Hitting rocks in the North Saskatchewan? Stick to aluminum. Running deep water for speed? Stainless is king.
Aluminum: The Sacrificial Lamb
Aluminum props are cheaper (approx. $200) and softer. If you hit a rock, the prop blades will bend or shear off, potentially saving your lower unit gears from the impact shock. This makes them ideal for:
- River boating in shallow, rocky waters
- Budget-conscious boaters
- Spares/Backup props
Stainless Steel: Performance King
Stainless steel is rigid. It doesn't flex under load, meaning you get better hole shot and top speed. However, it transfers impact shock directly to the driveline.
- Durability: Lasts essentially forever in deep water.
- Efficiency: Thinner blades slice water better.
- Cost: Expensive ($600+) and risky in shallows.
Understanding Pitch
Pitch is the distance a prop would move forward in one revolution if moving through a solid. Higher pitch = more top speed but slower acceleration. Lower pitch = better hole shot for towing but lower top speed.
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