Another day another problem

[Ifixoldjunk 778]

I ended up being given some free wood. Both new saws are dull so I grabbed the trusty homelite xl-12.

I ran out of gas after the first tree was cut apart. Upon cracking the gas cap it started spraying gas everywhere. Didn’t think too much of it and fueled it up for the next go around.

After I got all my sawing done I set the saw down to have some lunch. When I returned the carburetor was sitting in a pool of gas and the gas tank was still hissing.

 

im guessing it’s a clogged vent, but would anyone know where to look on a xl12? Little bit of a different beast than today’s saws

 

[lynnmor 7,305]

If you have a sintered bronze vent in the side of the gas cap, carefully tap it out by using a tiny punch or pick.  Behind it you will find a black blob that once was a duckbill valve.  Clean and replace the duckbill and bronze insert.  This may not prevent pressure buildup, but it is a good place to start.

 

Edited April 2, 2022 by lynnmor

[Ifixoldjunk 778]

@lynnmor

Ill try that. It’s a brand new gas cap. Could have manufacturing crud in it

[wallfish 16,994]

Weird, those tanks shouldn't pressurize. Definitely clogged vent in the cap

[953 nut 55,198]

      I don't know a thing about chainsaw fuel systems but if it has a vacuum fuel pump one of the check valves could be bad resulting in the fuel tank being pressurized.

[Ifixoldjunk 778]

Well, checked out the gas cap. The brand new cap was sold with a defective duckbill valve. It didn’t have a hole in it! Poked a hole in it with a paper clip and it’s seemed to resolve my issue

[lynnmor 7,305]

The duckbills are available on eBay.  If you have a defective one, expect some gas leakage in some positions.