nate81
Member
I had a 320 that was doing the same thing after it was hot it would start acting like it was running out of fuel. I found the the fuel pump was going bad. Mine had a mechanical fuel pump mounted by the carburetor. When it starts running bad remove the fuel line coming from the fuel pump going to the carburetor and put the hose in a clear container and crank the engine and observe the amount of fuel pumping out. It should squirt good solid amounts of fuel. If it just trickles out check to make sure you have a good fuel supply to the pump. It should run out of the supply hose at a good rate.
I think i found the fuel pump, i dont know why i assumed it was inside the gas tank like my car. But here is a picture http://i.imgur.com/0kQWUPW.jpg
The line i marked red is coming from the tank (passes through the inline filter) and goes into the unit with the goldish top half...then a smaller line comes from that one (marked blue)....i was going to unhook the blue line and turn the key to see if gas shot out but...the muffler was right there and very very hot...i was scared it was going to ignite the gas.
Would it run fine for 30 minutes or so and then cut off if the fuel pump was bad? Then after about 10 minutes of sitting, i'm able to crank it up and drive again.
Edit: I disconnected the line going from the pump to the carb and turned the key....it shot gas out pretty strong.
Edit2: I'd like to take the radiator off so i can see whats underneath.....i'm scared when i disconnect the two larger black hoses from it the coolant is gonna go flying everywhere.. does anyone know how to take this off?
Last edited: