RADHLBNIU Outboard Propeller 13.25 x 17 RH 3-Blade 15-Spline Replacement for Mercury & Force (Black, Heat-Treated)

RADHLBNIU's 13 1/4 x 17 pitch right-hand outboard propeller is a three-blade, 15-spline replacement designed to fit a wide range of Mercury and Force outboard engines.

This replacement propeller is sized 13.25" diameter with a 17" pitch and a right-hand rotation. Built to match common Mercury models from small 40HP up to 140HP and many Force applications, it arrives as a complete kit with the thrust washer, drive sleeve, aft adaptor, tab washer and prop nut. The blade profile and heat-treated construction aim to withstand engine loads while offering straightforward swap-in compatibility for routine maintenance or gear upgrades.

Which engines and model years will this propeller fit?

The propeller is manufactured as a direct replacement for many Mercury outboards and selected Force motors. It covers Mercury 40–140 HP ranges across multiple years and specific models listed by horsepower and era for compatibility; Force replacement coverage includes several post-1995 models.

• Fits Mercury: 40/50HP (4-stroke/bigfoot) all years
• 70HP (1987–1989), 75HP (1984+), 80HP (1978–1989)
• 90HP (1978+), 100HP (1988+), 115HP (1978+, 4-stroke 2001+)
• 125HP (1994+), 140HP (1978–1981); Force: 75HP (1999+) and 90/120/150HP (1995+)

How does the propeller handle power and durability?

This propeller uses high-quality materials and heat-treated blades to resist deformation and distribute heat from high-speed operation. The three-blade design balances thrust and responsiveness for a wide range of load conditions without overstressing the hub assembly.

• Heat-treated blade edges reduce cracking and warping
• Robust hub and 15-spline interface for secure power transfer
• Three-blade geometry tuned for mixed load and planing performance
• Finished in black to resist surface corrosion under normal freshwater use

What parts are included and what do I need to install it?

The propeller ships as a ready-to-install package with all primary small components required for most replacements. Installation typically requires common marine tools and adherence to your engine manufacturer's torque and safety procedures.

• Included: propeller, forward thrust washer, drive sleeve, aft adaptor, tab washer, propeller nut
• 15-spline hub fits compatible lower unit spline shafts
• Installation: bench tool set and torque wrench recommended
• Refer to engine manual for exact torque specs and locking-tab placement

Will this propeller change my boat's performance?

Swapping to a 13.25 x 17 pitch propeller can alter acceleration, top speed, and fuel use depending on your boat’s hull, weight, and engine calibration. The 17" pitch is a compromise that favors a mix of mid-range acceleration and efficient cruising speed for many outboard-powered planing hulls.

• Expect balanced mid-range thrust for planing and cruising
• May slightly increase top speed if engine RPM remains in recommended range
• Monitor engine RPM after installation to avoid overloading
• Adjust pitch or blade count for specific towing or heavy-load needs

Who this propeller is for: Boaters who need a durable, drop-in 13.25" x 17" right-hand propeller to replace worn or damaged units on compatible Mercury and Force outboards. Ideal for owners seeking a reliable three-blade option with a complete parts kit for straightforward installation, mechanics servicing common horsepower ranges, and anglers or recreational boaters who want dependable mid-range performance without custom blade engineering.