B&S 500 Series 158cc

[Afd001]

Hello. First time here and bringing problems not solutions...Above would not run and diagnosed carb issue and replaced Unfortunately I suspect I didn't put linkagea back together again properly. Can any adult here please confirm/deny my suspicion? Regards etc

[Mick]

Hi, and welcome to TGMForum.

The control cable would normally go in the small hole next to the one it's in now. 

The governor spring is fitted in the right place but isn't the right spring. it should have a loop on one end where it goes on the control, and a hook on the other end going onto the carb.

Also looks like Amazon or similar after market carb. I would check that the throttle rod isn't too tight a fit in the throttle shaft, it looks pretty snug to me.

[openspaceman]

Hi Mick, it has been a while again. I have a similar picture of a B&S carburetor linkage but can't see how the choke works, is it applied by the throttle cable position and the various bit of linkage knock it off when the throttle is opened or is a plastic choke control missing from the centre of the choke butterfly I have marked in bright red?


The mower is a Masport 950, the lady could not start it but as soon as I flipped the choke butterfly on its over-centre spring arrangement it fired immediately but I had to flip it over-centre the opposite way to open the choke. I just wonder if a choke control lever is missing.

[Mick]

@openspaceman The linkage is all there and looks fine.  I can't see from the image if anything else is bent because of the tight image crop. If you could attach another image showing a bit more of the linkage it would help.

But basically that metal tab just to the right of the choke shaft should catch on the edge of the opening and flip the choke shaft on / off. It could be that the linkage is hitting the rest of the bracket before the tab reaches the shaft, (tab is bent too far back) or the shaft is stiff.

Edit:  Just had a quick search on Youtube to see if anyone had posted a video, found this one which shows exactly what I was saying. https://youtu.be/USx5IMxLiBQ?si=dR__Oz7Xjn3NhOxx