Walbro Wdb Vs Wda

DLDeere · Post by **DLDeere** » Tue Oct 28, 2008 11:48 pm

What is the difference between the Walbro WDB-31 that is in the JD 300 Kohler and the Walbro WDA-32 on the JD 400 CCW?

I see a venturi on the WDA-32 but any other difference?

Will one provide better performance than the other?

And finally, any problem using the WDA-32 from the 400 CCW on the Kohler engine?

Howard

The Hunter · Post by **The Hunter** » Wed Dec 03, 2008 12:43 pm

I have the exact same 2 carbs, I'm going to try and get the wdb-31 carb going with parts from the wda-32.
I imagine there would jetting differences between the 2 since they are different motors. I think your 300 would run stupid rich with the WDA-32 carb

DLDeere · Post by **DLDeere** » Thu Dec 04, 2008 1:35 am

Hunter,
I've had the 300 running with the wda-32. Seems to be fine. I haven't had it on snow yet (we don't have any yet!) so it hasn't been on load, but I think it will be OK. I found out that the number is the size of the carb throat in millimeters. So the only difference in size is 1 mm. It fit fine on the 300 intake manifold.

I think the parts would be interchangeable, except the throttle and choke butterflies from the 32 may not fit into the 31.

Howard

ejazz · Post by **ejazz** » Mon Jan 12, 2009 4:48 pm

Howard-
Wondering if you have any more info on using the WDA-32 on your 300?

Rodimus Prime · Post by **Rodimus Prime** » Mon Jan 12, 2009 5:56 pm

venturi size is the biggest difference smaller engines 340 295 not a big performance gain. 400 - 440 go with the bigger opening to prevent starving. The walbro carb when working is actually a really good carb for trail running. wf carbs are a real pain but kinda neat in thier own way i have one somewhere.

The Hunter · Post by **The Hunter** » Tue Jan 13, 2009 1:52 pm

How well would a WDA-6 work on a 1977 Kolher 300?