The Stovebolt Site Forums The Shop Area Engine Shop Gas filter issues

After a recent trip up a long steep climb I found my 261 cutting out and assumed it was due to the gas boiling as my engine was at around the 210 degree point and was seeing bubbles in both my mechanical gas pump with a glass covered strainer and an after market glass bowled gas filter with a paper element fastened to the Carb.
After more issues later on I removed both the screen on the pump and the paper filter even though they both looked clean as did the bowls.
I blew out the screen and replaced the element the went on my way without issue.
This morning I checked the the element which looked clean to my eye but when cut open the folds were packed with black sediment which I assume is the inside of my 4 ft. Section of rubber gas line possibly due to methanol in the gas.
I wish I would have clued into this while still on the hill as I carry spare elements with me.
Next time maybe!

John

I avoid putting any rubber on fuel lines if I possibly can. Currently I have a steel line from tank to pump to carb. Tank, lines and pump are new.

What do you do to handle engine vibration/movement?

When I installed the new line, I was unaware that there was supposed to be a rubber line between the petcock and the steel line. I just hooked up the new line the way the old one was. I haven't done anything to change it.

I'll be correcting this over the winter, mind you it's been that way for 30,000 plus miles but when I needed Max flow it wasn't there.

John

Interesting. Usually there is a short rubber section between the frame-mounted hardline and the petcock for cab movement, then another between the frame-mounted hardline and the fuel pump for engine movement.

I am kind of surprised you have not had fatigue issues with those both solid.

I ordered a new hard line and petcock . Neither end had bulges for hoses but rather flared ends and male threaded fittings. Each end threaded directly into the fuel pump and petcock without any fitment issues.

The bends appear to be in the right places, etc.


How would the hose attach to the pump and petcock? Are you supposed to cut the line and just clamp a hose on it??

John,
Where is the tank mounted on your beast? There is a lot of banter about sections of rubber hoses in this thread which I do not believe relate to your panel truck. Those posters are likely referring to AD pickup trucks with tanks in the cab. Those do require a short section of rubber hose because the cab moves independently from the frame. You don't have that issue with your panel truck. Do you know if panels had any rubber fuel lines at all originally?

52 Carl, tank is attached to the frame with conventional brackets.
Rubber lines run from the top of the tank for about maybe 5 ft then hooks up to what I believe is the original steel line to the fuel pump.
I bought the truck in 2016 and was this way since I bought it and never thought twice about it until this happened.
Again I'm guessing the substance I found in the filters was ex gas line due to ethanol.
It seems I'll have to drop the tank to correct this, I'll know more when I get it into the garage.

John