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Briggs plastic gas tank question

#1

O

Ocean909

I just rescued a newer Briggs that was headed for scrap due to a carb issue. When I tipped the mower to change the oil, some gas escaped from the top of the tank where a little fitting?? has been snapped off. I've seen this type of tank before but never with the little fitting. It goes into the air cleaner housing.

I'm not crazy about spending $50 on a new tank for an unknown mower. So other options or advice would be appreciated.
Model is 103MO2 and I've attached a pic of the tank and circled the fitting

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#2

M

mechanic mark

Need model & serial #'s from mower as well as B&S model xxxxxx, type xxxx, trim xx, code xxxxxxxx from engine. Is mower a Murray, Sears Craftsman?


#3

O

Ocean909

Part number for the tank is 594112 superseded to 84004115
Mower is Husq 96145003500
Briggs engine 103M02-0070-F1

I'm wondering if this is a tank vent of some sort.


#4

R

Rivets

You are correct, it is a tank vent, which isn’t used on most engines.


#5

O

Ocean909

Rivets said:
You are correct, it is a tank vent, which isn’t used on most engines.
Click to expand...
Thanks for the reply. So I guess this takes the place of a cap vent for emissions? I'm no engineer but it seems really dumb to place a thin plastic tube into an area that is frequently messed with.

Would sealing this hole and using a vented cap be a solution? The used tanks on ebay are going for around $50 and I'd like to avoid it if possible.
Again thanks for the reply and any ideas. Its greatly appreciated.


#6

R

Rivets

To my knowledge, gas caps are not interchangeable. I wouldn’t seal it off, but would keep checking with your local repair shop to find a used tank. Should be plenty around very cheap.


#7

sgkent

sgkent

might be an emissions thing like on cars where the venting is burned. Also if the venting is filtered, it might keep dust out of the tank.


#8

sgkent

sgkent

after studying your photo, you might have two additional solutions. One is to use some kind of flexible hose such is as used on 2-cycle fuel tanks where the hose goes thru a small hole and seals itself. The other would be to epoxy in a small piece of brass tubing in that spot. You might even find a small inexpensive minature threaded barb that could be used such as https://www.mcmaster.com/products/miniature-pipe-fittings/


#9

O

Ocean909

Thanks for the replies and Ideas.

@Rivets I'll definitely give a shop a try, but they are getting harder to find. Had three close up in the last 5 years or so.

@sgkent that's a good idea. I have some black tygon line that may work. I just wonder if there's something in the end of that tip keeps the gas from pouring out freely when tipped up. Looks like this is may be a common problem as I've seen two for sale on ebay with broken breathers.

Again thanks!


#10

F

Forest#2

You can maybe rig a Homelite duckbill vent.
It's used in the fuel tank and fuel cap of chainsaws plus others.


#11

F

Freddie21

Plug it and drill a tiny hole in the gas cap if you don't want to spend the money on a vented cap.


#12

S

SamB

Is this the actual picture of your tank or a stock photo? I can't tell anything about the area. Depending whether the spout is on a curved area, I have had great results using a bulkhead fitting on one of my Snapper plastic tanks that had a similar looking gas line nipple broken off the bottom of the tank. I cut one of the barbs off one end as to not limit the amount of useable gas. But being higher in the tank wouldn't matter.



#13

G

Gord Baker

Ocean909 said:
I just rescued a newer Briggs that was headed for scrap due to a carb issue. When I tipped the mower to change the oil, some gas escaped from the top of the tank where a little fitting?? has been snapped off. I've seen this type of tank before but never with the little fitting. It goes into the air cleaner housing.

I'm not crazy about spending $50 on a new tank for an unknown mower. So other options or advice would be appreciated.
Model is 103MO2 and I've attached a pic of the tank and circled the fitting
Click to expand...
Possibly it is a tank vent or used to scour the VOS from the tank. Epoxy it


#14

L

lbrac

Forest#2 said:
You can maybe rig a Homelite duckbill vent.
It's used in the fuel tank and fuel cap of chainsaws plus others.
Click to expand...
Duckbill valves should vent in only one direction, if they seal well.


#15

O

Ocean909

Freddie21 said:
Plug it and drill a tiny hole in the gas cap if you don't want to spend the money on a vented cap.
Click to expand...
Sealing that hole and buying a vented cap would be ideal. My problem is finding a vented cap that fits this tank. I'd hate to buy a new cap only to find its sealed also. If anyone needs to know, the cap I have currently is 594061 which has been superseded to 84004416

Also Rivets is correct. This a definitely a vent. I covered the hole with tape and there was no gas flow. here is what the tank and vent look like in the parts manual.
Thanks again for all the replies. I have a few options thanks to you.
gas2.jpg


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