O.S. Engine OSMG0830 FS-30S Surpass 4-Stroke Performance Upgrade  [OSMG0830]

O.S. Engine FS-30S Surpass
Price:
CAD$287.91
Brand:
O.S. Engine
Model:
OSMG0830
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Step Up Power and Efficiency with the FS-30S Surpass

RC pilots seeking a straightforward performance increase will appreciate the O.S. Engine FS-30S Surpass. Built for .26-size mounting patterns, this compact 4-stroke delivers about 20% more power than the FS-26 while maintaining quieter running and better fuel economy within the same footprint.

Where the FS-30S Shines

Whether installed on a Great Planes Piper J-3 Cub .20 or fitted to a T-Craft, the FS-30S Surpass lets you use larger propellers for added thrust and a richer engine note. Its ringed piston and rear updraft carburetor improve compression and throttle response, and the dual ball bearing crank with helix gear-driven camshaft keeps operation smooth and dependable.

Specifications

  • Displacement: 0.299 cu in (5 cc)
  • Bore: 0.767 in (19.5 mm)
  • Stroke: 0.648 in (16.4 mm)
  • Practical RPM: 2,500-13,000
  • Output: 0.5 hp @ 10,000 rpm
  • Weight: 9.2 oz (261 g) w/o muffler; 9.8 oz (278 g) w/muffler
  • Includes: Muffler, glow plug
  • Recommended Props: 9x6, 9x7, 10x4, 10x6

The O.S. Engine FS-30S Surpass is a compact upgrade for hobbyists who want improved climb and cruise without reworking mounts or cowlings. Its balance of extra power and modest size suits both relaxed flying and basic aerobatics.

Will this engine bolt into my current .26-size mount?

Yes. The FS-30S Surpass uses standard .26-size mounting dimensions so you can usually install it without changing the engine mounts or firewall holes.

How should I choose a prop for engine break-in and regular flying?

Start break-in with a slightly richer mixture and one of the recommended props like a 9x6 to keep RPM in the right range. After break-in, test 9x7 or 10x6 combinations to match your airframe and flying style.

Is special tuning required for the carburettor?

Basic needle adjustments are sufficient. The rear updraft carburettor offers usable range out of the box, but fine tuning for altitude and prop load will give the best throttle response.

What maintenance should I expect with the FS-30S?

Routine care includes checking the head and mounting bolts, keeping the carburettor clean, and following a break-in and regular running schedule to maintain peak performance.

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