@ Lister Rob
My 6/1 Startomatic manual lists 2 different combinations for V and Hz.
One is 230V @ 50Hz. the other is 110V @ 60Hz. I believe the 230V is not split phase as is used here in Canada.
If your set is producing straight 230V, then it would probably let the smoke out of most 110/120V rated appliances, regardless of Hz
There are different specifications for 110V 60Hz and 230V 50 Hz field coils and other voltage regulating parts, so a simple RPM increase might not do the trick either. I also have a 6/1 starto, rebuilt the engine, but have not tried to resurrect the generating gear. An Utterpower PMG is belted up and works fine, though the automatic starting is lost.
What's your location in Canada?
Cheers
Hugh