Holley instructions contradicting on fuel bowl level ??

pishta said

Why do you do that? Just wondering as I thought a nice perc of an electric pump was the ability to set floats on a still motor..? Its a messy job when its idling if your new to it (like me) fuel squirting everywhere! Always seemed to have Carters or 'brocks where you could set the float level properly when its apart.

Click to expand...

Rusty gave the short answer and it’s correct.

The carb behaves differently when there is fuel moving through it at idle, compared to when there is no fuel moving through it.


You have to remember that there are air bleeds involved and at least one emulsion hole above the fuel level that can change the fuel level from the engine not running and running.

Sometimes it doesn’t make a difference and sometimes it does. That’s why I just always set the final fuel pressure when the engine is running.

BTW, I have been using some washer/seals from BLP under the adjusting nut and under the lock screw. They are white and I think they said they are Teflon, or maybe they said they weren’t.

At any rate, for whatever reason, those things let almost zero fuel past them when setting the float level. They are much nicer than the paper junk that comes in most kits.