Twin Disc 509 2-1 for Sale
Running takeout Twin Disc 509 2-1 for sale. #1 housing. 225 lbs. pressure forward and reverse. Ready to go. Will install on test engine and spin test for interested buyer. Located in NC. $5,500 #102
Contact me at [email protected] with any questions
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The Twin Disc MG-509 is a marine transmission designed for medium-duty marine applications, such as yachts, fishing boats, and workboats. It’s known for its durability, smooth operation, and compatibility with a range of marine diesel engines.
Key Specifications of Twin Disc MG-509
Model Variants:
MG-509 SC (Shallow Case): Compact design, lighter weight.
MG-509 DC (Deep Case): Larger oil capacity, suited for heavier-duty applications.
Gear Ratios:
SC: 1.45:1, 2.00:1, 2.95:1.
DC: 3.8:1, 4.5:1.
Power Capacity: Rated for up to 390 hp at 1800 RPM, depending on configuration and duty cycle (e.g., pleasure craft vs. commercial).
Oil Capacity:
SC: 2.2 U.S. gallons (8.3L), plus hoses and heat exchanger.
DC: 3.5 U.S. gallons (13L), plus hoses and heat exchanger.
Oil Pump Capacity: 8.0 GPM at 1800 RPM; 10.6 GPM at 2400 RPM.
Maximum Speed:
SC: 3000 RPM (2350 RPM with drive ring A6911).
DC: 3000 RPM with specific drive rings (B5005, 215041, A6441-A); 2300 RPM with A6911.
Weight: Approximately 715 lbs (estimates vary by configuration).
Bell Housing: SAE #1, compatible with engines like Caterpillar, Cummins, or Detroit Diesel.
Drive Type: Typically spider or rubber block drive coupler for vibration dampening