#38000 O.S. Engine – OS GT55

This is the O.S. GT55 Gasoline Engine with Electronic Ignition Unit, Brand New
in Box.

Introducing the first O.S. gas engine-designed especially for R/C!

It is similar in appearance to other O.S. 2-cycle engines, with a large number
of extra-deep and -thin cooling fins on the crankcase and head. A unique 1-piece
crankcase design eliminates gaskets and enhances strength and precision.

A unique front-mounted carb, however, provides several performance benefits.

• Better carburetor cooling, for more consistent engine runs and high performance.
• Requires shorter standoffs, which results in more secure installation (mounting)
  and less vibration overall.
• Very simple, direct installation of the throttle and choke linkages.

Another major performance benefit is the IG-01 Capacitive Discharge Ignition.
Developed from proprietary O.S. technology, it uses a microcomputer programmed
for optimum spark advance. Magnetic sensors on the crankcase and prop drive
detect ignition timing. The IG-01 also detects and compensates for wet plugs,
ensuring quick starts. Designed to accept a wide range of input voltages, the
IG-01 requires minimal current in standby mode and features a low-voltage warning
(intermittent engine operation).

Features:

• IG-01 Capacitive Discharge Ignition uses a microcomputer programmed for
  optimum spark advance through the use of magnetic sensors on the crankcase
  and prop drive, the IG-01 also detects and compensates for wet plugs to ensure
  consistent quick starts, also requires minimum current in stand-by mode and
  features a low voltage warning (intermittent engine operation)
• Front mounted carburetor stays cooler for less heat percolation and more
  consistent performance, simple and direct throttle and choke linkages
• Unique one-piece crankcase eliminates gaskets and enhances strength and
  precision
• Front induction rotary valve crankshaft design for positive opening and
  closing of valve for optimum timing, no oil seal required which eliminates
  RPM loss due to additional friction
• Massive front and rear crankshaft bearings for longer life and maximum power
  output
• Thin high-performance piston ring and high-strength aluminum alloy piston
  for reduced break-in and high compression from the very first run

Includes:

O.S. GT55 Gasoline Engine with Electronic Ignition, Carburetor, CM-6 Spark
Plug, four Mounting Standoffs, Prop Washer with four 5x40mm Socket Head Cap
Screws, Instruction Manual

Specs:

• Displacement: 54.93cc (3.325 ci)
• Bore: 41.2mm
• Stroke: 41.2mm
• Practical RPM: 1,500 – 8,000

Suggested Propeller:

• 20×10 – 22×10, 24×8