Description
ZF 350 2.077 Gearbox
The ZF 350 (IRM 350) with a 2.077:1 gear ratio is a heavy-duty marine transmission typically rated for up to 324–482 kW (434–647 hp) depending on the duty cycle (light or commercial duty) at around 1800–2300 rpm. It weighs roughly 260–300 kg dry and features integrated hydraulic clutches and oil filtration.
Key Specifications
- Manufacturer: ZF Marine
- Model: ZF 350 / IRM 350 series (including variants like A or AL)
- Gear Ratio: 2.077:1
- Power Capacity: ~324 kW (434 hp) at 1800 RPM (continuous/medium duty) up to ~482 kW for light duty
- Dry Weight: ~260 kg to 300 kg
- Common Applications: Commercial and recreational marine propulsion setups paired with high-output diesel engines
Operational Performance Rates
- Continuous Duty Rating (Commercial): 324 kW (434 hp) at 1800 RPM.
- Light Duty Rating (Recreational/Yacht): Up to 482 kW (647 hp) at 2300 RPM.
- Input Configuration: Standard reverse reduction marine transmission equipped with an internal hydraulic multi-disc clutch setup.
- Rotation Suitability: Fully reversing capability. It supports identical torque capacity and ratio deployment in both “ahead” (forward) and “astern” (reverse) engine directions, enabling twin-engine configurations with automotive-rotation engines.
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