RE: Prop for a MVVS 40
Dennis,
If you basically know how to adjust a glow engine, you need no manual!
Just use fuel with 20% oil, of which at least half is castor oil.
Always run the engine dry, by removing/choking the fuel line at full throttle, at the end of the day.
After-run oil is extra insurance.
Adjust the engine to run at peak, 100-150 RPM richer than maximum, with the plane's nose pointing straight-up.
This means about 300 RPM rich with the plane level, but check it with the nose up!
This engine needs no maintenance as such, but disassembly requires metric Allen wrenches.
That new carburettor is available from MVVS dealers.
Unless the 'clicker spring' isn't functional, that high-speed needle will stay put...