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DC Spark plugs

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Don R

07-23-2002 19:25:06




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Any opinions on what plugs should be run on a late model DC4 with the 5505 head that has been shaved somewhat. Also, my DC runs rough at low RPM, but smooths out at mid range and higher- any ideas? It has good power across all RPM ranges. Thanks for your help.




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joecool

07-28-2002 06:52:24




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 Re: DC Spark plugs in reply to Don R, 07-23-2002 19:25:06  
Don, I double checke my plugs. I was wrong the number that I gave you is for our cc. The number you want is autolite 3116. I have used 1 set for a year, decided to change them the other day, It was a waste of time, i installed the new but kept the old ones for spares. We have a Allis Chalmers with bad rings and since changing to autolites we havent' had any plug problems.



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joecool

07-25-2002 16:03:54




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 Re: DC Spark plugs in reply to Don R, 07-23-2002 19:25:06  
I use autolite, I think the number is 1076. I will have to recheck to be sure. I wouldn't put champions in anything, they can't hold up. The ruff idle sound like carb. how much is head shaved, do you have 4 inch pistons or what. What does it dyno at? I pull a 51, dc3, don't know what pistons are in it, it will pull in 5500 and 6500 class easy, spins out, doesn't run out of power, dynoed at 50 hp at 1200 rpm.PTO.

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Don R

07-25-2002 17:38:56




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 Re: Re: DC Spark plugs in reply to joecool, 07-25-2002 16:03:54  
Thanks for the info. Can you check those numbers for me? A lot of people say don't use Champion as they foul easily and permanently. I have a Late model DC4 with 4 inch pistons and the head shaved .030



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Baggsy-Wy

07-24-2002 07:28:48




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 Re: DC Spark plugs in reply to Don R, 07-23-2002 19:25:06  
The books shows Champion 15A or AC-85S's. The archives shows Champions D15Y's or AC C88's being a notch hotter and buring better when not pulled hard. The rough running could be your plugs or the idle adjust jet on your carb. I'd replace the plugs first and go from there...



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