Setting the Float Level on a Holley Carburetor

Here is how to set the float level on a double pumper Holley 750CFM. You only need two tools, a screwdriver and a 5/8 open end wrench. It is simple to do, but make sure you watch for any gas spillage from the fuel system. You can do it with the car running or not running, but I prefer to do it when it is running and on a level driveway. Make sure you check your carburetor manual to know if the float level should be at the bottom or middle of the window.

#diy
#holley
#carburetor

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All videos are for entertainment purposes only. Attempt these projects at your own risk! If you do, make sure you follow all manufacturers instructions!

[marcuskay]

All the Brawler instructions I have seen ask for the fuel level to be midway on the site glass.

[timwindsor]

Very informative video brother. Thanks for sharing. Keep the content coming. Hope you have an incredible weekend. Much love and RESPECT

[BPattB]

I like how when I search stuff about my new carb Andy and your videos always 1 and 2 lol. Anyway my fuel level is at the top of the window on both sides. My fast idle is at 1700 rpm. So one thing at a time. Fuel blow level first then fast idle speed. Good times lol

[stevenbruce]

Ahhh, I’ve adjusted my Holley street avenger so I see fuel below half the site glass. No wonder I fouled the plugs.
Thank you!

[willtheone]

Hiya, rebuilding my first carb, and this was a helpful first stopping place for putting everything back together. Out of curiosity, are the fuel lines you have there a custom job or a kit? My street avenger just came with nipples and rubber lines, but I’d love the braided lines with the gauge. Thanks for the video!

[davidswift]

I had to do this to a brand new out of the box 4160 carb. Couldn't get any fuel in the bowels. Doesn't sound flow tested to me Holley, but I am a noob so... Good video. thanks.

[kimmorrison]

In my case, I have an older 4150 850 cfm double pumper WITHOUT sight bowls. I assume you then need to remove the FB end the do it while its off the carb?

[stevenbruce]

Is it the same procedure and level for the rear?

[staffordsanpei]

I have a Holley #4160. The other day, driving down the hwy. about 1800 rpm. for about 10 minutes. When I came to a stop, the engine stalled. When I tried starting it. It seemed like it was flooded. Could this be a float adjustment? I also have been having problems wit dieseling.I have been messing around with the float adjustment. Great video. Thank you

[KB]

I have a gremlin with a 383 stroker. It starts runs then dies going down the road. Have to let it sit a couple mins and it starts runs then dies again. Could it be a float problem?

[tjrene]

The rear float, I’ve adjusted the same way as the front but it seems to have raised the level???

[tristenfletcher]

I have an holley on my boat would you set the float level as the car

[tjrene]

I’ve heard of floats sticking, could that have occurred?

[lilebkillinit]

Think about the amount of trial and error for the person who invented the carburetor 😢😂

[big]

You described turning the locking nut clockwise or counter clockwise to adjust the float level. I'm brand new to this but that makes no sense at all. I would expect to turn the screw clockwise to adjust the float down and vise versa. Why would you say to turn the wrench to adjust the float level?