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08-11-2012, 10:29 PM
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Join Date: Oct 2009
Location: Pomona, ks
Posts: 77
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Champion spark plug resistor
Champion REM38E
Is there a source for the internal resistor? Or are my plugs really ready for the trash?
Having sporadic hard starting. I have one electronic ign and one slick mag. Engine starts on mag only. Pulled plugs. Checked mag timing, spark etc.. Decided to measure plug resistance based on some other posts. Of the four plugs I got one to read at 60k and couldnt even get a reading on the other three!
Pulled the resistor out, nothing to see, similar measurements. Hate to throw a hundred dollars worth of good looking plugs away because a resistor the size of a tic tac has failed!
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08-12-2012, 04:15 AM
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Join Date: May 2008
Location: Brisbane Qld. Aust.
Posts: 2,271
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Champion will service the plugs if they are worthy of it, and they charge only a few bucks to do it, but they will not send you parts. I don't blame them either.
What is the electrode condition like?
Are the gaps accurate at 0.016 - 0.018" as this really matters when cold starting and when running LOP.
The other option is Tempest.
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David Brown
DYNON Authorised Dealer and Installer
The two best investments you can make, by any financial test, an EMS and APS!
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08-12-2012, 08:10 AM
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Join Date: Jan 2005
Location: Mtns of N.E. Georgia
Posts: 1,322
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Plugs
Plugs should read less than 2K ohms. If they read over 5K ohms, replace. Champion is not living up to it's reputation lately. Check for cracked or broken porcelain at the tips.
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Mannan J.Thomason, MSGT. USAF (RET)
VAF788
"Bucket List" checkoff in progress!
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08-12-2012, 11:06 AM
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Join Date: Feb 2005
Posts: 1,082
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After spending some time to learn about the Tempest plugs I will be a convert as my plugs need replacing. Here is one of their videos showing how their plugs are manufactured. http://www.youtube.com/watch?v=sxeG8...e5AUAAAAAAAAAA
Just completed my condition inspection and found one of my Champions over 5K ohms so trashed it.
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Mike
JAMES AIRCRAFT.com
Flying - RV8 Hot Rod "Drone Killer"
Flying - RV8 "Look'n Good"
RV4 - FAST & FUN! Rebuilt, Flown, Sold
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08-12-2012, 11:20 AM
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Join Date: Mar 2005
Location: DVT Phoenix
Posts: 1,187
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I'm reaching here but before you blame the plugs, check to see if the impulse is working by pulling the prop through and listening for a loud snap or click as you go past top dead center on all 4 cylinders? Larry
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08-12-2012, 12:37 PM
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Join Date: Oct 2009
Location: Pomona, ks
Posts: 77
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Mag clicks. Set plugs on top of engine and get a visible spark. Timing right. Mag check is fine. Runs fine. Sporadic hard starting is only complaint.
My cheep meter thats in my airport tool box gives me 60kohms on one plug and wont even read on the other three on the max setting of 2000kohms.
Engine not missing, no visible cracks. With resistor out center electrode reads almost 0 ohms. The silicone carbide resistors have just failed.
Unless a source exists for the little tic-tac sized resistor im probably gonna order tempest replacements first of next week.
Just seems silly to throw perfectly good plugs away. Why even make the resistor removable/replaceable if not able to service it?
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08-12-2012, 01:47 PM
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Join Date: Jan 2005
Location: Charlotte, NC
Posts: 1,523
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They're not perfectly good any more  You're not the only one having this issue with Champion plugs..
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Radomir
RV-7A sold
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08-12-2012, 06:00 PM
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Join Date: May 2008
Location: Brisbane Qld. Aust.
Posts: 2,271
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Quote:
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Why even make the resistor removable/replaceable if not able to service it?
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Champion will, send them in.
Or buy new.
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David Brown
DYNON Authorised Dealer and Installer
The two best investments you can make, by any financial test, an EMS and APS!
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08-12-2012, 07:04 PM
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Join Date: Jun 2006
Location: 8I3
Posts: 3,562
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There's a place in Van Nuys CA that reconditions plugs. I've heard good things about them thru friends. Might want to give them a try.
http://www.trade-a-plane.com/company-search?id=53148
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Not a thing I own is stock.
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08-12-2012, 08:21 PM
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Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
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Direct
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Reiley
Retired N622DR - Serial #V7A1467
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