1. Boat Outboard Engines To Buy
  2. sku: 20886711955134793
  3. MERCURY 8M0120839

MERCURY 8M0120839 Hour Kit 25HP 30HP

fits model: Marine, 300. make: Mercury.

8m0120839 Mercury Marine 300 Hour Maintenance Kit 25hp And 30hp 4 Stroke Oem Pn

( Manufacturer Part Number: 8M0120839 ), ( Country Of Origin: United States )

Review MERCURY Hour Maintenance Kit 25hp And 30hp Stroke Oem Pn fits MARINE 300

Mercury 8M0120839 Marine 300-Hour Service Kit (Suitable for 25HP and 30HP Outboards)

The Mercury 8M0120839 Marine 300-Hour Service Kit is designed to ensure optimal performance and longevity for your Mercury 25HP and 30HP outboard engines. This comprehensive kit is meticulously engineered to cater to the maintenance needs of these powerhouse engines, offering a wide array of high-quality components to maintain their peak efficiency.

The kit includes an extensive range of essential parts, such as:

1. A high-performance spark plug, designed to deliver efficient combustion and prolong engine life.

2. A premium quality oil filter, engineered to capture contaminants and extend engine performance.

3. A fuel filter, designed to remove water and debris from the fuel system, preventing damage and ensuring smooth operation.

4. A set of engine-specific gaskets, ensuring a tight and reliable seal to prevent leaks and maintain engine efficiency.

5. A water pump seal, crucial for maintaining the correct water flow and cooling within the engine.

6. A set of o-rings, used throughout the engine to ensure a reliable seal and prevent leaks.

7. A sacrificial anode, designed to protect the engine from corrosion, extending its life and performance.

By following the 300-hour service schedule with this kit, you can confidently maintain your Mercury 25HP or 30HP outboard engine, keeping it running smoothly and efficiently. This service kit is a must-have for boat owners, ensuring their engines remain in top condition for countless adventures on the water.

With the Mercury 8M0120839 Marine 300-Hour Service Kit, you're not just maintaining your engine you're investing in its longevity and performance. Don't compromise on the quality of your marine engine maintenance. Choose the Mercury 8M0120839 Marine 300-Hour Service Kit for your Mercury 25HP or 30HP outboard engine today.

Pros and Cons of buying a Mercury 8M0120839 Marine 300-hour Kit (25hp-30hp)

Pros:

1. Extensive Coverage: The 300-hour service kit offers comprehensive coverage for routine maintenance, ensuring the engine runs smoothly and efficiently.

2. Original Equipment: Being an original equipment manufacturer (OEM) kit, it guarantees a perfect fit and compatibility with the engine, preventing potential issues caused by aftermarket parts.

3. Cost-efficient: By performing maintenance on your own using this kit, you can save on labor costs at a marine service center.

4. Peace of Mind: Regular maintenance and timely replacement of components can help extend the lifespan of your engine and reduce the risk of unexpected breakdowns.

Cons:

1. Skill Level: Performing the maintenance yourself requires a certain level of mechanical skill and knowledge. If you're not confident in your abilities, it may be better to let a professional handle it.

2. Upfront Cost: While the kit may save money in the long run, the initial cost can be significant, especially for those on a tight budget.

3. Time-consuming: Maintenance can be time-consuming, and if you're not used to working on engines, it may take longer than expected.

4. Limited Flexibility: Some may prefer the convenience of having a service center handle their maintenance, as it allows for more flexibility in scheduling and the ability to address any unexpected issues that may arise.

Conclusion:

The Mercury 8M0120839 Marine 300-hour Kit (25hp-30hp) offers numerous benefits, including comprehensive coverage, cost-efficiency, and peace of mind. However, it requires a certain level of mechanical skill, may not be suitable for those on a tight budget, and can be time-consuming. If you have the necessary skills and are comfortable performing the maintenance, this kit can be a cost-effective solution. If not, consider having a professional service center handle the maintenance for you.

Details:

Periodic maintenance and service helps protect your investment in engine boating pleasure. Our legendary reliability and durability let you boldly embrace your next adventure large or small knowing you re backed by the best quality design, engineering, materials.: Part # 8M0120839. The box includes oil filter, fuel drain seal, gear case seals, thermostat and gaskets, three spark plugs, water pump impeller kit anode. Mercury Marines passion for performance is matched by your drive the new, unknown.

part #: 8m0120839 prices

  • $200.00-$291.89

specifications ouboaen:

  • for models: Marine, 300
  • for makes: Mercury
  • mpn: 8m0120839
  • country of origin: United States

general ouboaen:

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

shipping ouboaen:

  • carrier: USPS
  • service: USPS Ground Advantage
  • type: Calculated
  • transit: 20-23 Days
  • cost: $0.00
  • class: Standard

returns ouboaen:

  • paid by: Seller
  • policy: Returns Accepted
  • time: 30 Days

seller ouboaen:

  • city: Berea, Kentucky
  • rating: 100.0%
  • # reviews: 2

payments ouboaen:

  • credit card: Visa
  • wallet: Paypal
  • other

offer ouboaen:

  • quantity: 2
  • options: Ship-to-home
  • sold: 0
  • availability: In Stock
  • started: December 26, 2025
for models: marine, 300, for makes: mercury, country of origin: united states,
category: boat parts > outboard engines components, sku: 20886711955134793,
Mercury 8M0120839 Is Similar To:
ouboaen logo
5 offers $200.00–$291.89 USD
  • New. Offer #1 priced at $291.89 + $0.00 shipping estimate = $291.89* total. Service Notes Part Number: .FREE SHIPPING
  • New. Offer #2 priced at $277.99 + $12.00 shipping estimate = $289.99* total. The box includes oil filter, fuel filter, oil drain seal, gear case seals, thermostat and thermostat gaskets, three spark plugs, water pump impeller kit and anode Part # .+$12.00 shipping
  • New. Offer #3 priced at $200.00 + $39.07 shipping estimate = $239.07* total. +$39.07 shipping
  • New. Offer #4 priced at $277.99 + $0.00 shipping estimate = $277.99* total. The box includes oil filter, fuel filter, oil drain seal, gear case seals, thermostat and thermostat gaskets, 3 spark plugs, water pump impeller kit and anode.FREE SHIPPING
  • New. Offer #5 priced at $311.92 + $9.54 shipping estimate = $321.46* total. 300 HR SERVICE KIT.+$9.54 shipping

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