Gas on or gas off?

John *.?-!.* cub owner":1fghattj said:
....... it only takes one speck of rust or dirt in the float valve seat to end up with 7 gallons of gas on the floor/ground.
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The only way any of my Cubs or my H could leak 7 gallons on the ground is if somebody kicked over the five gallon can next to one of them and even then the odds are against you since the can is most likely empty. :D :lol:

In response to the original question, I always turn them off but never run them dry. Running them dry eliminates the chance of starting it without the gas on and unwittingly playing the "see how far you can get, on what's left in the carb, before the tractor dies" game. What fun would there be in not getting to frequently use a few Navy words when starting out with the Cub to do something?
 
Scrivet":2ctgbmfn said:
.... The only way any of my Cubs or my H could leak 7 gallons on the ground is if somebody kicked over the five gallon can next to one of them and even then the odds are against you since the can is most likely empty....
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A few years ago a friend asked me to help him start a cub he had not used in awhile. It had been setting under a large lean to shed for about 1 1/2 to 2 years. When I took the cap off to check the gas it was about 2/3 full, and below the fuel lever the tank was nice and clean. Above the fuel level the tank was almost solid rust. I had always kept mine close to full so they were ready to use, but that gave me another reason. As to why his cub would not start, he forgot to turn the gas on. :lol:
 
Gas off after parking.
Carb gets run dry if I'm froggin around after. Restarting due to forgetting to unload hydraulics is one way to run it dry....
Then turning the switch to higher charge rate to make up for having just pulled juice out of the battery and forgetting gas is off.
Like I said ,froggin.
If going to set more than a day the carb gets run dry. Usually , if remembered.
 
From the Farmall CUB Owner's Manual:

"It is advisable to close the gasoline shut-off
valve if the engine is to be stopped for any length of
time."

They must have known from the beginning that leaking was/could be a problem.
 
I shut gas off everytime and run it dry most of the time , just makes sense since the tank is higher than the carb would real be bad to have the tank drain out on the shop floor and burn up the shop with the cub :tractor:
 
Clownfish":3dz0cuvd said:
From the Farmall CUB Owner's Manual: "It is advisable to close the gasoline shut-off valve if the engine is to be stopped for any length of time."
They must have known from the beginning that leaking was/could be a problem.
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We sometimes forget that anything mechanical can fail. Murphy's Law would add "at the most unexpected time".
 
outdoors4evr":2elpivoq said:
I only shut the fuel off when I am parking it for the winter hibernation. On the numbered series, the valve is behind a panel so its a pain to access.
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Unless your tractor didn't come with said panels. I shut mine off every time on the 184 as it drips from the main jet adjustment if I don't.
 
I guess my perspective on this is totally different. I do completely the opposite of the general consensus on this thread.

I never turn off the fuel shut off, I never run my carburetor dry on any of my equipment--1948 Cub, mowers, leaf blower, weed eater, chain saw, standby generator, snow blower, etc. I have done this for 40 years and never had a problem ever starting any equipment due to a fuel problem. My idea is this--When the you run an engine until the fuel is gone, the carburetor is dry--if there is a little gas in the bottom of the bowl, it will get stale quickly. Also, I noticed on my gas can, where the gas evaporates on the side, there is a film that builds up, over time, due to the volatiles from the gas evaporating. My solution is to always keep fresh gas in the equipment. On any equipment, that I have not used, every two months (or at the most 3 months) I dump the gas (or siphon it out) and add fresh gas and fill the tank full. I then always start the engine to draw fresh gas into the carburetor. Keeping the carburetors full of fuel also keeps any gaskets/seals “wet” so they do not dry out and leak.

John M.

P.S. I understand if your carb on the Cub is dripping fuel, you need to shut of the fuel. I had that problem and fixed the float so I can always keep the shut off open.

P.P.S. I also filter all my gas with a funnel that has a fine mesh screen--so fine that water will not go through, but gas will.
 
As I stated above, I always shut off the fuel on anything with a shut off, but I NEVER run the carb. dry on anything. I do not like letting the gaskets or diaphragm depending on engine dry out.
 
I have two John Deers with auto shut off. On my Ford and Farmall I shut them off if they are going to sit for an extended time. They should not leak, but you are working against gravity. i will leave them on over night, but that is about the longest time.
 
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