Stainless Steel Propellers for 60–90 HP Tohatsu Outboard Boat Motor
Choosing the right propeller transforms your Tohatsu-powered boat from a handful to a joyride. Designed for 60–90 HP engines with a 4-1/4″ gearcase and 15-spline shaft, our stainless steel propellers deliver crisp acceleration, reliable handling, and long-term resistance to corrosion. Although these props fit Yamaha and Mercury models, we’re not affiliated with those manufacturers—we simply offer a high-strength alternative engineered to match or exceed OEM performance.
The Stainless Steel Advantage
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Precision Thrill
Every leading edge stays razor-sharp, so your throttle input turns into instant bite against the water. No mushy starts, no drift in steering. -
Rock-Solid Durability
Marine-grade alloy fights off pitting, sand abrasion, and salt spray. That means fewer replacements and more time enjoying the wake. -
Fuel-Savvy Design
By fine-tuning diameter and pitch, you’ll often see measurable gains in fuel efficiency—especially on long cruises when every drop counts.
Understanding Blade Count, Diameter & Pitch
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Blade Count (B)
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3-Blade setups strike a balance between top speed and smooth acceleration.
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4-Blade variants boost low-end torque and deliver extra grip under heavy loads or during wakeboarding.
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Diameter (D)
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Ranges from 13″ up to 14″.
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Smaller diameters spin faster; larger diameters push more water per revolution.
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Pitch (P)
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Measures from 13″ to 21″.
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Lower pitches help heavy or fully loaded boats plane quickly, while higher pitches improve top-end speed and cruising economy.
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Rotation (R)
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Right-hand (R) and left-hand (L) options keep steering predictable—match the rotation to your engine’s counter-rotation setup.
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OEM Number
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A dash (–) indicates a universal fit.
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Specific codes (e.g., 6431-130-19) correspond to direct Tohatsu replacement parts.
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Complete Propeller Specifications
| OEM Number | Blades | Diameter (D) | Pitch (P) | Rotation |
|---|---|---|---|---|
| – | 3 | 13″ | 17″ | L |
| 6441-133-17 | 3 | 13″ | 17″ | R |
| 6431-130-19 | 3 | 13″ | 19″ | R |
| 6431-138-13 | 3 | 13¼″ | 13″ | R |
| 6432-133-17 | 3 | 13¼″ | 17″ | L |
| 6431-135-15 | 3 | 13½″ | 15″ | R |
| 6441-138-15 | 3 | 13¾″ | 15″ | R |
| – | 3 | 13⅞″ | 14″ | R |
| – | 3 | 13⅞″ | 14″ | L |
| – | 3 | 13⅞″ | 19″ | R |
| – | 3 | 13⅞″ | 19″ | L |
| – | 3 | 14″ | 21″ | R |
| – | 3 | 14″ | 21″ | L |
| 6453-130-17 | 4 | 13″ | 17″ | R |
| – | 4 | 13″ | 17″ | L |
| 6453-130-19 | 4 | 13″ | 19″ | R |
| – | 4 | 13″ | 19″ | L |
Picking Your Perfect Propeller
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Casual Cruising
A 3-blade, 13″/17″ prop (3 blades; 13″ diameter; 17″ pitch) delivers smooth acceleration and stable high-speed handling for day-to-day outings. -
Loaded or Towed Runs
Try a 4-blade, 13″/19″ propeller (4 blades; 13″ diameter; 19″ pitch) for sharper turns, reduced slippage, and confident throttle response when you’re carrying heavy gear or pulling a tube. -
Precision Tuning
If you spot your exact OEM code, rest assured that fit and balance align with Tohatsu’s original standards—no guesswork required.
First-Hand Insights
A charter captain friend once told me he swapped from a generic aluminum prop to a stainless steel, noticing a full knot of extra top speed and firmer control in chop. Another avid angler shaved nearly two minutes off their plane time by dropping to a 13¼″/13″ combo. These tweaks may seem small on paper, but on the water, they translate to earlier drifts on fish, longer runs on a tank, and more smiles per hour.
Choosing the right stainless steel propeller involves more than picking a number; it’s about understanding your boat’s weight, hull shape, and intended use. With this guide in hand, you’re equipped to match blade count, diameter, pitch, and rotation to your exact needs. Ready for a prop that never quits? Reach out to our experts and experience the difference in durability, efficiency, and pure boating pleasure.