From: Robert Barber (rbarber41@hotmail.com)
Date: Mon May 20 2002 - 09:00:00 PDT
Be careful of numbers marked on jets. On GM Q-jets the
number was supostly the opening dia in inches, but all
carbs installed on the same type car (IE Chevy Chevelle
350) had the same jets installed. BUT when the carb was
flowed at the factory if it didn't flow right the jet
was drilled to a larger size. This is known to be a
standard process for carb Manufactures.
I would inspect the jet very closely to see if its a straight
thru design or has a taper on either the top or bottom.
I would then very carefully check the opening dia with drill
blanks to verify what size it actually is. That way you
can get an accurate sizing of the diameter vs playing
the stamped numbers game.. This way you know where your at
and where your going.
Bob B
>From: "Winget, William A CONT JTFCS5G" <winget@jfcom.mil>
>To: <mil-veh@mil-veh.org> (Military Vehicles Mailing List)
>Subject: [MV] M151 Carb Follow-up (Also seeking some '42 Autocar parts)
>Date: Wed, 15 May 2002 08:58:32 -0400
>
>Interestingly, they DO have various Main jets, as last night I took apart
>two others to find the best parts for the first one, and the Jets were
>numbered differently.
>
>Seems there was a jet # 28 in the first one, and two with # 30 jets in
>them.
>The Rebuild kit (complete version) has a # 30 in it as well, so maybe this
>is a MOD the Army did? Rejetting to a larger jet??
>
>So, still seeking an answer by someone that has rejetted one with good
>results.
>
>By the way, as the idle screw is tapered, I don't really want to drill it's
>hole out, as I think there may be a taper in the seat as well. Rebuild kit
>DOES have a new idle screw in it.
>
>Hoping that the primary problem on these is air leakage around the throttle
>shafts, and the seals provided in the kit will cure it.
>
>Suggestions accepted. Thanks
>
>A. Winget Virginia
>TOW MUTT among MANY others.
>
>PS: Need '42 Autocar Semi Tractor, Open cab Doors (both needed in any
>condition), Inner open cab Windshield assembly, Maybe a Carb, as it was
>converted to propane, and two headlight buckets. Have an old 4x4 tractor
>on
>the way from Kansas to haul our junk to the shows in "Period" style.
>Regards WAW
>
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