The Yamaha 50 TLR has a three-cylinder, two-stroke motor that weighs approximately 189 lbs. It has a bore that is 2.6-inches, a stroke that is 2.6-inches, and a 20-inch long shaft with power trim and tilt. Water is run through a thermostatic control to cool the motor.
A minimum octane content of 87 is needed in the gasoline that powers a 50 TLR. The ignition system is electric and the induction system is a charged carbureted loop (exhaust goes through the prop). Yamaha 2M oil is the recommended lubricant used with the Yamaha 50 TLR.