Foil Drive 3 Blade Propeller Upgrade

The Foil Drive 3 Blade Propeller Upgrade is an aftermarket propeller and hub kit designed to replace the standard two-blade setup on Foil Drive electric assist systems. Manufactured by Foil Drive, the Australian company behind the Assist series of electric foil-assist motors, this upgrade swaps the stock two-blade aluminium propeller for a three-blade aluminium propeller paired with a dedicated three-blade hub. It is compatible with the Assist PLUS (Gen 1), Assist MAX, and Assist Slim systems. The kit ships with the propeller, hub, two sets of stainless steel propeller bolts in different head profiles, hub bolts, and a hex key for installation.

• Propeller material: Aluminium
• Blade count: 3
• Compatible systems: Foil Drive Assist PLUS, Assist MAX, Assist Slim
• Not compatible with: Foil Drive Assist (original, non-PLUS)
• Included hardware: 1× aluminium propeller, 1× three-blade hub, 3× M3 30 mm standard propeller bolts, 3× M3 30 mm button-top propeller bolts, 3× M4 10 mm hub bolts, 1× 2 mm hex Allen key

The Foil Drive 3 Blade Propeller Upgrade targets riders who need more low-end torque from their electric assist unit. Foil Drive identifies three main rider profiles: heavier riders whose weight demands more thrust at takeoff, riders using low-volume prone or wing boards where the motor sits closer to the surface, and riders on smaller or higher-aspect-ratio foils that require greater force to get up on foil. The additional blade increases torque at lower RPM, which helps reduce propeller cavitation under heavy load and provides more consistent thrust when the propeller breaches the surface during chop or transitions.

This is not a beginner-focused upgrade in the sense that new Foil Drive users should dial in their setup with the stock two-blade propeller first. Once a rider identifies that they are limited by low-end power — difficulty getting on foil, cavitation at launch, or inconsistent surface starts — the three-blade kit addresses those specific issues. Foil Drive does note that the three-blade configuration draws more current than the two-blade setup, so prolonged full-throttle efoiling is not recommended as it can accelerate battery drain and trigger the system's thermal protection mode.

Within Foil Drive's accessory catalog, the 3 Blade Propeller Upgrade sits alongside the standard two-blade aluminium propeller that ships with every Assist PLUS, Assist MAX, and Assist Slim kit. It is purely an optional performance part rather than a required component. The two bolt styles included in the kit — standard hex-head and a newer button-top profile — reflect an iterative hardware update from Foil Drive; the button-top bolts offer a lower-profile shape that reduces drag around the hub.

Foil Drive's current product range consists of three main systems: the Assist MAX as the all-round flagship, the Assist Slim as a lighter performance-oriented unit, and the legacy Assist PLUS. All three accept this propeller upgrade. Riders comparing electric assist propeller options will find that most competitors in the foil-assist space use fixed proprietary propellers, making this kind of user-swappable blade upgrade relatively uncommon in the category.