Hi everyone, here's some experiences with my FS200:

POSITIVE
- Reliable, starts easily with a starter, I also successfully hand started it
- Uses very little fuel, runs about 10 minutes on 350ml with mixed throttle settings
- Low vibration for an engine of this size
- Quiet with standard muffler

NEGATIVE
- Performance could be better (7700 to 8200 on Graupner Sonic 18x8)
- Oil loss through the hole on the back of crankcase - did have to put a wooden plug in it to stop this

ISSUES
- I do loose power after some time when the engine runs full throttle - I believe it is an overheating problem
- The cylinder head (intake/exhaust, valves) is a bit hidden behind the cowling, the rocker cover is in the airstream as well as the cylinder below the head (see picture)

Does anyone have similar issues with power loss when hot? If the engine is cold, my Yak takes off after 10ft, if its hot it barely hovers.

Thanks for posting.

Cheers,


Christoph