Foil Drive Three Blade Propeller Upgrade Kit

The Foil Drive Three Blade Propeller Upgrade Kit is an aftermarket performance part designed to replace the standard two-blade propeller hub on Foil Drive motor-assist systems. Manufactured by Foil Drive, an Australian company specializing in electric-assist foiling units, this kit adds a third aluminium propeller blade and a redesigned hub to the existing motor setup. The upgrade targets riders who need additional low-end torque from their Foil Drive system — whether due to rider weight, board volume, or foil selection — without requiring a full motor or system change.

The kit ships with one aluminium propeller blade, one three-blade hub, three M3 30mm stainless steel propeller bolts (available in standard or button-top profiles for improved hydrodynamics), four M4 10mm hub bolts, and a 2mm hex key for installation. Two bolt profile options are offered: the standard bolts match the existing two-blade hardware, while the button-top variant is shaped to reduce bubble formation around the prop during operation.

• Material: CNC-machined aluminium (propeller blade)
• Included: 1x propeller blade, 1x three-blade hub, 3x M3 30mm SS propeller bolts, 4x M4 10mm hub bolts, 1x 2mm hex key
• Compatibility: Foil Drive Assist MAX, Assist Slim, Assist PLUS
• Not compatible with: Original Foil Drive Assist
• Price: USD 190 (AUD 250)

This upgrade suits intermediate to advanced Foil Drive users who find the stock two-blade setup lacking in low-end power. Foil Drive specifically identifies three rider profiles: heavier riders who struggle to get on foil with the standard prop, riders using low-volume boards where water starts demand more initial thrust, and those running smaller or higher-aspect-ratio foils that require additional torque to initiate lift.

The three-blade configuration delivers more torque at lower RPM, which helps reduce cavitation under heavy load and produces a noticeably smoother, quieter ride compared to the two-blade setup. At least one blade stays submerged during surface transitions, eliminating the pulsing effect that can occur when both blades of a two-blade prop exit the water simultaneously. However, the added thrust comes with trade-offs: battery drain increases under sustained use, and Foil Drive advises against prolonged full-throttle efoiling with this hub, as it can trigger thermal protection in the electronics. Riders focused primarily on top-end speed or extended range may prefer to stay with the two-blade system.

Within Foil Drive's propeller catalog, this upgrade kit sits alongside the standard Two Blade Propeller Hub that ships with all Assist MAX, Slim, and PLUS units. Foil Drive also sells a Three Blade Propeller Set — a complete matched set of three aluminium blades balanced to within 0.2g — for riders building a three-blade setup from scratch rather than adding to existing hardware. Replacement individual propeller blades and bolt sets are available separately for ongoing maintenance.

Compared to simply running the stock two-blade prop, the three-blade upgrade occupies a specific niche: it trades some top-end efficiency and battery endurance for stronger low-end pull and smoother operation. Riders who already own a Foil Drive system and want to experiment with improved thrust before committing to a full motor upgrade will find this a relatively low-cost entry point at USD 190.