Quicksilver 8M0123404 Thunderbolt Bravo III 21 Pitch 4-Blade Front Propeller

The Quicksilver Thunderbolt Bravo III front propeller represents an innovative advancement in contra-rotating propeller technology. This stainless steel 4-blade front propeller works in tandem with a smaller 3-blade rear propeller to deliver exceptional performance gains over the original Thunderbolt BIII system.

Key Specifications:

• 15.9-inch diameter with 21-inch pitch
• Left-hand rotation for front position
• Premium stainless steel construction
• 4-blade design for optimal water grip
• Designed for Mercury Bravo III outdrives

Performance Benefits:

• Up to 8% improvement in acceleration compared to original Thunderbolt BIII
• Superior holding power in rough water conditions
• Enhanced boat control through contra-rotating propeller technology
• Reduced torque steering for easier handling
• Improved fuel efficiency through optimized blade design

The contra-rotating system eliminates propeller torque and improves thrust efficiency by recovering energy lost in the rotational flow from the front propeller. This results in better acceleration, improved top-end speed, and exceptional maneuverability for sterndrive-powered boats.