On Wed, 15 May 2013 19:04:41 +0000 (UTC), wrote:

Gunner Asch wrote:
snip
Nobody?

Doggonit I'm a "carburetor modifier" even and
I have no-idea what you're talkin' about, G. :/

Alvin in AZ

What...I didnt make it clear? My forklift has a carberator..and a
pressure regulator (normally called an evaporator). It has what is
called a "lockout" in it. This lockout keeps the evaporator from
giving any fuel to the carby..unless there is suction on a port on the
body of the evaporator. Just a few ounces of suction opens the
evaporator and allows it to supply fuel to the carb. The suction is
provided by a connection from the carby to the evaporator via a short
hose..so when you crank the engine..a little bit of the suction that
happens in the carb is also applied to the evaporator through that
hose..letting propane flow into the carb..and then starting the
engine.

What I have is no suction on the carborator port..and ..and..when I
apply suction to the evaporator..nothing flows. Only if I apply
PRESSURE to the evaporator does fuel flow. Blow into the suction
(vacuum) line..and it opens the valve and voila..fuel.

There is a button on the evaporator unit that is a "primer". When you
press it..it does something inside and it allows fuel to flow into the
carb without suction. So you dont have to crank it for 10-15 seconds
before the engine starts. Press the button..it pushed out propane
directly to the carborator. Kinda like a choke or gas shutoff
override (which it actually is)..it floods the carb with a big blast
of propane so it doesnt have to crank very hard before it starts.

So when I press the "primer" button..and hold it..the engine starts
right up, but the moment I let it go..the engine dies because the
evaporator stops allowing fuel to flow to the carb.

So I have something wierd with the evaporator/carby..two things...it
requires pressure to allow gas to flow out of the evaporator. when it
should be a vaccum......and the carby isnt supplying any vaccum..or
not enough.

Many of these engines dont have an evaporator with a "lockout"...that
vaccum line that allows propane to flow only if there is suction on
that port. They use a electrically operated valve. Turn on the
key..and it opens up the line from the propane tank to the
evaporator..which allows fuel to immediately flow through it.

The evaporator btw...does several things...it takes the 380 psi from
the propane supply tank..and regulates it down to about .5- 1.5 pound
pressure...and because there is a very cold liquid flowing through
it...has radiator coolant running through the back of it to keep it
warm and not freeze over. When the coolant gets hot..it heats up this
evaporator pretty good...and make the change from a liquid to a gas
even better.

Is that clear enough now?

Shrug...best I can tell you.

Gunner, on his way to LA
--
"You guess the truth hurts?

Really?

"Hurt" aint the word.

For Liberals, the truth is like salt to a slug.
Sunlight to a vampire.
Raid® to a cockroach.
Sheriff Brody to a shark
Bush to a Liberal

The truth doesn't just hurt. It's painful, like a red hot poker shoved
up their ass. Like sliding down a hundred foot razor blade using their
dick as a brake.

They HATE the truth."