This document is a propeller installation guide for Marine Power products. It introduces three propeller installation methods: Flo-Torq I, Flo-Torq II and Flo-Torq III and Flo-Torq IV.
The document details the installation procedures for four models of Mercury Marine Flo-Torq propellers: Flo-Torq I, II, III, and IV. It outlines specific steps involving thrust washers, tab washers, and securing nuts to specified torques depending on horsepower ratings.
For each model series, the guide specifies compatible outboard motor brands (such as Mercury, Mariner, Honda, Yamaha) and provides a torque table in Newton-meters, lb-in, and lb-ft. It also includes critical verification steps to ensure the propeller is locked securely and does not interfere with the gear housing.
| 6–15 hp propeller nut torque (Nm) | 11.3 |
|---|---|
| 18–25 hp propeller nut torque (lb-ft) | 18.7 |
| 30–60 hp propeller nut torque (Nm) | 74.6 |
| Flo-Torq III/IV propeller nut torque (lb-ft) | 55 |
Compatible brands include Mercury, Mariner, Mercury MerCruiser, Force, Honda, Revolution 4, Tempest Plus, Trophy Plus, and Bravo I.
The specified torque is 74.6 Nm (55 lb-ft).