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Twin Disc MG 509 4.50:1 Ratio Gearbox Marine
$12,350.00
Used Twin Disc MG 509 4.50:1 Ratio Gearbox Marine Perfect Condition (Refurbished)
Used Twin Disc MG 509 4.50:1 Ratio Gearbox Marine Perfect Condition (Refurbished)
Twin Disc MG-509 (4.50:1 ratio) is a heavy-duty marine transmission rated for approximately 175 kW (235 hp) at 1800 rpm. Designed for marine diesel engines, it features hydraulic wet-running clutches, a deep-case design for higher reduction ratios (3.83:1 to 4.95:1), and high-strength alloy steel gears, ideal for continuous-duty applications.
SPECIFICATION
Model: Twin Disc MG-509
Ratio: 4.50:1
Input Power Rating: 175 kW (235 hp) @ 1800 rpm
Maximum Input Speed: 3000 RPM (rated), 2300 RPM (with specific driving rings)
Clutch Type: Hydraulically actuated, oil-cooled, wet-running clutches
Capacity: Full horsepower continuous duty in forward or reverse
Housing : Available in SAE No. 1 or No. 2
Lubrication: Raw/Freshwater cooled
Weight: 800 lbs (363 kg)
Rotation: Full reversing capability for left- or right-hand propellers
Options: Trolling valve, top PTO, trolling valve capability
Lubrication & Cooling
Recommended Oil: Marine-grade SAE 30 or SAE 40 engine oil
Operating Pressure: 175 to 200 PSI at 1800 RPM
Cooling: Requires an oil-to-water heat exchanger or oil-to-air cooler
Oil Pump: Internal pressure lubrication
Optional Features
Top PTO: Often equipped with live Power Take-Off (PTO)
Trolling Valve: Available for precise, low-speed maneuverability
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