O.S. Speed B21 Ty Tessmann II Engine

Tower Stock# OSMG2086  •  Manufacturer Stock# 1A209
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Notes from our tech department:
This is the O.S. Engines Speed Tuned B21
Ty Tessmann II 18 scale Buggy Engine.

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


Special 5.8mm carb restrictor supplied by O.S. to Ty for extending
run time in competition
Low profile cylinder head with new shape and double height vertical
fins compared to latest model of the B2102
Ty Tessmanns name is etched into the cylinder head, crankcase and
Silicone filled crankshaft with DLC (diamond like coating) with
balanced tungsten weights and optimal intake timing
slide valve carburetor


Speed Tuned B21 18 scale Ty Tessmann II Buggy Engine
Carburetor with 5.8mm Carb Reducer
P3 Turbo Glow Plug
3mm, 16mm and 18mm Dust Caps
Exhaust Seal Ring
Instruction manual


Glow fuel: 10-30 nitro content, 20 recommended for break-in
Exhaust system depending on vehicle
Glow igniter and track equipment


Displacement: 0.211 cu in (3.49cc)
Bore: 0.646 (16.4mm)
Stroke: 0.646 (16.4mm)
Practical RPM: 4,000-42,000 RPM
Output: 2.65ps 2.61hp 34,000RPM
Weight: 12.59oz (356g)
Distance Between Mounting Hole Centers Same Side: 0.83 (21mm)
Distance Between Mounting Holes Opposite Side: 1.4 (37mm)
Height Bottom of Mounting TabsTop of Cylinder Head: 3.2 (82.6mm)
Width of Mounting Tabs: 1.8 (45mm)
Distance from Backplate to Front Bearing: 2.5 (64.5mm)
Distance from Center of Crankcase to Front Bearing: 1.7 (44mm)
Distance from Center of Crankcase to Backplate: 0.81 (20.5mm)
Crankshaft Size: UNF14-28
Crankshaft Length: 1.2 (29.5mm) front front bearing
Carburetor Settings: NOTE carburetor is preset at factory and
requires only very small adjustments
Needle Valve, 3-14 open from fully closed
Mixture Control Valve, Flush with carburetor body
Metering Needle, Flush with ball link body
Throttle Stop Screw, Approximately 0.5mm

jxs 122717



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