It's stated in the YM240 ops manual.
Some Yanmars came with bottle that has to be filled and some came with bottle filled by injector leak by. Some came with neither .
Norm.....any chance you could post that page. I sure would like to see it.
Step #6.
No idea why anybody would use a thermal start to clatter a cold engine to life ? Plug in the block heater instead .
Added 3 more pages out of operation manual in post #24.