Military-Vehicles: Re: [MV] M38 loses power, stalls

Re: [MV] M38 loses power, stalls

SBJohnston@aol.com
Fri, 1 Aug 1997 13:43:01 -0400 (EDT)

Alan wrote:

>look down into the carburetor. Crank the butterfly valve

I see -- a way to tell if an empty bowl causes the stall. Definitely a
great idea, but I'm not sure I can get a view down into this carb. It has a
built-in right-angle throat. Maybe I can do it with an inspection mirror and
flashlight. And would the accellerator pump work on this carb if the engine
is shut down -- someone pointed out that engine vacuum actuates the
accellerator pump on this carb. Hmmmm....

>here is a DANGEROUS, non-recommended procedure

I like it already! Let's do it. Where's my liquid O2?

>disconnect the fuel line from the carburetor, aim it into a
>milk carton, and crank over the engine. If a good firm
>stream of fuel pulses out of the fuel line, it bodes pretty well

I cranked the engine with the fuel pump output connected into a pressure gage
and got the 3 psi figure, but now that you mention it, it would indeed be
useful to see the relative strength of the stream. I remember how my old '65
Ford Falcon's fuel pump could squirt, so I have some standard of comparison.

Thanks Alan! More trobleshooting tips = a more productive weekend for me and
the M38.

Steve Johnston

sbjohnston@aol.com

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