O.S. Speed 21ZX-B Spec II Ty 110% Engine

Tower Stock# LXGUZX  •  Manufacturer Stock# 1217D
O.S. Speed 21ZX-B Spec II Ty 110% Engine (large view)
Notes from our tech department:
**Additional Technical Info Will Be Added When It Becomes Available.**
This is the O.S. Speed 21XZ-B Spec II Ty Tessmann Edition 110% Long Stroke
Glow Engine from O.S. Engines.

FEATURES

0.16" (4mm) lower cooling head lowers center of gravity for improved
handling
Slide valve carburetor with 7mm venturi insert for greater power and
less fuel consumption

INCLUDES

21XZ-B Spec II Ty Tessmann Edition 110% Long Stroke Glow Engine

REQUIREMENTS

Glow Fuel: 10-30% nitro content, 20% recommended for break-in
Tuned pipe such as the O.S Engines T-2090SC, OSMG2953
Glow Starter and Track Equipment

SPECIFICATIONS

Engine;
Displacement: 0.213 cu in (3.49 cc)
Bore:
Stroke:
Practical RPM:
Power Output:
Weight:
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:
Width at Mounting Tabs: 1.8" (45mm)
Width of Crankcase below Mounting Tabs: 1.2" (31.6mm)
Distance from Backplate to Front Bearing:
Distance from Center of Crankcase to Front Bearing:
Distance from Center of Crankcase to Backplate:

jxs 07/28/17

Resources
Easy RC: Engines
Manufacturer Product Web Page
Manufacturer Mailing Address
Additional Manufacturer Contact Info