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Fitment answer
Match key: Gearcase geometry, not engine year — the guard fits standard 40-65 HP lower units measuring 6.5" to 7.5" from prop shaft centre to the underside of the cavitation plate, with a propeller up to 10.5" in diameter.
Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
Confirm your engine model/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.
Confirm your engine model/year in the table below.
Confirm your engine model/year in the table below. For Suzuki owners, You can review exploded diagrams here to verify part numbers: Suzuki Parts Diagrams & Catalog.
Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson Serial Number Guide.
Mercury 40 / 50 / 60 HPYamaha F40 / F50 / F60Honda BF40 / BF50 / BF60Suzuki DF40A / DF50A / DF60AJohnson / Evinrude 40 / 50 / 60 HPOther 40-65 HP outboardsOn a phone, each row stacks into a card.
| Type | Full number | Relationship |
|---|---|---|
| JLM Marine | 21PG003 | Primary reference for this 13" blue guard |
| OEM | None | Bolt-on accessory: it adds a guard to the existing gearcase and does not replace an OEM component |
| JLM Marine | 21PG002 | Smaller 11" guard for 25-35 HP lower units |
| JLM Marine | 21PG004 | Larger 14" guard for 70-100 HP lower units |
Sizing across the range: the 11" guard for 25-35 HP outboards and the 14" guard for 70-100 HP outboards cover the neighbouring power bands, and the full propeller safety guard collection lists every size.
More than 20 years of marine-parts manufacturing experience. This high-quality aftermarket accessory is engineered to meet or exceed applicable OEM specifications. Every unit is 100% inspected before release.
Aftermarket product: Not a genuine Mercury, Yamaha, Honda, Suzuki or Johnson/Evinrude part. Brand names and part numbers identify compatible applications only.
Measure from the propeller shaft centre to the underside of the cavitation plate: the result should land between 6.5" and 7.5". Your propeller should also be no larger than 10.5" in diameter. Standard gearcases in this power band normally sit inside both figures.
Those lower units use a larger gearcase and a larger diameter propeller, so the blade tips would run too close to a 13" ring. A guard sized for an oversize gearcase is the correct route for those engines.
Any ring in the propeller stream adds some drag, so acceleration and top speed can shift slightly and handling can feel a little different. The open-lattice form keeps water flowing through the blade disc to limit that effect.
The guard is rated for use up to 25 mph. Beyond that, water load on the ring and on the gearcase mounting points climbs quickly and is outside the design envelope.
Yes. Six holes per side go through the cavitation plate and one goes through the lower skeg, using the drill bit supplied in the box. Plan the position before drilling, as the holes are permanent.
No. It is an aftermarket bolt-on accessory produced by JLM Marine under SKU 21PG003. It adds protection to your existing gearcase rather than replacing any factory component, so no OEM part number is superseded.
It is moulded from high-strength polypropylene, a marine-suitable thermoplastic that absorbs almost no water and resists salt exposure, which is why it is used for impact-loaded parts that live underwater.
Dispatch depends on the fulfilment route: Amazon FBA orders arrive within 1-5 business days, US warehouse shipments within 7 days, and China warehouse shipments in about 12 days. Rates for many items are weight-based, and this guard ships at 2.699 kg.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.