From: quiggy (quigstro@netcarrier.com)
Date: Tue Feb 04 2003 - 14:46:19 PST
R43 is a slightly cooler plug than the 44, so it will be a little richer.
Try gapping them at .030 to .032, as the extra gap will effectively lean the
mixture out. If it runs okay and doesn't misfire, pull a plug and check its
color. If its black, its too rich. If it's white, it's too lean. Brian
Quinby M211, WC12s, WC21 GMcertified Tech, ASE cert Master Tech and a whole
lotta other B.S. certs that don't pay poop
----- Original Message -----
From: <RKiser8375@aol.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Tuesday, February 04, 2003 3:47 PM
Subject: [MV] Correct Spark PLugs for DUKW/CCKW
> According to TM 9-802, the technical manual for the DUKW-353, the DUKW
should use an AC type "44 or 44 Com." with the gap set at .025" or .030"
respectively. I went to a local auto parts store and they looked it up in
the AC/Delco manual and said the GMC 1941-1945 trucks should use a R43 spark
plug, so I bought six of them. Now, I'm wondering, what gap to use. Also,
I'm not sure if it matters or not, but the DUKW normally operates at about
8,000 feet, and tends to run rich. I intend to advance the timing some, but
I'm not sure if I should adjust the gap for this or not. Any help is
greatly appreciated.
>
> Rob Kiser
> 1945 DUKW-353
> rkiser8375@aol.com
>
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