Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

The drill start adapter appears to be a two piece, hub and spindle affair.  It exists in the CAD files that were public domain available when these Chinese guys found them.  I’m not sure it exists anywhere else.  This project went way overtime and I’m sure over budget. Fifty pieces isn’t a lot of money when you’re talking CNC and powder coat, as well as assembly and front bend costs.  So about the time  they were still undecided on the muffler, actually polled the community to vote tractor or straight pipe, and the carb was overdue, I think they deep six-ed the drill adapter. Best evidence they intended to include it but bailed, is the existence of the six mount holes in the flywheel.  They also backpedaled on the ignition, then played it off as an error.  The thing of it is, they’re still using the drawing with the adapter visible, and now say it’s optional on the drawing, but when I took them to task, engineers decided rope was sufficient.  Well dammit, the fuel door on your pickup isn’t necessary, but if it came through missing, most people would refuse delivery.  Little shortcomings sour relationships and cost in lost customer base.

I’m familiar with the starter.  What about a 4mm wide toothed timing belt?  They are used in printers etc.  they’re available, and would work either in a v notch, or on the outside of the flywheel, a dab of windex on the outside of the flywheel with a Q tip will provide traction so it grips.
I’m not using a starter, so I chose to drive the transmission with 6mm gt2 timing belt.  Some pulleys toothed, others, like the flywheel, simple drums.  I use nylon surgical sutures and superglue to splice them to length.