MasterGuard Hub Installation Kit 510 – 500 Series | 4.25" & 4.75" Gearcase
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MasterGuard Hub Installation Kit 510 – 500 Series
The MasterGuard Kit 510 is a 500 Series hub installation kit designed for outboards and sterndrives with 4.25" or 4.75" gearcases. It installs Turning Point Express Mach3, Mach3 OS, Mach4, and Hustler propeller housings, and also fits as a hub upgrade for Solas Rubex, Michigan Wheel XHS, and Mercury FloTorq housings. If you're replacing a prop after a strike or upgrading your hub system, this kit is built to go back in and keep going.
Key Features
- Lifetime warranty — Covers engines under 200 hp with aluminum or stainless steel props, and engines 200+ hp with aluminum props. The only lifetime-warranted hub kit available.
- One-piece bronze and glass-filled nylon construction — Eliminates the failures common in multi-part sleeve-and-spline or pressed rubber hub designs. No cracking, no spinning, no chatter.
- Reusable after a prop strike — In most cases the hub survives impact and can be reinstalled. If it doesn't, it's covered under warranty.
- Enhanced lower unit protection — Shock-absorbing polymer cushion reduces gear shock and protects the drive on impact.
- Saves up to 33% on replacements — When replacing a damaged prop, you only need to purchase the prop housing — the hub stays.
- Corrosion-resistant marine bronze splines — Built for saltwater and freshwater use.
- Compatible with competitive housings — Warranted even when used in Mercury, Michigan Wheel, and Solas prop housings.
Kit Contents
Each kit includes a hub, thrust washer, and all hardware required for installation.
Engine Compatibility
Fits Evinrude®, Honda®, Johnson®, Mariner®, Mercury®, MerCruiser®, Nissan®, OMC®, Parsun®, Suzuki®, Tohatsu®, and Yamaha® outboards and sterndrives with 4.25" or 4.75" gearcases. Refer to the application chart for your specific engine's required kit number.
Compatible Propellers
This hub kit is required for the following propeller families (sold separately):
- Hustler 4-Blade Aluminum Propeller – 13.5" x 15"
- Express Mach3 Propeller – 13.75" x 15" Stainless Steel
- Express Mach3 – 13.25" x 19" Stainless Steel
Other 500 Series Hub Kits
Not sure if Kit 510 is right for your engine? Browse the full 500 Series lineup:
Parts Desk Insights
Best use case: Recommend Kit 510 when a customer is purchasing or replacing a Turning Point Hustler or Express Mach3/Mach4 prop for an engine with a 4.25" or 4.75" gearcase and needs the hub kit to complete the installation. It's also the right call when a customer has had a prop strike and wants to know if they need a new hub — in most cases this kit survives the strike and can be reused, which is a strong selling point. Always confirm the engine make, model, year, and gearcase size against the application chart before recommending a specific kit number, as multiple 500 Series kits cover different engine configurations.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.