Fuel pump install - silly, silly question

[SLOdatsun]

I have a new pump and I bolted it in, but nothing happened. I'm going to assume that the "arm" which enters the motor was just stuck inside there all willy-nilly.

• Where does it go?

• Is it possible that the "arm" did not fit into a slot?

I genuinely have no idea what happens inside the motor pass the exterior point of install so, as always, any insight is helpful. Thanks in advance!

[tjp]

Did you use the spacer between the block and the pump?

With the pump on your hand you should be able to move the arm up and down and hear the air moving in and out. If this doesn't work then your pump has issues.

[SLOroadster]

The cam has a lobe on it that actuates the arm of the fuel pump. The arm simply rests against the lobe. As the cam rotates, the lobe pushes the lever and pumps the fuel. There is no slot, it just sits there. My guess is that either the pump is bad (unlikely) or you have your line from the fuel filter run to the wrong barb on the pump. (So its pushing air from the empty float bowls through the fuel filter and into the tank.)

Will

[jhayden]

Not "silly" at all. You're not the first to have experienced the problem:

viewtopic.php?t=25969

Jon

[tjp]

There is no slot...

IF, big IF, there is a slot on the fuel pump lobe, then you might need to replace your camshaft or switch to an electric pump.

But, as previously mentioned, make sure you have the in and out plumbed correctly.