Holger

Allison possible sources of info.

Where did you get engine? Did prior owner run? Possible source of info
for trouble shooting.

A shot in the dark. Aircraft carbs have a mixture control that you use
to shut engine down when stopping. Is Mixture Control in idle cut off?
If so put full rich and see if engine starts and runs.

Check:

Unlimited speed boat racers. Some used Allisons prior to going to
jets. Some may still do?
Air Force Museum at Wright Pat in Ohio.
Any P-39 sites. It used the Allison.
Any P-40 sites, It used the Allison.
Any PT boat sites and organizations.
Any other tractor dragsters using Allisons.
Confederate Air Force (They have a new name now to stay PC)
Look for another carb (in 'junk' yard) and sub for the one you have).
Look on web for carb rebuild places. Also ask any rebuilders in
your neighborhood who rebuilds that carb. If they don't they may
know where to go.
Can you find/buy a rebuild kit for the carb (with instructions)?
I may be wrong but believe the carb was a float type. If so, then
float or float valve might be stuck.

Saw a P-63 getting a 100 hour a few years ago and in talking to mech
he said that there were a number of places that rebuild Allisons.
Might inquire around and see if you can find and get any info on Carb?

Let us know how you make out with the 'old' Allison. Flew it in P-40's
years ago. Sounded like a box of bolts in a tin can vs the Merlin.


Big John


On 18 Aug 2003 01:41:56 -0700, (Holger Stephan)
wrote:

I was contacted with a question about this engine and since I know zip
about it I'd like to relay this to the group.

"My husband pulls modified tractors and has just switched over to his
first allison engine. He is having problems with his CG aircraft
carburetor , the engine starts on the priming fuel but won't continue
running. There is fuel pressure - but there seems to be a spot where
the fuel stops flowing.... (ignore the wifely tries at explaining this
please!) OK so what I'm looking for is a manual or a website that may
have some answers - do you have any ideas that can help?"

After receiving this question I asked for more detailed information
and received this:

"The engine is not a turbine and is not hooked to an aircraft. It is
sitting in a tractor frame for pulling (you know, they show it once
and a while on TV...) He pulls locally (a weighted sled to see how far
down the track he can get.)
OK other questions: It is a 1710 allison v-12 engine WWII p 38 engine.
The carburetor is a CG Aircraft Carburetor Model 1 685 F and we know
very little about it and we have even checked with Holley but they
said they don't keep manuals dating that far back. Someone should?
Wouldn't you think so?
My husband keeps telling me to type that the carburetor was used on
v-12 PT boats."

Can you guys help her? Contact me for a direct contact. I don't want
to blast it out without her permission.

Thanks!

Holger