Pony Motor Trouble....

You may need the technical information that mag, I assume this to be the older style 2 cyl. vertical orientated starting engine, common to the D7's prior to 17A series and several other tractors going back in model years.

If you can "wring out" that mag, and know it's timed internally, but I think just the fact that she is running, it could be correctly timed, as I don't think it would run at all if not. You could check the spark, nice healthy blue spark at each plug. You should check the fuel tank, they get rusted up and will have coffee grind like particles that quickly clog up the sediment bowl screen, and restrict fuel, causing what you describe., have experienced that, makes em sluggish and or quit. Remove the tank, put clean crushed stone in, get it sloshing around, say like strapped to tractor wheel or something rotating safely, or do by hand, remove rocks, flush and it will be clean from abrasion, though it could be coated or treated to prevent rusting, keep the tank full, might help. You can put a high rise screen on the sediment bowl assembly too, and check the screen at the end of the fuel line where it attaches to the carb, this too can be clogged. Use solid conductor plug wires, copper etc,. and Autolite or NGK plugs, Champions seem to be problematic, though I have no facts on that.


You might find some old books for Prestolite magnetos on e-bay, have seen some for Eisemann there, also seems to be several folks in the old tractor arena that work on or repair these mags, someone here advertises rebuilt mags in the for sale section, R. Fuller.

There is a cross reference chart, seems Prestolite owned Wico at one point, so maybe it's just a Wico, with a different name on it.

http://www.smokstak.com/forum/showthread.php?t=29541

Billy the 14A D8 is the same starting engine as the D7 17A and the 15A D8 torque convertor tractor and also the 18A oil clutch and the 19A D9 torque convertor tractors.They all have the mag. positioned on the top of the front cover with the mag spark plug holes staight up in the air.That drive in the top of the front cover has a couple notches and they have to line up with engine on the TDC firing stroke on front cylinder.

SJ, you would know this one, having been there when these were new, but wasn't there a transition from the old type to the new type like the 17A's starting engine, within those 13A, 14A, and 15A series ?. I thought,(and maybe I'm just flat out wrong or I've just confused some of these together) that I have seen some of those right before the H series with the older style starting engine. I realize the D13000 was obsolete when the 2U's production ended, and now thinking about it, (and I forget the next model engine replacing the 13000) the new series motor probably is not compatible with the older style starting engine.

Someone here or elsewhere had or was looking at a 15A, was in the Bronx, I have 2 photos of it and it's missing the starting engine, but looks like it was fitted with an older type, and maybe a 13000 engine. I realize the 14A was direct drive/oil clutch, 15A was a torque converter, 13A - early powershift ? Somehow I still think I saw one of these series with the older style starting engine, I'm sure this has been discussed previously, but now I'm curios about it, you would definitely know.

No, the 13A still used the D13000 engine and was just an oil clutch or dry can,t just remember and then starting with the 14A and 15A they were the new D342 engine and the D9 had the D353 engine in them but they all used the same starting engine along with the D7 17A with the D339 engine.The early D7s like the 3T used the D8800 diesel engine in them and they had the same starting engine as the D13000s used in the D8 2Us and 13A.

The 14-15-17- 18-19 can use a vertical magneto counter clock wise WICO
and AMERICAN BOSCH and these dozer can use too a poney motor 9h6197
with horizontal magneto clock wise.

Well the carb rebuild seemed to help alot!!! Last night was the first time we started it that it didn't require any fire-in-a-can to help assist!!! I'm thinking so of the GOOD GAS i run in my old 2 cylinder pulling tractor might help out a little too 😄 Tried getting some NGK or Autolite plugs, but NAPA wasn't able to cross them so i ended up with Champion, anyone know the what the NGK or Autolite numbers would be??

Someone here should have the plug cross reference, I think I have it on an old hard drive in one of my files, I'd have to look and see if I have it on this one, I've got an old PC with some info on it I need to transfer out etc.



SJ, so in the transition to/with the 13, 14, & 15A's the 13A was the one that had the older style D13000 and starting engine common to several other tractors. I would have to post that photo of that 15A someone sent to me awhile back, I could not tell what motor was in it, was also kind of odd for a tractor like that to be in the Bronx, looked like it was in the backyard of some old brownstones. Those 3 models must have been a collaborative effort to refine the D8 to where the H' series started, 14A sounds like it was a well built one.

NGK A6 or Autolite 386 for replacement plugs (18mm)

The easy way to tell the 14A and the others is the magneto is on the front cover of the starting engine and is on top of it with the wire holes sticking straight up in the air.The 13A has the mag. down front facing the radiator.