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OS Engines R21 1/8 On-Road Club Racer OSM1B900 Engine
- $159.14
- Brands O.S.
- Product Code: OSM1B900
- Availability: In Stock
This is the O.S. Engines R21 engine for 1/8 scale on-road club racers.Includes:R21 Engine with 21M2 Slide Valve CarburetorRP7 Turbo Glow Plug8.5mm Carb Reducer Dust Cap SetInstruction ManualRequires:Fuel: Car blend, 25% nitro content recommended for break-inExhaust System depending on vehicleO.S. Engines T-2080C Tuned Silencer Set (OSMG2983)Glow StarterTrack EquipmentFeatures:Nine fin a..
Powerful 1/8 On-Road Engine for RC Racing Club and Hobby Use
This is the O.S. Engines R21 engine for 1/8 scale on-road club racers.
Includes:
- R21 Engine with 21M2 Slide Valve Carburetor
- RP7 Turbo Glow Plug
- 8.5mm Carb Reducer Dust Cap Set
- Instruction Manual
Requires:
- Fuel: Car blend, 25% nitro content recommended for break-in
- Exhaust System depending on vehicle
- O.S. Engines T-2080C Tuned Silencer Set (OSMG2983)
- Glow Starter
- Track Equipment
Features:
- Nine fin anodized aluminum cylinder head in blue
- 21M2 slide valve carburetor with 8.5mm reducer
- Silicone filled crankshaft
Specs:
Displacement: .213 cu in (3.49 cc)
Bore: 0.633 in (16.08 mm)
Stroke: 0.677 in (17.2 mm)
Output: 2.75ps / 2.71 hp / 32,000 RPM
Weight: 12.35 oz (350 g)
Practical RPM: 4,000-44,000
Crankshaft Size: UNF 1/4-28
Distance between Mounting Hole Centers Same Side: 0.83" (21mm)
Distance between Mounting Hole Centers Opposite Side: 1.4" (37mm)
Height Bottom of Mounting Tab/Top of Cylinder Head: 3" (75.6mm)
Height Bottom of Crankcase/Top of Cylinder Head: 3.6" (91.2mm)
Height Bottom of Mounting Tab/Exhaust Outlet Center: 1.1" (28mm)
Length from Cover Plate to Front Bearing: 2.5" (64.5mm)
Length from Cover Plate to End of Crankshaft: 3.7" (94mm)
Length from Cover Plate to Center of Crankcase: 0.81" (20.5mm)|
Length from Crankcase Center to Front Bearing: 1.7" (44mm)
Length from Crankcase Center to End of Crankshaft: 2.9" (73.5mm)
Carburetor Settings
- Needle Valve: 3 turns open from fully closed
- Mixture Control Valve: Flush with carburetor body, adjusting range within +- 1 turn
- Metering Needle: Standard position, flush with ball link body
- Throttle: Approximately 0.5mm open from factory setting with reducer removed
