O.S. Engine OS-18510 - 91RZ-H DH Ring Engine with 60M-C Carburetor (Advanced Tune)  [OS-18510]

O.S #18510 - OS 91RZ-H DH Ring Engine w/60M-C Carb.
Price:
CAD$352.62
Brand:
O.S. Engine
Model:
OS-18510
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Compact Power for Scale Helicopters

Built for experienced pilots, the O.S. Engine OS-18510 brings precise power delivery in a compact package that fits neatly inside scale canopies. It provides reliable running for sport and scale flying while leaving room for careful setup and tuning.

Designed Around Accurate Throttle Response

The O.S. Engine OS-18510 features a diecast cylinder head and a ringed piston that improve durability and consistent performance. Its 60M-C carburetor uses a three-needle layout to allow detailed mid-range adjustments, giving you control over throttle feel during transitions and maneuvers.

Performance Overview

Specifications

  • Displacement: 0.912 cu in (14.95 cc)
  • Bore: 1.091" (27.7mm)
  • Stroke: 0.976" (24.8mm)
  • Practical RPM: 2000-16,000
  • Power Output: 3.3 ps @ 15,000 RPM
  • Weight: 22.0oz (623g)
  • Crankshaft Size: 5/16-24

For pilots seeking fine tuning and sturdy construction, the O.S. Engine OS-18510 delivers dependable performance and the adjustability needed for advanced RC helicopter setups.

Is the O.S. Engine OS-18510 suitable for a newcomer to RC helicopters?

It is aimed at experienced operators; however, a new pilot can use it if they get hands-on guidance for setup and tuning.

What style of helicopter works best with this engine?

Scale and sport helicopters with limited engine bay space benefit from the OS-18510's compact layout and power characteristics.

How should I approach tuning the 60M-C carburetor?

Start with conservative needle settings, warm the engine to operating temperature, then refine low, mid and high needles for smooth throttle transitions and consistent idle.

What routine maintenance keeps this engine at peak performance?

Regularly clean the carburetor, check head bolts and glow plug, and inspect the piston and sleeve for wear. Use after-run oil if storing the engine for long periods.

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