Garretson Valve--Propane--new Was running?

mightymac

OK, I put this [new] Garretson valve on my generator last summer adj. it and it ran good. Carb adapter also on.  Now in Oct. I tried to run it and nothing??  I hooked up to the house tank and it ran good last summer. I tried the primmer and can,t get anything to come out?? I put a hose in cup water see if it blow bubbles when press primmer nothing?? I loosen hose at valve and have plenty of propane from tank to valve??       I,m going nts with this???????????   Is there something I can adj. now to help this??

BB.

Garretson Valve (secondary, low pressure input propane regulator for genset):

https://www.propanecarbs.com/garretson/garretson_kn_demand_regulator.html

Sounds like the regulator has a gummed up valve assembly... Take apart and use some carburetor cleaner?

And you may want to order a spare regulator and or rebuild kit (just to have on hand)...

-Bill

mcgivor

Can't offer any direct help based on experience but the attached file may help

mightymac

BB. said:

Garretson Valve (secondary, low pressure input propane regulator for genset):

https://www.propanecarbs.com/garretson/garretson_kn_demand_regulator.html

Sounds like the regulator has a gummed up valve assembly... Take apart and use some carburetor cleaner?

And you may want to order a spare regulator and or rebuild kit (just to have on hand)...

-Bill

Well, Like I said it is a new valve, So I took it apart and honestly did find anything wrong? But put it back together and wa-la--It works? I push primer and can feel gas come out now. Only other thing is I had to adj the mixture again from last summer?? Seems to run fine don,t know what I did??   THANKS

jonr

If you are using a cylinder, you may have tripped the excess flow valve (has happened to me).  It does allow some flow, so it can fool you.

arby

As jonr said, I know that the 20 lb cylinders seem to need the valve turned on very slowly or almost nothing comes through. Some kind of new safety valve I guess.

BB.

I don't know if there are flow restrictors or not for propane tanks (if you have a broken line, the valve slams shut and blocks further fuel flow).

I have seen issues where connecting the regulator to the tank, that the probe does not fully/correctly enter the tank valve (there is a safety valve that will not open until it is pushed out of the way).

And there is a float valve that stops the tank from filling over ~80% of capacity (liquid level rises, closes float valve). I do not know if the foat valve will prevent fuel flow (tank overfilled, sitting on an angle, float valve is closed).

And the old question of liquid propane or gasous propane (anything over a small genset usually uses liquid propane and vaporizer on engine).

-Bill