Description
Twin Disc MG-5090A Marine Transmission
The Twin Disc MG-5090A is a compact, vertical offset marine gear transmission featuring a hydraulically actuated, oil-cooled multi-disc clutch and down-angle output. It handles up to 447 kW (600 hp) at 2600 RPM in pleasure craft duty and is used in commercial and recreational vessels.
Key Specifications Twin disc mg 5090a marine transmission for sale
- Max Input Speed: 2500-2600 RPM
- Power Rating: Up to 600 hp (447 kW) for pleasure craft
- Dry Weight: ~500-575 lbs
- Rotation: Supports left-hand and right-hand propeller rotation
- Flywheel Compatibility: SAE 14″ or 11.5″
Routine Maintenance Schedule Twin disc mg 5090a marine for sale
- Every 250 Hours: Check oil level/condition, inspect linkages, verify mounting bolts, and check for external leaks.
- Every 1,000 Hours / Annually: Replace transmission oil and spin-on filters, flush oil coolers, and pressure test clutch engagement (target 250-300 PSI)
Common Troubleshooting Twin disc mg 5090a price
- Delayed Shifting / Overheating: Often points to a clogged suction screen, failing oil pump, or low fluid pressure.
- Milky Oil: Indicates water intrusion, typically via a compromised oil-to-water heat exchanger cooler
Mechanical Design & Housing Anatomy
- Construction: Heavy-duty, rigid cast iron housing designed to withstand extreme hull vibrations.
- Gear Design: Features premium helical gears precision-cut to jig-bore accuracy for exceptionally quiet operation.
- Down-Angle Output: Standard 7° to 10° down-angle configuration allows the engine to sit nearly level in the hull, optimizing internal vessel space.
- Clutch Accessibility: Engineered with unique top/side accessibility, allowing the hydraulic clutch packs to be completely serviced without removing the transmission from the engine flywheel.
