Polaflex Hub Kit for Model 400 Cobra 40-140 HP - D GROUP

Suitable for the following outboard motors:

OMC/Cobra - 4 3/4 Gearcase - 15 tooth spline

Model 800/Cobra/King Cobra 1978-90

For BRP, JOHNSON, EVINRUDE:

4 1/4" Gearcase - 15 tooth spline
90HP (4-Stroke) 2002-07
115HP (4-Stroke) 2002-07

SOLAS RBX-106 and RBX-106B, Michigan Wheel 206 and 206SH, Turning Point 503

OMC/COBRA STERNDRIVE

DETAILS M31 Hub Kit :

Cross Reference: x

The M31 Hub Kit from Polastorm is an essential component, specifically designed to improve the performance of vessels with BRP, Johnson, Evinrude, and OMC/COBRA STERNDRIVE engines. This complete set is designed to optimize the boat's functionality and ensure smoother operation under various maritime conditions. With an extensive range of essential components, the M31 Hub Kit enhances your boating experience through improved stability and responsiveness.

The main difference between an aluminum and brass hub kit is that brass is softer and therefore yields better upon impact, which protects the motor, whereas aluminum is stronger, lighter, and more durable, but less yielding. Brass is therefore more suitable for recreational purposes where the risk of contact with objects is greater, while aluminum is better for applications where durability and weight are crucial.

Brass hub kit:
- Material: Softer than aluminum.
- Advantage: Offers better protection for the motor and gears because the material can yield upon an impact or collision with an object.
- Disadvantage: Less strong and durable than aluminum.
- Application: Often used for recreational boats where the risk of contact with objects is higher.

Aluminum hub kit
- Material: Stronger, lighter, and more durable than brass.
- Advantage: Offers greater durability and lower weight.
- Disadvantage: Less compliant, increasing the risk of damage to the motor gears in the event of a collision.
- Application: Suitable for situations where durability and weight are important and the risk of impact is reduced.

This kit contains:

- Shock absorber: Minimizes vibrations and shock transmission, for a comfortable ride.
- Thrust Stopper: Prevents unwanted thrust movements and ensures optimal alignment and performance.
- Front ring: ensures a secure fit and good seal to protect crucial components.
- Spacer: Ensures the correct spacing and alignment within the structure, for better durability.
- Nut: Guarantees a firm and secure connection of all components, thereby improving overall reliability.

The M31 Hub Kit is carefully designed for seamless integration with your existing motor configuration. The robust construction and innovative design not only improve your motor's performance but also extend the lifespan of critical components by reducing wear.

Important technical information:

- Compatibility: BRP, Johnson, Evinrude, OMC/COBRA STERNDRIVER engines
- Installation: Easy to install with standard tools
- Material: High-quality, corrosion-resistant brass and rubber