The 604D4-FI is a opposed four-cylinder, two-stroke engine utilizing a belt driven propeller reduction unit and digital fuel injection. The engine has a 500 or 750 watt, 28 volt alternator option and larger alternators can be adapted. A direct drive version is currently in development, and will still incorporate the fuel injection system.

Key Features:

• Belt driven propeller reduction unit to reduce the propeller noise of large diameter props.
  
• Digital fuel injection to increase fuel economy and altitude compensation of fuel mixture.
  
• Anodized aluminum parts and stainless steel hardware to protect against corrosion.
  
• Carbon fiber reed valves for increased performance and durability.
  
• Carbon fiber spinner with integrated spinner back plate and propeller hub.

Specifications: