MERCURY 993024 Propeller Rh Spline Mth Hub 15-1/4

( Manufacturer Part Number: 993024 ), ( Part Type: Propeller Hub ), ( Donor Motor: Loose )

Review MERCURY Stainless Propeller Rh Spline Mth Hub Warranty fits APOLLO 2015–2019

The **Mercury 993024 Apollo Propeller (15 " x 19 RH, 15 Spline, MTH Hub)** is a high-performance, precision-engineered propeller designed specifically for Mercury outboard motors, delivering unmatched efficiency, durability, and thrust for both recreational and competitive boating applications. Crafted from high-grade, corrosion-resistant materials, this propeller features a **15 -inch diameter** blade with a **19-inch pitch**, optimized to maximize speed, acceleration, and fuel economy across a wide range of operating conditions. The **right-hand rotation (RH)** design ensures seamless integration with Mercury s outboard engines, while the **15-spline shaft connection** provides a secure, vibration-dampening fit, reducing wear on the motor s internal components. The **MTH (Mercury Threaded Hub)** mounting system guarantees a tight, leak-proof seal, preventing water intrusion and ensuring reliable performance even under demanding use.

This propeller s aerodynamic **Apollo blade design** incorporates advanced hydrodynamic contours, reducing cavitation and improving efficiency at both high and low speeds. The **rhombic blade shape** enhances thrust while minimizing drag, making it ideal for applications ranging from cruising and fishing to high-performance racing and wakeboarding. Constructed from **marine-grade aluminum**, the propeller is treated with a protective coating to resist saltwater corrosion, salt spray, and UV degradation, ensuring longevity even in harsh coastal or offshore environments. The **balanced weight distribution** of the blades further reduces engine strain and vibration, contributing to smoother operation and extended motor life.

Whether installed on a mid-sized bowrider, a performance cruiser, or a high-speed wake boat, the **Mercury 993024 Apollo Propeller** delivers a compelling blend of power, responsiveness, and reliability. Its precise engineering makes it a versatile choice for anglers seeking quiet, efficient operation or thrill-seekers demanding explosive acceleration and sharp handling. For those looking to optimize their Mercury outboard s performance, this propeller stands as a premium upgrade, combining cutting-edge design with the durability expected from Mercury s legendary marine propulsion systems.

### **Pros and Cons of buying a Mercury 993024 Apollo Propeller (15-1/4" x 19 RH, 15 Spline, MTH Hub)**

1. **High Performance** The Apollo series is designed for speed and efficiency, making it ideal for high-performance outboards, particularly in planing and cruising applications. The 15-1/4" diameter balances speed and fuel economy better than smaller props for many engines.

2. **Durability** Mercury propellers are built with high-quality materials, including stainless steel blades, which resist corrosion and wear over time. The 15-spline shaft connection ensures a secure fit, reducing the risk of slippage or damage.

3. **Versatility** The right-hand (RH) orientation and MTH (Mercury Threaded Hub) design make it compatible with a wide range of Mercury outboards, particularly those in the 150 250 HP range. This reduces the need for custom modifications.

4. **Fuel Efficiency** The optimized blade design helps reduce cavitation and improves propeller efficiency, which can lead to better fuel economy compared to older or less optimized props.

5. **Warranty Support** Mercury propellers come with a manufacturer s warranty, offering peace of mind against defects in materials or workmanship.

6. **Easy Installation** The MTH hub simplifies installation, as it requires no additional adapters or custom fittings for compatible engines.

7. **Aftermarket Availability** Mercury propellers are widely available through dealers, online retailers, and marine supply stores, making replacements or upgrades straightforward.

---

1. **Cost** High-performance propellers like the Apollo series are more expensive than basic models. The price may be a barrier for budget-conscious buyers, especially if they already have a functional propeller.

