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General| Bore | 72 mm |
|---|---|
| Stroke | 61 mm |
| Type | 2-stroke, 2-cylinder |
| Maximum Power | 50 hp (37 kW) at 6500 rpm |
| Ignition | Electronic |
| Oil | 2-stroke oil |
| Fuel System | Carburetor |
| Reduction Gear Ratio | 2.58:1 |
General safety guidelines for operating the engine and ensuring user safety.
Introductory remarks about the ROTAX engine and its design.
Essential checks before starting the engine to ensure safe and proper operation.
Detailed steps for starting the ROTAX 503 UL engine.
Instructions for the initial break-in period of the engine.
Step-by-step guide for correctly mixing fuel and oil for the engine.
Description and overview of the BING carburetor used on the engine.
Overview of the engine's dual ignition system.
Diagram illustrating the wiring connections for the ignition system.
Details on installing an electric starter on the Power Take-Off (PTO) side.
Information about the electronic tachometer for engine RPM monitoring.
Schedule outlining routine maintenance tasks and intervals.
Instructions for checking and replacing the rewind starter cord.
Maintenance procedures for the engine's cooling system, including V-belt.
Guidance on identifying and resolving common engine problems.
Comprehensive technical specifications and operational values for the engine.
Important torque values for engine assembly and maintenance procedures.
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