Reserve Fuel Access?

I understand that opening up the sediment bowl valve provides access to the reserve gas supply -- guess who just ran out.

But when I previously tried opening the valve it seemed like it unscrewed forever; so, fearing that it may not bottom out I stopped.

So the question is, does the valve eventually come to a stop when turning it counterclockwise and also, is completely counterclockwise necessary in order to access the reserve?

Thanks,
T

Run it of fuel using the two turns, remove fuel line and start opening the valve. Let us know what you find out. I always go all the way when I need it tho. It will stop turning.

Yes it does have a stop. As for how far you open it well again the more open it is the better the flow should be but that said. Many have not been used in so long they can be full of rust and dirt etc that they do not work

My valve stem spins open about 4-5 times before coming to a hard stop.
No way for it to come out unless the small mounting ferrule is loose. The one just behind the knob in the pict.

My reserve never worked even though i had about an inch of gas in the tank. Reason was the pin hole in the sediment bowl that allows for the reserve gas to flow was sealed shut by gas tank crud. I removed the bowl assy and disassembled it. Cleaned every thing out. I actually sealed the top of the filter screen with a brass plug. Seems like the filter screen only filters fuel that is 2 inches or lower in the tank. Any fuel that is higher than that just flows over the top of the screen. Lousy design in my opinion.

If it has an OEM fuel valve it will have the reserve
feature. If it is a newer replacement type it
probably does not have the reserve feature. Beware,
using the reserve gallon or so may cause debris to
get in the fuel line if the filter in the tank is
missing.

(quoted from post at 12:48:42 08/27/14) If it has an OEM fuel valve it will have the reserve
feature. If it is a newer replacement type it
probably does not have the reserve feature. Beware,
using the reserve gallon or so may cause debris to
get in the fuel line if the filter in the tank is
missing.

Click to expand...

Thanks everyone!

By the way, there was 3 1/4 " of gas when it seemed to be out of gas.

I did as suggested and closed the bowl valve, disconnected line at the carb and opened the valve. Flow was steady but a little frothy as opposed to a solid stream.

I have to confess there is a small in line filter just aft of the carb and I know the caution about filters with gravity feed.

Next I dropped the sediment bowl and like everything else I've dealt with, the screen was slightly askew. Anyway cleaned everything up including the cork gasket, sprayed it with light oil then blotted it dry and put it back together.

After finally getting it to stop dripping (I'm always worried about breaking the glass ) the flow test to the carb now yields a more solid and faster stream.

Worked the tractor for a bit and all seems well.
Held my breath and went down my new steep driveway (super sosft sand) with that crazy rake on the rear for an emergency brake.

Stupid as it may seem, I may have only had the valve opened one full turn. Could that have been the culprit?
And without the added fuel weight of a full tank bearing down on the outflow maybe only one turn would start starving the engine. (?)

Thanks again,
Terry

NAA right?
Mark a stick next time you run out.
You can run out with a lot of gas with a NAA, with the pickup on the side of the tank, and the shape of it.
And if you tilt too much.......

Put a draincock on the bottom of your carb bowl.
No doubt then if it quits.
(good for draining moisture/sediment out of the bowl too.)
I dump some gas in every time I use my NAA's after being bit many times.

(I never use reserve, don't know what's in the very bottom of the tank, don't want to know )

That is a poor design I sealed the top mine also now gas has to go through screen.

I have to confess there is a small in line filter just aft of the carb and I know the caution about filters with gravity feed.

Nutter myth that's preached till its believed...

(quoted from post at 22:52:51 08/28/14)
I have to confess there is a small in line filter just aft of the carb and I know the caution about filters with gravity feed.

Nutter myth that's preached till its believed...

Click to expand...

Lets hope you never need to become a believer!

If i really wanted to know I would install an inline filter and do a fuel flow test. I expect that any inline designed for gravity feed would do just fine. Probably most others also. If henry had them he would have used them.

NNP . . . picked up a drain cock today.

Hobo, Geiger and Greywolf
I expected to get flack about the in line filter. It was there when I got the tractor and seemed to be fine. I changed it yesterday and noticed that the 1/4" skinny end sides of the filter had been snipped off and thought it was a dopey thing to have done but now I see the reasoning behind it. I didn't snip the small stepped down ends off but just installed a new one as you see in the photo. But today after a short run it started to idle down to a stall so I shut it down and measured the gas and the new inline filter was empty. There was 3 1/4" of fuel in the tank.
I added more expecting to see the filter fill up but it didn't.
Drove it to my shop doors (BLED LINE AT CARB THINKING AIR LOCK) and let it idle thinking to run out the bowl but it just kept running forever. Shut it down and after a while the filter got mostly full again.

I'm going to install a new larger 5/16" see-thru tomorrow.

[b:cfa5a419cb]By the way, the screen is missing in the Marvel carb inlet.[/b:cfa5a419cb]

Does the tank outlet ever get plugged -- not the reserve but the main outflow? If so, I'm going to rig up a hose to the fuel line that can be held up higher than fuel level in tank and then after opening the valve, with cap off, blow compressed air into the tank. Think that is an OK idea??

Could be a sticky needle valve as well I suppose and I eventually will take the carb apart.

TOP PHOTO FULL,
BOTTOM EMPTY

(reply to post at 10:14:45 08/30/14)

Click to expand...

had the main fuel pick up pipe in the tank plug up. it would run, die and start up and run a bit and die. When i checked flow thru carb, it was lacking! I ended up replacing the sediment bowl assy.

You will not fill the filter unless fuel is flowing thru the line. With the float shutting off flow nothing will flow. Check it by removing the drain plug in the bottom of the carb. let it flow and see if it starts to dribble off or does it continues to run full stream?

I've disconnected the line at the carb inlet a few times and fuel has flowed freely, but I bought a shut off tap for the bowl bottom today.

That intermittent description seems to fit what's happening pretty much. I'll maybe try the compressed air idea.

Can the sediment bowl assembly be unscrewed without removing the sheet metal?

Thanks,
Terry

Be glad when this is resolved. If i don't wear a respirstor, my lungs ache for an hour afterwards. When I was a kid I was asthmatic.