2. **Potential Overkill for Smaller Engines** While this propeller works well with mid-sized Mercury outboards (150 250 HP), it may be too aggressive for smaller engines (under 150 HP), leading to excessive wear or poor performance. Conversely, it might underperform on very large engines (above 250 HP) without proper tuning.

3. **Maintenance Sensitivity** High-performance props require regular maintenance, such as blade polishing and shaft inspection, to prevent corrosion and ensure optimal performance. Neglect can lead to reduced efficiency or damage.

4. **Limited Customization** Unlike some aftermarket props that offer adjustable pitch or blade angles, the Apollo series is a fixed design. If your engine s load or conditions change significantly, you may need to replace it rather than adjust it.

5. **Potential for Cavitation Damage** If the propeller is not properly matched to the engine s load (e.g., towing heavy loads without sufficient RPM), it can experience blade pitting or erosion over time.

6. **Compatibility Concerns** While the MTH hub is standard for many Mercury engines, double-checking the exact model and shaft specifications is crucial to avoid mismatches. Incorrect installation can damage the engine or propeller.

7. **Resale Value Impact** If you later decide to upgrade or switch engines, a high-performance propeller may not be as easily transferable as a more universal model.

---

### **Conclusion and Recommendation**

The **Mercury 993024 Apollo propeller (15-1/4" x 19 RH, 15 spline, MTH hub)** is an excellent choice for owners of **Mercury outboards in the 150 250 HP range** who prioritize speed, efficiency, and durability. Its performance benefits particularly in planing and cruising make it a worthwhile investment for those who frequently operate at higher speeds or in demanding conditions.

- Smaller engines (under 150 HP) where a smaller, more efficient propeller would be better.

- Engines significantly larger than 250 HP without proper tuning.

- Boaters on a tight budget who can achieve similar results with a lower-cost alternative.

- **Buy it if:** You have a compatible Mercury outboard in the 150 250 HP range, prioritize performance, and are willing to invest in a high-quality propeller. Ensure your engine s load and RPM are properly matched to avoid premature wear.

- **Avoid it if:** Your engine is outside the recommended power range, you frequently operate at low speeds (where a smaller propeller may suffice), or you re looking for a budget-friendly option.

- **Consider alternatives if:** You need adjustable pitch or a propeller with different blade angles for varying loads.

For best results, consult a **marine mechanic or Mercury dealer** to confirm compatibility and performance expectations based on your specific engine model and intended use. Regular maintenance (e.g., blade polishing, shaft inspection) will extend the propeller s lifespan and performance.

Details:

No major bends or cracks observed. Bravo One All model's Gas Diesel, Various HP Ranges. Stainless steel construction for durability and performance. Not all model's within listed ranges will apply match before purchase.

Blades in good condition. Hub and splines in good shape. Fitment: Mercury / Mariner Seaway Outboards V6 Gear case 15 Spline.

Part Numbers: Apollo STT Series Propeller. The item you are looking at is guaranteed to be described, pictured, and cross-referenced correctly. Condition: Used. Diameter: 15-1/4.

Rotation: Right Hand RH. Spline Count: 15.: OEM-style Mercury Apollo STT stainless steel propeller. Please review photos carefully to verify condition.

Designed for high horsepower V6 gear case applications. Verify diameter, pitch, and spline count prior to purchase. Multiple Mercuries inline and V-drive applications.

part #: 993024 prices

• $150.00-$631.52

specifications ouboaen:

• for models: Apollo
• for makes: Mercury
• for years: 2015-2019
• mpn: 993024
• part type: Propeller Hub
• donor motor: Loose

returns ouboaen:

• policy: No Returns

general ouboaen:

• condition: Used
• Boat Parts > Outboard Engines Components > Other

seller ouboaen:

• city: Altamont, Illinois
• rating: 99.8%
• # reviews: 34378

shipping ouboaen:

• transit: 2-6 Days
• cost: $0.00
• type: Fixed
• class: Standard
• service: Standard

offer ouboaen:

