[trevarthan]

Originally Posted by Sparky dave

Are you back on the road yet?

Unfortunately, no.

To recap:

After we changed the fuel pump the engine immediately went from running for minutes to not running for more than a handful of seconds.

We removed the carb.

This was the carb immediately after removing from the vehicle: https://youtu.be/n1xsBgTyjTo

We disassembled the carb. https://imgur.com/gallery/cmJFOoL

Ok, and here's what's happened since the last post:

Immediately upon disassembly we noticed the float sticking. I wish I had filmed that, but you'll have to take my word on it.

I cleaned the parts using a combination of a carb cleaning chemical bucket kit from autozone and an ultrasonic cleaner from harbor freight: https://imgur.com/gallery/r3XIL8I

My son rebuilt the carb (I gave him this truck and he's been driving it for 6 months, so he's the other person when I say "we"). This is what it looked like after I got it back from him: https://imgur.com/gallery/JDuFs9x

Here's a quick video of the new float moving without restriction: https://youtu.be/z3OAUSM7gwg

A few of the bolts on the top part of the carb (the long bolts) were stripped in the bore:




So I replaced those bolts with longer bolts where the bore had some extra room. I actually got creative here and bought longer bolts from ace hardware then cut them slightly shorter with a hacksaw so they would seat properly.

We tapped the air cleaner bracket bolts to a larger size because they were stripped as well:



I didn't get to bench test the carb as much as I should have. I may take it off and do a fuel pressure test soon. I bought a positive and negative vacuum hand pump for this purpose. It'll arrive in a few days. Also, I was watching a motorcycle carb rebuild video today and learned I can do something similar using a gravity fed bottle of gas. I may try both.

I installed the rebuilt carb today: https://imgur.com/gallery/A527iUr

I noticed the gaskets became wet with fuel pretty much immediately:





I've got the screws as tight as I can get them. I'm using a GP Sorensen gasket kit from autozone. Not sure if these are just cheap gaskets or if there is some other problem.

The engine still does the same thing. It runs for a handful of seconds and then dies. I can't even keep it running long enough to set the mixture screw properly.

I think tomorrow I'm going to try to figure out how to temporarily replace the steel fuel line between the carb and the pump with a soft line with an inline pressure gauge. I need to know if the pump is making too much pressure or if we just screwed up the rebuild. It seems like it's flooding to me.