I've been contemplating fabricating a tow-bar for my 1991 8 hp unit w/elec start as well - quite heavy when pulling by hand and sure would be easier towing to the compost pile with my tractor. The closest I've come is this original parts diagram (link below)

Here is a link that might be useful: Super Tomahawk tow bar

Guess that link didn't work very well . . . here's a direct jpeg image - click to enlarge.

That's a very helpful picture. Thank you. Now, if someone can tell us the lengths of parts 1 and 4 -- we can start building.

Each leg of "1" is about 55" (including attachment tabs and measured to the end of the tow eye)

Part "4" is about 36.5"

That is great, thanks! With the picture and those measurements I should be able to make a tow unit at least as good as the factory job!

Glad to help a chipper fellow er ... ahh ... fellow chipper? Have fun. ;)

what happened to the picture?
need it desperately!!!!!

Here you go zimmersci . . .

Did you build a tow bar? Can you send me pictures and advice on how to build one. The only other dimension I think I need is the distance from part 3 to the front of the tow hitch.