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12180 O.S. 21XZ-B ABC w/21J2 Carb

$ 4,780.00

This is the O.S. 21XZ-B ABC Engine with 21J2 Carburetor for 1/8 scale Off-Road Buggy Racing.

****** Because of the expressed racing nature of this engine, ******
******     it is NOT covered by the O.S. 2 Year Warranty      ******
******               per page 8 of manual.                    ******

FEATURES

Tungsten-weighted silicone filled crankshaft creates optimum balance  for consistent low and mid speed torque ABC piston and liner construction “A”luminum piston fitted to a “B”rass cylinder liner that is “C”hrome plated 21J2 slide valve carburetor with 7mm carb reducer that restricts the airflow helping to increase the amount of torque produced.

 

INCLUDES

O.S. 21XZ-B ABC On-Road Engine with 21J2 Carburetor, Exhaust Gasket, P3 Turbo Ultra Hot Glow Plug, 7mm Carb Reducer, Instruction Manual, and two Dust Caps

 

REQUIRES

Fuel: 10-30% nitro content, 20% recommended for break-in
Exhaust System: Depending on vehicle
Glow starter, fuel tubing and track equipment

SPECS

Displacement: 0.213 cu in (3.49 cc)
Bore: 0.640″ (16.27 mm)
Stroke: 0.661″ (16.8mm)
Practical RPM: 4,000-40,000
Power Output: 2.55 hp @ 33,000 RPM
Weight: 12.52oz (362g)
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″ (86.3mm)
Width of Mounting Tabs: 1.8″ (45mm)
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, NOTE carburetor is preset at factory and requires very small adjustments
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

 

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