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Allis B gas line
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john2189 View Drop Down
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Joined: 11 Sep 2009
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    Posted: 29 Jul 2026 at 10:39am
I want to replace the rubber gas hose with the 1/4” copper tubing. I have seen it run both in front of and behind the air filter. Which is the factory install?

'41 Allis B
'49 Farmall Cub
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DrAllis View Drop Down
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Points: 23484 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2026 at 11:25am
Behind and it makes things harder to work on I think. 
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PaulB View Drop Down
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Points: 5435 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2026 at 2:45pm
If you look at the pictures in operators manuals it will be behind the air filter. If you're not worried about it being as was done at the factory, why bother with hard line at all, just run a piece of hose wherever. 
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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john2189 View Drop Down
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Joined: 11 Sep 2009
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Points: 430 		Post Options Post Options   Thanks (0) Thanks(0)   Quote john2189 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2026 at 2:51pm
Originally posted by PaulB PaulB wrote:

If you look at the pictures in operators manuals it will be behind the air filter. If you're not worried about it being as was done at the factory, why bother with hard line at all, just run a piece of hose wherever. 


I don’t have a manual.
I have rubber hose now. So I guess it works.
'41 Allis B
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
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Points: 93064 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2026 at 3:00pm
use the rubber hose and put an inline filter.. for LONG TERM fix..
Like them all, but love the "B"s.
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john2189 View Drop Down
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Points: 430 		Post Options Post Options   Thanks (0) Thanks(0)   Quote john2189 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2026 at 4:44pm
Originally posted by steve(ill) steve(ill) wrote:

use the rubber hose and put an inline filter.. for LONG TERM fix..


There is no filter, just the screen in the sediment bowl.
'41 Allis B
'49 Farmall Cub
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steve(ill) View Drop Down
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Points: 93064 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2026 at 7:42pm
that is correct.... but when i buy a 75 year old tractor i put a small inline filter ( like off a lawn mower) to clean up any CRUD in the tank or anything that is added... that could PLUG a orifice in the carb... protect that carb... no rebuilds needed..
Like them all, but love the "B"s.
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john2189 View Drop Down
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Points: 430 		Post Options Post Options   Thanks (0) Thanks(0)   Quote john2189 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2026 at 8:16pm
Originally posted by steve(ill) steve(ill) wrote:

that is correct.... but when i buy a 75 year old tractor i put a small inline filter ( like off a lawn mower) to clean up any CRUD in the tank or anything that is added... that could PLUG a orifice in the carb... protect that carb... no rebuilds needed..


Thanks. The tank is very clean inside, but I did find a new piece of hose and a new fuel filter on my parts shelf.
Who knows how old the rubber hose that is on it now. It’s pretty stiff and hard.
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Gary Burnett View Drop Down
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Points: 3267 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary Burnett Quote  Post ReplyReply Direct Link To This Post Posted: 30 Jul 2026 at 6:26am
I like the lines on the outside of the air cleaner on those style tractors,especially with using ethanol tainted gas it'll keep the fuel cooler and also want an inline filter.Its surprising what shows up in those filters.
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Points: 224 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SilverShoes Quote  Post ReplyReply Direct Link To This Post Posted: 30 Jul 2026 at 7:14am
Funny, I use ethanol in my weed eater, chainsaw and lawnmower and have 0 issues with starting or operating. I haven’t ran them dry for winter for 2 years either. But I do try to keep them in a garage.
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Points: 56010 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 30 Jul 2026 at 3:29pm
Originally posted by SilverShoes SilverShoes wrote:

Funny, I use ethanol in my weed eater, chainsaw and lawnmower and have 0 issues with starting or operating. I haven’t ran them dry for winter for 2 years either. But I do try to keep them in a garage.

May be just luck, or Kansas doesn't get the same mix of fuel as say the northeast megalopolis.  All 2 stroke I use here is Coleman camping gas plus the 2 stroke mix.  If I did it your way here, I'd be spending on  twice on carbs versus the $15/gal that the CCG costs me...Wink
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Gary Burnett View Drop Down
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Points: 3267 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary Burnett Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jul 2026 at 6:22am
Originally posted by DiyDave DiyDave wrote:

Originally posted by SilverShoes SilverShoes wrote:

Funny, I use ethanol in my weed eater, chainsaw and lawnmower and have 0 issues with starting or operating. I haven’t ran them dry for winter for 2 years either. But I do try to keep them in a garage.

May be just luck, or Kansas doesn't get the same mix of fuel as say the northeast megalopolis.  All 2 stroke I use here is Coleman camping gas plus the 2 stroke mix.  If I did it your way here, I'd be spending on  twice on carbs versus the $15/gal that the CCG costs me...Wink
Ever notice its the folks from corn growing areas that claim not to have problems with ethanol? 
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steve(ill) View Drop Down
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Points: 93064 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jul 2026 at 10:09am
there must be variations across the country.. We live in Illinois and yes it is corn country... dont know how that effects it..  I bought a new F250 in 1989 and have used Ethanol in everything since then... mower, weed eater, chain saw, D17, Allis B, B&S mower, van, car, trucks.. everything for 35 years... That is 95% of what they sell in Illinois.. Yea, there are a few places you can buy "non ethanol" if you want to pay and extra $1. a gallon... but dont need that in Illinois... why, i dont know..??
Like them all, but love the "B"s.
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Ray54 View Drop Down
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Joined: 22 Nov 2009
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Points: 5009 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray54 Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jul 2026 at 10:46am
I used gas out of farm tank I filled trucks and tractors at the ranch until 15 years ago, or near about. Then started having trouble with all the 2 stroke engines. Been using the over price stuff since. Still having more issues than 30 and 40 years ago.

But all fuel is junk compared to years ago. Wink But we are saving the world, so be happy to anything other than muscle power.Angry If only the almighty that make the rules would sweat more and think less.
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DiyDave View Drop Down
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Points: 56010 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jul 2026 at 3:28pm
Truth is there are dozens of "boutique" fuel formulations around the country. So where you are, and what the state you reside in decides which formulation of gasoline you get.  Politics, in short...Wink
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john2189 View Drop Down
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Points: 430 		Post Options Post Options   Thanks (0) Thanks(0)   Quote john2189 Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jul 2026 at 8:21pm
I kept the rubber hose but I added a fuel filter.
'41 Allis B
'49 Farmall Cub
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