Opposed twin running wild

[Jharbin]

Ok...so I think I reached the last page of the Internet with this one and can't figure this out. Have a B&S 422437 type 1281 01 that was running and just died. Thinking it was carb related, I cleaned carb. No luck. Checked spark and it had weak spark. Checked fuel pump....had plenty of pressure, but I did clean the pump too. Ended up being coil after all. Replaced coil and put back together. Started right up, but was screaming. Multiple write ups suggest governor adjustment, but I've adjusted both ways and no luck. Throttle seems do do very little (if anything). I can idle it down by turning in the fuel mixture screw, but still no throttle response. Any ideas? I'm stumped.
Trying to attach pics, but all were too large.

 

[StarTech]

Ok...so I think I reached the last page of the Internet with this one and can't figure this out. Have a B&S 422437 type 1281 01 that was running and just died. Thinking it was carb related, I cleaned carb. No luck. Checked spark and it had weak spark. Checked fuel pump....had plenty of pressure, but I did clean the pump too. Ended up being coil after all. Replaced coil and put back together. Started right up, but was screaming. Multiple write ups suggest governor adjustment, but I've adjusted both ways and no luck. Throttle seems do do very little (if anything). I can idle it down by turning in the fuel mixture screw, but still no throttle response. Any ideas? I'm stumped.
Trying to attach pics, but all were too large.

Ever thought of that it may be a Governor failure?

 

[Jharbin]

I have thought of that, but not quite sure how to determine without pulling engine apart. Any idea what would have caused governor to go out while replacing coil? Could I have misaligned something while reassembling the cover?

 

[Scrubcadet10]

The governor is a mostly internal system.. highly doubt replacing the coil affected it in any way.
i would make sure all of the linkages are hooked up correctly.

 

[StarTech]

The governor is a mostly internal system.. highly doubt replacing the coil affected it in any way.
i would make sure all of the linkages are hooked up correctly.

Things happen unexpectedly. Sometimes it is just way things are.

I just got through with Honda engine that was ran without oil. It took 3 three weeks to get parts and reassemble. Well the first expected thing that was the starter went out. It was cranking fine before I tore the engine down. Then on the second test mowing the engine started surging so it was an additional pop problem that wasn't there to start with. Finally it is out of the shop and back with the customer.

 

[Jharbin]

The governor is a mostly internal system.. highly doubt replacing the coil affected it in any way.
i would make sure all of the linkages are hooked up correctly.

I've watched this video a few times, I got this tractor second hand and I'm not sure that the carb is original. Nothing seems to match any of the manuals, pics or videos that I've seen. I just uploaded some pics to the original post. Hopefully they're clear enough to decipher.

 

[Richard Milhous]

Briggs governors are crap. Sometimes you can make them work acceptably by stretching/shortening springs. My Ultimate Solution is a "throttle" (made from a generic automotive manual choke cable) that manipulates the throttle - not directly, but by changing tension on the spring that opens the throttle. It also controls the ignition cut-off circuit, which is convenient if you've disabled the sissy bar.

 

[Richard Milhous]

ALSO: some Briggs coils have an interference with some Briggs air vanes. I just had to clip a bit off of an airvane to prevent runaway. The coil blocks the air vane, causing the governor to think the engine is about to stall and GIVE ME ALL THE GAS. See if the air vane has a full range of motion.