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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

OC-3 fouling plugs

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Frank (N.Mi.)

11-06-2006 19:34:29




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I have an old cletrac crawler with the 14mm plugs in the adapters on the Hercules four cyl engine. It fouls plugs constantly. I had the plugs out last weekend and noticed that the plugs (the electrode where it sparks) were about an eighth inch or more recessed in the adapters when seated. It is using Champion rj8 plugs.(3/8" reach). I'm wondering if I could get better results if I increased the reach so that the spark is not so far up in the adapter? I realize that this may be "playing with fire" excuse the pun, but this fouling has gotta' come to an end. What about hotter plugs? On a side note--anybody ever put a 3.8 ford engine in one of these?

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jhill52

11-12-2006 03:46:00




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 Re: OC-3 fouling plugs in reply to Frank (N.Mi.), 11-06-2006 19:34:29  
Frank,
I know a guy in Wolverine who put a Pontiac "Iron Duke" engine in a Cletrac. Took alot of work .



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Hermit

11-07-2006 17:13:41




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 Re: OC-3 fouling plugs in reply to Frank (N.Mi.), 11-06-2006 19:34:29  
You can find spark plug diagnostic pictures on the internet to help you determine why the plugs are fouling - rich mixture, choke stuck, oil leakage, etc. Once you determine why the plugs (all of them?) keep fouling out, then the corrective action will be much closer. Good luck.



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noncompos

11-07-2006 12:39:28




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 Re: OC-3 fouling plugs in reply to Frank (N.Mi.), 11-06-2006 19:34:29  
If you do have an oil fouling problem hotter plugs don't fix, and you need to put off tearing into it, there were posts on one of these forums 2-3 months ago that jump-sparks (to make the spark hotter) were still available at parts stores (can't recall what they're called now). Good luck.



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RAB

11-08-2006 12:23:22




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 Re: OC-3 fouling plugs in reply to noncompos, 11-07-2006 12:39:28  
Naughty, doubling the spark gap on a mag system. Ok in those days, but can lead to an expensive mag rewind for these old tractors now.
Regards, RAB



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Thomas R. Spivak

11-07-2006 09:36:30




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 Re: OC-3 fouling plugs in reply to Frank (N.Mi.), 11-06-2006 19:34:29  
Use 20s if you can get them, they don't stick out further, just run hotter



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jdemaris

11-06-2006 20:09:21




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 Re: OC-3 fouling plugs in reply to Frank (N.Mi.), 11-06-2006 19:34:29  
I've seen OC3s and HGs with two-cylinder Wisconsin TFD engines, Chevette engines, Chevy truck 6 cyliner engines, Continental fours, etc. And I'm sure there are more out there. I think in some areas - the HGs and OC3s got parts swapped kind of like Ford Model Ts and As did at one time. In regard to oil-fouling - since there are no overhead valves to leak oil - it has to be ring/piston/bore problem. I don't believe anything short of addressing that is going to fix the problem. But - it cannot hurt to use a hotter plug and a two-stroke type electrode. Try Champion J12J.

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Frank (N.Mi.)

11-07-2006 17:46:11




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 Re: OC-3 fouling plugs in reply to jdemaris, 11-06-2006 20:09:21  
Ok, Thanks guys. Yes it is oil fouling it was my late Father -in-law's. I think he re-ringed it about a year before he died,some four years ago but it has smoked some ever since I can remember. Maybe the rings didn't seat....Anyway I only want to use about 10 to 20 hours a year but right now it is too painfull to keep running like this. Will try the hotter plugs and see what happens... Someday if I can ever stop working all the time I can think about a real fix...Thanks again---Frank

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