O.S 13646 .21VG(P) ES w/New 21F
Carb
This is the O.S. Max 21VG (P) ES
Electric Start, Rear Exhaust Monster Truck and Buggy Engine with the 21F Slide
Valve Carburetor.
Excellent mid-range power for 1/8
scale buggies and trucks to compete in ROAR sanctioned events.
Features
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O.S 13646 .21VG(P) ES w/New
21F Carb
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Preinstalled E.S. Starter
backplate is designed to use the Duratrax Kwik-Pit Super Start for the HPI
Savage or the HPI Roto Starter System (HPIP8711)
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Advanced Bi-Metallic Liner (ABL)
cylinder liner construction This process uses a double layer of plating
material rather than one thick layer. This helps the metal bond to the
cylinder and is more durable. Also, the plating process is more consistent,
resulting in a more precise fit between piston and sleeve for better
compression and longer life.
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Machined aluminum piston,
3-port cylinder liner and double bushed knife edge connecting rod
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21F two needle slide valve
carburetor with insulated sleeve to
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prevent fuel vaporization
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SG (pilot) type one-piece
crankshaft
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Two year limited warranty
through manufacturer
Specifications
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Displacement: 0.211 cu in
(3.46cc)
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Bore: 0.654" (16.6mm)
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Stroke: 0.63" (16.0mm)
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Practical RPM: 3,000-36,000
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Power Output: 2.0 ps/30,000
RPM
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Weight: 15.27oz (433g)
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Crankshaft Size: 1/4-28
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Factory Needle Valve Setting:
2.5 turns open from closed position
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Mixture Control Valve Setting:
Adjust so that carb is approximately
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1mm open at idle
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Metering Needle Valve Setting:
Flush with the ball link body
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Distance Between Mounting
Holes Same Side: 21mm (.83")
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Distance Between Mounting
Holes Opposite Side: 37mm (1.5")
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Height Bottom of Mounting Tabs
to Top of Cylinder Head: 87.4mm (3.4")
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Width of Mounting Tabs: 45mm
(1.8")
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Width of Crankcase Below
Mounting Ears: 30.8mm (1.2")
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Distance from Front Bearing to
end of Crankshaft: 29.5mm (1.2")
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Distance from Center of Engine
to Front Bearing: 44mm (1.7")
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Distance from Center of Engine
to Backplate: 21.3mm (.84")
Contents
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O.S. Max 21VG (P) ES Electric
Start Monster and Buggy Truck Engine, 21F carb, illustrated manual, exhaust
manifold seal, #8 glow plug, and preinstalled E.S. Starter backplate
Requirements
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Duratrax Kwik-Pit Super Start
System or the HPI Savage Roto Starter System (HPIP8711)
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Car blend nitromethane fuel
with 10-30% nitromethane content, 16% nitro content recommended as starting
point
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Most of the fuels we carry
meet or exceed the lubricant content required for optimum performance and
maximum engine life. In the past, the conventional lubricant content used in
fuel was 18%. But with new advanced technologies, fuels like Red Alert and
O'Donnell for example, have a better quality of lubricants even though the
percentages of lubricant content are lower. These high-tech lubricants
provide exceptional cooling and protection.
Comments
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Some notes on Slide Valve and
Rotary Carburetors:
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Rotary Carbs offer a larger
response in the middle of the power band. This works well for off-road
applications when throttle response must be varied.
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Slide Valve Carbs provide
greater response at the beginning and end of the power band. This works well
for on-road and racing applications for fast take-offs and high speed.
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