GT55 Gas Engine

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

It's 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).

Other benefits include:

• No oil seal is required, eliminating rpm lost due to additional friction.
  
  

A front-induction, rotary-valve crankshaft, which ensures that the valve is opened and closed for optimum timing.	Massive front and rear bearings, for longer life and maximum power output.	A thin, high-performance piston ring and high-strength aluminum alloy piston, for reduced break-in and high compression from the very first run.