2072 governor spring
 

Does anyone know what, if anything is the correct position for the governor spring on the 2072 with the M20? I'm having issues with it bogging down while just sitting still. I think it's just the death throes of the Walbro carb but want to eliminate all possibilities and I'm not certain the spring is in the correct place.

If it does it when it's not loaded, the governor setting has nothing to do with it. The initial or "factory" position is in the Kohler manual.

I'd say you need to clean your fuel system and rebuild/clean the carb.

A new carb is on order, I scoured the manuals and didn't find anything specific on the 2072 setting, just a couple pictures with the on engine throttle and a section that said something like "make sure the spring is in the correct position" but I will look again.

So I got the new carb put on and was adjusting it (waaaay better with the adjustable main jet, btw) and wanted to check my engine speed as the manual is specific about high and idle speed. I've acquired a tachometer but have to ask the n00b question, where does one measure the speed? Is it the bolt head on the pto pulley, the pulley itself, the fly wheel (a challenge on this motor but maybe doable) the drive shaft? Depending on where it's measured you will get different results, the outer edge of the fly wheel will be moving at a very different speed from the bolt head of the pto pulley. So where does one measure?

It will be the same anywhere, I promise. Yes they are moving at different speeds, but they are all making the same number of revolutions per minute (rpm). I assume you have an optical tach? Put a reflector on something that is easy to get to like the pto pulley.

Bill

Ah that makes sense, I thought myself into a corner there! The pto pulley it is! Thanks!

Did you find a new carb? Where did you get it?

http://m.ebay.com/itm/231887454289?_mwBanner=1

This is, as far as I can tell, an after market copy of a kohler 26 carb that went on the kt17 engine. It requires rerouting of the choke cable (I changed the throttle cable routing to) because the lever swings the opposite direction but it was fairly easy to do and the engine hasn't run this well as long as I've owned it. If I get a chance I'll post a picture of the new routing I used.

What do you mean you changed the routing on the throttle cable?

Why didn't you just change the choke shaft out with the original?....... That would have been easier.

The KT engines didn't actually come with a #26, but a #26 is really close.

I tried swapping the choke shafts but the screw holes didn't line up and the plates are very different. Here are some pics of what I ended up with.