22 HP VTwin Intek Mystery Fuel Issue

[saltlife977]

I've run this engine for 9 years without issues until suddenly the carburetor flooded and stalled out the engine. So I rebuild the carburetor nice and good and install it. Ran strong the entire mowing session but when I came back to start it after weed trimming, I saw the plastic intake was dumping fuel from the two nozzles and right back into the valve cover. Okay, so yet another thorough rebuild. Same issue. Went and bought a brand new carb, looked like it was missing the throttle plate return spring and had part of the spring stopper broken off the carb too.

Here's the second problem: I send it back thinking it was a fluke but I go an exact same carb with no spring and again...looking like a piece of the spring stopper broke off. My Kikki original carburetor has a spring the throttle attaches to which returns the plate to an open position until the engine turns on. I'm not sure if they redesigned the carb but I tossed the newest one on anyway and it sounds like garbage under full throttle. Like it's once again getting way too much gas. In fact you can smell the chooch. Very rich smelling. Half throttle makes her happy. Engage the blades? Engine vibrates and almost stalls out from the load especially full throttle. I have not a faint effing clue as to what's going on but I think i get why Briggs and Stratton went bankrupt. Their quality went down the toilet. When I pull the fuel pump pulse line, some oil seeped out from the hose but I take it that's somewhat normal? Otherwise I don't see fuel being dumped from the line. Besides, the valve cover with this pulse line never flooded...only the opposite valve cover. Engine model is a 407777-2217-G5 and the replacement carburetor B&S showed to fit was the 791230 model (manual choke). All of the new carburetors show no spring. I'm at a complete loss here.

The new carb was bought off of Amazon since B&S have a store page on there and I circled the picture that even shows where the spring on my old one used to be and how it looks broken off even in the pic. Notice how there is only one hole for the linkage...my old one had two. In fact my original linkage would not fit without binding because the hooked end of the linkage would not clear that 90 degree bend you see next to the hole. I trimmed off the hooked end a little so it could fit. It's almost like this is not the right carburetor at all. Hell, even the fuel cutoff solenoid looks different.

 

[StarTech]

First you appear to be confused. That is the choke shaft and not the throttle shaft. Also you dont the choke return spring as there no slack to be taken up off choke position.

It is very possible that you are trying install the carburetor backwards.

 

[bertsmobile1]

Further to what Star said, the only springs that ever come with those carbs is a clock spring on the choke to hold it open.
Because the air flow on the V twins is in effect backwards a lot of people get them confused.
Did you buy a certified good carb from a mower shop or specialist mower parts retailer with their own web site, or the cheapest one you could find on Ammozone ?
Ammozone is the prefferred vendor for slease bags selling stuff they bought as scrap metal because it was faulty as "fits" or "OEM" .
Get you rebuilt carb and tip it upside down and try to blow through the fuel intake.
It should resist about 10 psi
Slip it back on the mower without the float bowl attached , hook it up. move the plugs out of the way . or put a ground jumper on both coils to avoid a spark & potential fire
Get some one to crank the engine while you work the float with the engine spinning the flow of fuel should stop before the float gets to the end of it's travel .
As the engine has flooded out twice I would be looking at the fuel lines from the filter through to the carb.
Drain the entire fuel tank and check for water .