I tried to start the D6 today to break up ice in the driveway. No spark. So I removed the mag and took it to the garage to check. Filed points and reset gap, sparks fine now. Timed mag on the bench. Went back out to time pony engine and while turning the flywheel, I hear a clunk. The mag drive gear fell off its shaft.
Does anyone know how to get the mag drive gear back in time with the crankshaft, short of removing the pony to remove the timing gear cover?

Thanks in advance,

Chuck

Yah, that happens,
Just put it back aligning the "M" on the idler gear with the "M" on the mag drive gear.

Hi Team,
sometimes the older 318's did not have the "M" marks on the mag drive tang or drive coupling so the scans below should get you there.
Cheers,
Eddie B.

"Old wrote:

Yah, that happens,
Just put it back aligning the "M" on the idler gear with the "M" on the mag drive gear.

Thanks OM, I tried that a couple of times and could not get the engine to run. In my parts book the crank gear is 18T and the idler is 44T and the mag drive gear is 18T. With this combination it is possible to align the "M" marks while the "I" marks are nowhere near each other causing the mag spark at the wrong time.

Yes, there probably is more than one position where the "M" will come around but if you use the combination of info that edb posted where the flywheel timing mark is correct for #1, the rotor is in the right position, the impulse coupling aligned as well as the "M" matched that will be the correct position.

Chuck, you have a hunting gear set there. 18/44 so the letters will not always line up on the idler gear. I suspect you will need the engine on TDC#1 and mesh the mag gear letter'd tooth with the idler.
Later Bob

Thanks OM, Eddie and Bob. I got the old girl running today. It never occured to me to time the engine, time the mag, and then set the mag drive gear to match the mag impulse coupling regardless of the gear timing marks. Thanks again for your patience and advice.

Chuck

I have been FIGHTING with my dozer for the past three years now, yes three years mostly out of frustration. Everything was working fine, and after sitting for a month I went out to start it with no luck, after playing around for quite a while it turned out it was some kind of magneto issue so I had it rebuilt at a cost of $400. I went to start it up and everything worked fine until the carburetor plugged up with cork, now I have gone through the carburetor and I went to start it and it would run on only one cylinder but at least it was running. I took the magneto back and they replaced several items on it just in case, but now it won’t fire at all even though I have spark, backfiring is all I can get. After many times back-and-forth to the shop they’ve done everything they can do and it’s something that’s on my end. Today, after reading this post I decided to check the timing, while it’s pretty difficult to find TDC because you cannot see the piston, (I’m guessing that number one cylinder is on the right hand of the machine, but that’s not mark either) I noticed the M on the gear did not mesh with the other gear. I thought maybe one of the times I took off the magneto it slid out and got out of time which would explain a lot, (nothing but backfiring)
I need someone to help me go through the procedure of timing this since I have moved the gear so they mash but I still have it not running correctly. Thank you in advance for your help

[ATTACH=CONFIG]86705

Hi,
can understand your frustration BUT, could we all Please post on one thread as it cheeses people off trying to answer every where else on the BB.
Others often answer queries on another post, someone else spends time scanning pix and data that has already been posted elsewhere.
Regards,
Eddie B.

[I don’t understand, because it is a completely related issue. Finding things on this site isn’t exactly easy along with trying to post, the platform is very archaic and cumbersome

QUOTE=edb;239150]Hi,
can understand your frustration BUT, could we all Please post on one thread as it cheeses people off trying to answer every where else on the BB.
Others often answer queries on another post, someone else spends time scanning pix and data that has already been posted elsewhere.
Regards,
Eddie B.[/QUOTE]