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Discussion Starter · #1 ·
I'm gonna need an old hand with this one.
I put a new kit in the Pump (three bolt pump body) and as I cranked the engine over, with my finger on the Crankcase Tubing, the Push-Pull was less than 2-3 Lbs.
I think maybe my lower crank case pressure is too low.
Auto part Fuel line Vehicle Pipe
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Auto part Rust



It's hard to start, and when started runs smooth, but if I put a load on it, it just dies out.
The Electricity is good, as it will run fine with a little Carb Cleaner sprayed into the intake.

I was careful with the Kit. I knew it would be tough.

Any help from the old hands would sure be appreciated.:praying:
 

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Try turning the adjustment screw below the pump, out 1/2 turn.

The pump doesnt require alot of pressure or vacuum, just a constant pulse...

And make 100% sure the choke is closing tightly.
 

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Discussion Starter · #4 ·
Red that screw adjusted helped out a bit. It also led me to an intermittent spark plug.

I added a longer line to the Fuel pump source, and took it out for a drive.
It still runs out of gas and quits. But it'll start right up again if I use the Choke.
As soon as it starts it don't need the choke.

I took the top of the carb off. Cleaned out all the ports with Carb cleaner. Float is adjusted and has no holes in it. Needle valve is Rubber tipped but don't seem to stick.

I cleaned the carb bowl out. (Sure was dirty but no scraps n' Chunks) so I washed it out with Carb Cleaner too.

It's perplexing to me.
 

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Blow out your fuel line that leads back to the tank, see if you can see anything floating around in the tank, also try a new inline fuel filter.

If you hit the choke for just an instant before it dies, will it stay running?
 

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Discussion Starter · #6 ·
Yes, if I'm quick enough with the choke It'll stay running.

I did blow that line back to the tank but cant see anything down in that dark hole. I'll lighth a match.....:)

I think your idea is on the right track though. If the pump is working and it still runs out of fuel, there must be an intermittent blockage between the pickup in the tank and the Needle Valve in the Carb.
I can change the filter. I can also drain the tank and flush it or Vacuum out the bottom.
The Tank has a vented cap too. It has a fuel guage in the cap but the plastic cover is gone so it breathes easy.
 

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I had an MTD that had a similar issue, would run fine...cut for 10-15 minutes, then suddenly, sputter and die. Clutch in, choke, spin 4-5 times and crank right back up...run anywhere from a minute to 3-4 hours...and do it over and over.

Ended up having a leaf chilling out in the bottom of the tank..and it would get sucked up against the pickup...starve it...and as it slowed down..release and float away.

Also had a Craftsman with degraded fuel line, it looked great, but inside it was all swollen, and after running for a bit, would starve and die, but crank right back up.

Feel your fuel lines, all the way back, if at any point it feel soft and gel like, like a gel bike seat...replace the lines.
 
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