Fulcrum2111

Hello I want a replacement carburetor fro a airplane zenoah g26EI. I can´t find the wt-645 but I can get a WT-834-1 or a WT-929 carburetors. Will any of them work with this engine?
Thank you

w8ye

My Feedback: (16)

The WT-834 is too big

The WT-929 is the same size as the WT-645 but is not very sophisticated compared with the original carb

Fulcrum2111

What replacement walbro carbs would be similar?

w8ye

My Feedback: (16)

The definitive replacement carb is the WT-813 as it has a accelerator pump. It is the same size as the original. This carb does not have a choke.

WT 677

WT-643

WT-644

WT-645

WT-257

These are a size smaller and were on the G-23 but you will like them

WA-167

WT-499

WT-197

WT-647

Fulcrum2111

Ok I am looking to the 813, but I have three questions:

-Can I take the primer bulb and swap it with the plate of the 645?
-If not, Can I run the engine with the bulb in a cowled (with no access to the carb) airplane? (BTW what is the bulb for?)
-How can I choke the engine if it has no choke? Can it be done closing the throttle butterfly?

Thank you

Antique

My Feedback: (4)

Primer bulb carbs have an extra hole in the fuel chamber, you can't just put a primer bulb on a carb that wasn't designed for one..If you put a flat plate on a primer bulb the hole has to be plugged...I tap the hole and put a 2-56 screw in it and cut it flush..
The primer bulb is there to draw fuel into the carb from the tank, the extra hole and fitting returns excess fuel to the tank from the extra carb fitting when the chamber is filled....
The choke completely closes the venturi, theoretically closing the throttle completely should do the same thing,,,

Fulcrum2111

Excuse me, but I don´t get it fully.

I have three lines in my fuel tank, one to the carburetor, other to fill it and the vent line. How is the return line from the primer bulb directed to the tank again?

captinjohn

Place a Tee in the line from primer to fuel tank. The "T" will give you a way to fill tank & let the fuel flow back to carb from emgine. Capt,n

Fulcrum2111

Is the Tee placed in the tank to carb line or in the bulb to tank (return) line?

w8ye

My Feedback: (16)

It can be either place but must be kept plugged when not filling the tank

captinjohn

Place the "T" in the from bulb (primer) to tank return. It always helps to draw it out on paper. Write what each line goes to and the direction of flow. The 'T" you keep plugged....except to pump fuel in.

Antique

My Feedback: (4)

The return to the tank is for weedeaters, not needed on the airplane...If you use a primer bulb carb the excess fuel will just spill out, you can put a line on it to get the fuel out of the cowl....
Three lines are not necessary, just put a T fitting in the line from the tank to the carb...Plug it after fueling....K I S S principle....