• quantity: 1
• availability: In Stock
• options: Ship-to-home
• started: March 19, 2026
• sold: 0

payments ouboaen:

• wallet: Apple-pay
• credit card: Discover
• other

Mercury 993024 Is Similar To:

• 031026 Michigan Propeller Aluminum Prop Mercruiser Mercury Outboard (35.5% similar) Pb this prop has some minor damage as seen in the pictures. Please see included pictures. Condition: used but in good condition and guaranteed to function properly. This prop will also fit v6 Honda outboards with the correct hardware. 75 x 21P Mercuries mercury outboard propeller fits various ...(April 3rd, 2018)
• 10319 Stiletto Stainless Prop Mercury Yamaha Outboard Propeller (32.4% similar) Condition: used but in good condition and guaranteed to function properly. Part: 10319 stiletto stainless prop x 19P v6 mercury Yamaha outboard propeller fits various mariner motor parts. Please see included pictures...(August 24th, 2018)
• 10321 Stiletto Prop Mercury Mariner Yamaha Outboard Propeller (30.1% similar) May fit more engines. Condition: used but in good condition and guaranteed to function properly. Please see included pictures. Part: 10321 stiletto prop x 21P v6 mercury mariner Yamaha outboard propeller fits various motor parts. This propeller will also fit Yamaha outboard motors with the correct ...(January 7th, 2019)
• 11-805093 Mercury Marine New Oem Outboard Propeller Prop Nut (34.5% similar) New oem mercury outboard propeller prop nut this is a nos part. All parts are from freshwater lakes and have been tested whenever possible to ensure they in working order prior shipping. We answer all messages that receive promptly, usually within 24 hours...(March 11th, 2018)
• 12-81650m Mercury Mariner Thrust Hub (31.4% similar) ...(November 7th, 2018)
• 12.5 X 23p Mercury Mariner Aluminum Prop Outboard Motor Propeller (29.3% similar) Condition: used but in good condition and guaranteed to function properly. Part: mercury mariner aluminum prop 12. 5 x 23P outboard motor propeller fits various mercury mariner parts. Pb please see included pictures. This prop does not come with a hub...(June 21st, 2018)
• 125elpto Mercury Outboard Hp With Yr Warranty (40% similar) They did a very good job re-rigging and setting up the new smart gauges controls. Milford, NJ I bought a hp rebuilt Johnson from you, 1-1 2 years later this motor runs like brand new one. Everyone there had a part to play and played it perfectly like well oiled outboard. Everything is working ...(October 31st, 2018)
• 16316a46 Mercury Vengeance Stainless Prop (36.5% similar) Condition: used but in good condition and guaranteed to function properly. Part: mercury vengeance stainless prop 14 x 19P v6 Johnson eventide outboard propeller fits various mariner motor parts. Pb it can be changed to fit most all v6 engines. Please see included pictures. This prop comes with the ...(February 8th, 2018)
• 16319a4 Quicksilver Mercury Stainless Prop Mariner Outboard Motor Propeller (33.8% similar) Condition: used but in good condition and guaranteed to function properly. Pb please see included pictures. Part: 16319A4 quicksilver stainless prop v6 mercury mariner outboard motor propeller fits various parts...(January 4th, 2019)
• 16544a45 Mercury Mariner Laser Ii Prop Rh Outboard Motor Propeller No (31.2% similar) Please see included pictures. This prop has some minor damage to the tips of blades and does not include a hub kit. Pb condition: used but in good condition and guaranteed to function properly. Part: mercury mariner laser ii prop 14 x 19P rh v6 outboard motor propeller no hub fits various Mercuries ...(June 7th, 2018)
• 16988a46 Mercury Mariner Vengeance Prop Standard Outboard Motor Propeller (31.6% similar) Condition: used but in good condition and guaranteed to function properly. Pb please see included pictures. Part: mercury mariner vengeance prop 13 x 18P standard outboard motor propeller fits various parts...(May 15th, 2018)