule out bad cap

Roger that. I will run a continuity test on the cap tonight after work.

Billpa · Jul 25, 2014

Billy , let me know how you make out !!!

Billy_The_Kid · Jul 25, 2014

Billpa, I will post the results of my test tonight. But two different caps have the same problem with #1, so I'm thinking it's not really a cap issue.

A possible easy fix for this problem is switch out the magneto for a coil/distributor ignition I have. (See new thread I just started.)

old · Jul 25, 2014

Helping others and getting help when I need it is why I am on Y-T

tractorguy2 · Jul 25, 2014

You should replace your wires with new copper core
wires and use non resister spark plugs.

Billy_The_Kid · Jul 25, 2014

Tractorguy2, yes, already checked this possibility: one plug wire moved around the distributor cap with sparky grounded on frame. Good spark on #2, #3, some on #4, nothing on #1. Same good copper wire, same good spark plug. So it's definitely not the wire or the plug. As posted earlier, I will double check continuity of new distributor cap this evening. Assuming it's good, the problem HAS to be in the magneto.... Or as Stu ON has emailed me, #1 and #4 are on the same cam, so it could be a bad cam on the mag shaft. Lots of checking to still do.

Thanks,
Billy

Anonymous-0 · Jul 25, 2014

you put in new points but did you clean them Bob

Billy_The_Kid · Jul 26, 2014

(quoted from post at 09:54:28 07/25/14)

(quoted from post at 09:28:05 07/25/14) Billy , new cap doesn't rule out bad cap

Click to expand...

Roger that. I will run a continuity test on the cap tonight after work.

Continuity and ohm test indicate no problem with cap.

In searching old threads the mag only shuts spark to one cyl under rare circumstances. I am now leaning toward a points alignment issue. Any other thoughts welcome.

Billy_The_Kid · Jul 28, 2014

Getting back to everyone who helped me out. The problem turned out to be points that were not adjusted EXACTLY. They were approximately .28 instead of .20. Once I got the points gapped properly, it started running just fine.

The mag is producing lots of spark. After I got the points adjusted right, I held the #1 wire in my hand with spark plug grounded to the frame. WOOOOOOWWWW!!!!! My entire arm will attest to excellent spark! lol

no spark on WD

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