http://www.youtube.com/watch?v=ymDJk6WnUkc

These are new in box, not used

                  85FS

DISPLACEMENT                 85ccm 5.8hp 

BORE                                 39,5

WEIGHT                           2900g 6.00lb

RPM                                 1000-6500

RPM                                 26x10 6300

IGNITIOR PROCESSOR CONTROLLED

FUEL GAS + OIL MOTUL 600 1:40

Shoshonrcmotor has selected the roto motor 35fs-85fs  single and boxer  four stroke engine to introduce customers to the Rotomotor experience.
We feel very confident you will agree this is the finest single and boxer four stroke gasoline model aircraft engine available.

The goal for the new 35fs-85fs four stroke engine was simple.
It must be easy to start, develop very good power, be fuel efficient, operate quietly and be extremely reliable.
Well, they succeeded!
Just look at the exploded parts diagram and you will see there is an extraordinary amount of technology packed into this little gem of an engine.
It truly belies its simple lines and clean exterior! The Roto 35 fs-85fs is very powerful and will easily surprise you.
We recommend the Roto 35 fs for any 1.20 plus sized warbird up to 20lbs or in 25-27% aerobatic aircraft up to 15lbs.

 Roto 85fs It really is the perfect choice for 1/3 scale aircraft such as Piper Cubs and 30-33% aerobatic applications.
Doing all of this while providing extreme fuel economy with very quiet operation.

 **a proper and adequate break in is required *

Engine Lubrication

The correct engine lubrication is achieved by adding engine oil to the gasoline in a 1:40 ratio which represents 2,5% of engine oil added.

Use 93-98 octane gasoline. The engine oil used should be high performance two stroke engine oil.

Warning! To achieve long lasting engine performance always use high performance superior quality engine oil!

 Thanking you in advance for your honesty and interest.

Best regard Shosho