O.S. Engines 1/8 scale Buggy Engine .21XR-B (P) OSM12200
OSM12200 O.S. Engines 1/8 scale .21XR-B (P) Buggy Engine.

O.S. Engines 1/8 scale Buggy Engine .21XR-B (P) OSM12200

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This is the O.S. Engines 1/8 scale .21XR-B (P) Buggy Engine.

Features:
  • Natural finish crankcase
  • Shares the same basic layout as the O.S. 21XZ-B and can be upgraded with 21XZ-B parts
  • 22(B) slide valve carburetor

Includes:
One O.S. Engines 21XR-B ABC Buggy Engine with Slide Valve Carb, Glow Plug, Exhaust Seal Ring, two Dust Caps, and an Instruction Manual

Requires:
Fuel: 10-30% nitro content, 20% recommended for break-in
Exhaust System: Depending on vehicle
Glow starter, fuel tubing and track equipment
Displacement: .213 cu in (3.49cc)
Output: 2.45 PS, 2.61 HP/33,000RPM
Practical RPM Range: 4,000 - 40,000
Bore: 0.641" (16.27mm)
Stroke: 0.661" (16.8mm)
Weight: 13.5oz (370g)
Crankshaft Size: UNF1/4-28
Distance Between Mounting Holes Same Side: 0.83" (21mm)
Distance Between Mounting Holes Opposite Side: 1.45" (37mm)
Height Bottom of Mounting Tabs/Top of Cylinder Head: 3.4" (86.5mm)
Width at Mounting Tabs: 1.8" (45mm)
Width of Crankcase below Mounting Tabs: 1.2" (31.6mm)
Distance from Backplate to Front Bearing: 2.5" (64.5mm)
Distance from Center of Crankshaft to Front Bearing: 1.7" (44mm)
Distance from Center of Crankshaft to Backplate: 0.81" (20.5mm)

Carburetor Settings
Needle Valve:
Approximately 3.5 turns open from fully closed
Throttle: Approximately 0.5mm open from factory setting with reducer removed
Metering Needle: Rotate until slotted head is 1.5mm away from ball link body
Mixture Control Valve: Rotate until slotted head is flush with carb body

Note: The carburetor is preset at factory and requires very small adjustments

Review Summary