Coleman T-196. jack shaft junk

[nk49]

I am dealing with the same issue and can't figure out how the shafts came out of alignment. Here is a picture of the jackshaft and the axle sprocket and the alignment is off by about 1/2". Just enough to cause the chain to snap. The jackshaft is welded and the axle sprocket doesn't appear to move at all either. I thought of putting a washer behind the sprocket to move it over but I can't seem to get the sprocket to separate with the bolts removed. Seems like there is a keyway blocking it and I can't figure it out.

I finally got back to the Kart and I was able to move the axle sprocket over *just* enough to get it to line up pretty closely, but I thought the same thing. Considering putting a washer or washers behind the sprocket to slide it over the final 1/8”.

 

[nk49]

So I figured out a solution. I took off the jackshaft sprocket and placed a washer behind it and that moved it over to align it with the axle sprocket. The kids rode for 3 hours with no issues so far!

Ok, this looks like a pretty good idea. Is it still working out?

 

[OneBadZL1]

Unfortunately the chain continues to come off no matter what I do. I have replaced the sprockets and chains on both sides and the chain still pops off within a couple of minutes of riding. At a loss as to what to do. I am not much of a fabricator and don't have the equipment to cut and replace the jackshaft assembly. Maybe new bearings are needed?

 

[Kartorbust]

Your sprocket alignment is probably off just enough, to kick the chain off. You'll need to get a straight edge and check the alignments.