I just installed a brand new factory Motorcraft 2150 carburetor and the truck starts and runs fine until I start to drive. As soon as it gets up to 2000 RPM the truck bogs and and bucks when I get out of the truck I notice the smell of gas coming from the exhaust so I tried to lean out the mixture. To no avail. This makes me think that the float is out of adjustment as the truck was running and driving just fine with my old motorcraft carburetor. Any ideas and or the wet adjustment for the float for my carburetor. I haven't been able to find it anywhere online or in my shop manual.

 

Good 2150 stuff here. Motorcraft 2150 2V Carburetor

More X2 https://www.ford-trucks.com/forums/6...justments.html

http://www.carburetion.com/diags/2150diag.jpg

 

Make sure the fuel pump is supplying proper volume and pressure too. A lot of the new manufacture pumps are said to be way high on pressure. On the 2100 a lot of guys just use a quarter as a gauge, from the machined surface at the top of the bowl to surface of fuel. Close enough.

 

The first link didn't work for me for some reason. Thank you for the other two but they still don't have the wet float adjustment.

 

Let the truck idle for a few minutes on level ground. Shut the motor off. Pull the air horn and measure the fuel height from the machined surface at the top of the bowl to the fuel itself. Adjust the float height as required (down most likely) to achieve a fuel height in the bowl that is equal as measured with a US quarter. This is 29/32".

The specific fuel height varies by application slightly but this should work fine for now. I like to remove the float entirely when bending the tab. The idea there is to avoid excessive downward pressure against the viton tip of the needle and seat.

If you're really careful, and have a fire extinguisher nearby for safety, the engine can even be idled with 2100 series carburetor's air horn removed and watch the fuel height in operation. Don't do this in the garage. Don't rev the engine.

 

http://www.pirate4x4.com/forum/general-4x4-discussion/1697898-wheeling-carb.html

 

Fuel is concave in the bowl, any fuel measurement should be done 1/4 inch away from the sides/edges, it's higher on the edges..

I usually find that a 2150 float is correct if it sits level when the needle valve closes.

Yours looks a little low from my angle.

Pull the coil wire, dip an ounce of fuel out of the bowl, spin it over to refill the bowl.

Like Tester9 said, pull the float to adjust the tab. I think your tab needs to come up a hair to allow a higher fuel level in the bowl.

But, I don't think that is your problem. Also, that carburetor does not look "brand new".

 

That photo I believe is tedster's carb. I adjusted the float as per your instructions thank you! However problem was not solved so I ripped out the jets from the old and the new and compared. Swapped the jets after a significant difference was noticed. Now she's purring like a kitten!

 

oh yeah, that was his carb photo, oops... Glad you got her fixed....

 

Fuel for thought;

The Power/Enrichment valve adds additional fuel volume, when it is working properly. It is possible the valve is not opening up at higher RPM to add the additional volume of fuel.

Using larger Jets, as it sounds like you did, would compensate for a non working valve.

 

No, it's not my carb, the web link to where the picture is provided is in the same post.

Jets are only for steady cruise conditions over 35 or 40 mph, for the most part. They won't affect idle whatsoever. In fact you could even remove the jets entirely and drive around the block if ya keep the speed down.

Changing jet size IS a quick and dirty way workaround way to increase the fuel delivered under power/load but it's not the way to go about it. Check your plugs, it will run waaay rich and waste ga$ bigtime if the jets are oversized.