Chainsaw Repair

These carbs have a angled mounting bolt pattern and not horizontally straight across.

They will also adapt to the old style 372 if you use the 385 boot and 372XT filter elbow with the baffle removed but you best have some porting on a big bore.

The RWL4 was originally intended to have mainly plain air going through the top half of the throttle body above the butterfly for the strato charged setup on the XT.

Anyone have the 365xt carb model number, wanna try one on the 7900

Thk, Adam

RWJ 4 is correct.  19.04mm venturi IIRC. 
Shep

The RWJ-4 has a divider in between the choke shaft and the throttle shaft. It is difficult to see. It is made that way for the strato. So one half the carburetor is dry.

But most people say to leave the divider in there when Using on a big bore old style 372.

The carb screws have a spline around their outside. This is the same spline as the splined screw driver for the small saws.

There is a spring loaded collar sleeve under the head of the screw that works as a limiter. The splined screw driver pushes this collar out of the way so you can adjust the carb as if there was no limiter.

You can also take the carb screws out and throw away the sleeves or you can mount the sleeves on a mandrel and cut the tabs from the sleeves so the limiter function no longer works and adjust the screws with a flat screw driver. 

660, you are correct, the divider IS still there, but it sure is hard to see. Does not look to be a big deal to remove it. Any suggestions?