| Customization: | Available |
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| After-sales Service: | 1 Year |
| Warranty: | 1 Year |
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Outboard motor gears are critical components of the lower unit (also called the gearcase) of an outboard motor. They are responsible for transferring power from the engine to the propeller, enabling the boat to move forward or backward. Properly functioning gears are essential for smooth operation, efficiency, and durability of the outboard motor. Below is a detailed overview of outboard motor gears, including their types, functions, and maintenance tips.
Drive Shaft:
Transmits power from the engine to the gears.
Connected to the crankshaft of the engine.
Pinion Gear:
A small gear attached to the drive shaft.
Transfers power to the forward and reverse gears.
Forward Gear:
Engages when the boat is moving forward.
Connects to the propeller shaft.
Reverse Gear:
Engages when the boat is moving backward.
Connects to the propeller shaft.
Propeller Shaft:
Transfers power from the gears to the propeller.
Rotates the propeller to generate thrust.
Clutch Dog:
A sliding mechanism that engages the forward or reverse gear.
Moves based on the shift lever position.
Bearings:
Support the gears and shafts, reducing friction and wear.
Ensure smooth rotation of components.
Spur Gears:
Common in older outboard motors.
Simple design but can be noisy and less efficient.
Helical Gears:
Used in modern outboard motors.
Angled teeth provide smoother and quieter operation.
More efficient and durable than spur gears.
Bevel Gears:
Used in some outboard motors to change the direction of power transmission.
Common in high-performance or specialized motors.
Power Transmission:
Transfer power from the engine to the propeller.
Direction Control:
Enable forward, neutral, and reverse movement.
Speed Reduction:
Reduce the high RPM of the engine to a usable speed for the propeller.
Torque Multiplication:
Increase torque to the propeller for better thrust and performance.
Gear Wear:
Caused by prolonged use, lack of lubrication, or improper alignment.
Results in noisy operation and reduced performance.
Gear Damage:
Caused by impact (e.g., hitting underwater objects) or overloading.
Can lead to complete gear failure.
Water Intrusion:
Water entering the gearcase can cause corrosion and damage to gears.
Often due to worn seals or gaskets.
Improper Shifting:
Caused by a worn clutch dog or misaligned gears.
Results in difficulty engaging forward or reverse.
Regular Oil Changes:
Replace the gearcase oil annually or after every 100 hours of operation.
Use high-quality marine gear oil recommended by the manufacturer.
Inspect Seals and Gaskets:
Check for leaks or wear in the gearcase seals.
Replace damaged seals to prevent water intrusion.
Check for Metal Particles:
Inspect the gear oil for metal shavings during oil changes.
Metal particles indicate gear wear or damage.
Avoid Impact:
Be cautious when operating in shallow or rocky waters to avoid damaging the gears.
Proper Shifting:
Shift gears smoothly to avoid damaging the clutch dog or gears.
Replacing gears is a complex task that typically requires:
Disassembling the lower unit.
Removing the old gears and installing new ones.
Properly aligning and lubricating all components.
Reassembling the gearcase and testing for proper operation.
It's recommended to have this done by a professional mechanic unless you have the necessary tools and expertise.
OEM Parts: Yamaha, Mercury, Suzuki, YAMARINE, Tohatsu.
Aftermarket Brands:
YAMARINE: Offers high-quality aftermarket gears and components.
If you have specific questions about outboard motor gears or need help troubleshooting an issue, feel free to ask!
| 6E7/63V-45551-00 | YAMAHA 15HP PINION |
| 6E7-45560-00 | YAMAHA 15HP FORWARD GEAR |
| 6E7-45571-00 | YAMAHA 15HP REVERSE GEAR |
| 3B2-64020-0 | TOHATSU 8HP PINION |
| 3B2-64010-0 | TOHATSU 8HP FORWARD GEAR |
| 3B2-64030-0 | TOHATSU 8HP REVERSE GEAR |
| 350-64020-0 | TOHATSU 18HP PINION |
| 350-64010-0 | TOHATSU 18HP FORWARD GEAR |
| 350-64030-0/362-64030-0 | TOHATSU 18HP REVERSE GEAR |
| 57311-93901 | SUZUKI 15HP PINION 939 |
| 57510-93902 | SUZUKI 15HP FORWARD GEAR939 |
| 57521-93902 | SUZUKI 15HP REVERSE GEAR939 |
| 57311-96301 | SUZUKI 25HP PINION |
| 57510-96302 | SUZUKI 25HP FORWARD GEAR |
| 57521-96302 | SUZUKI 25HP REVERSE GEAR |
| 57311-94401 | SUZUKI 40HP PINION |
| 57510-94402 | SUZUKI 40HP FORWARD GEAR |
| 57521-94402 | SUZUKI 40HP REVERSE GEAR |
| 61N-45551-00 | YAMAHA 30HP PINION |
| 61N-45560-00 | YAMAHA 30HP FORWARD GEAR |
| 61N-45571-00 | YAMAHA 30HP REVERSE GEAR |
| 66T-45551-00 | YAMAHA 40HP PINION |
| 66T-45560-01 | YAMAHA 40HP FORWARD GEAR |
| 66T-45571-00 | YAMAHA 40HP REVERSE GEAR |
| 6F5-45551-00 | YAMAHA 40HP PINION |
| 6F5-45560-00 | YAMAHA 40HP FORWARD GEAR |
| 6F5-45571-00 | YAMAHA 40HP REVERSE GEAR |
| 679-45551-00 | YAMAHA 40HP PINION |
| 679-45560-01 | YAMAHA 40HP FORWARD GEAR |
| 679-45570-00 | YAMAHA 40HP REVERSE GEAR |
| 697-45551-00 | YAMAHA 48HP PINION |
| 697-45560-00 | YAMAHA 48HP FORWARD GEAR |
| 697-45571-00 | YAMAHA 48HP REVERSE GEAR |
| 688-45551-00 | YAMAHA 75HP PINION |
| 688-45560-00 | YAMAHA 75HP FORWARD GEAR |
| 688-45571-00 | YAMAHA 75HP REVERSE GEAR |
| 6E5-45551-00 | YAMAHA 115HP PINION |
| 6E5-45560-00 | YAMAHA 115HP FORWARD GEAR |
| 6E5-45571-00 | YAMAHA 115HP REVERSE GEAR |
| 6G5-45551-00 | YAMAHA 200HP PINION |
| 6G5-45560-00 | YAMAHA 200HP FORWARD GEAR |
| 6G5-45571-00 | YAMAHA 200HP REVERSE GEAR |
| 346-64020-0 | TOHATSU 25HP PINION |
| 346-64010-0 | TOHATSU 25HP FORWARD GEAR |
| 346-64030-0 | TOHATSU 25HP REVERSE GEAR |
| 57311-99J10 | SUZUKI 15HP PINION |
| 6E0-45551-00 | YAMAHA 5HP PINION |
| 6N0-G5551-00 | YAMAHA 8HP PINION |
| 57521-99J10 | SUZUKI 15HP FORWARD GEAR |
| 6N0-G5560-00 | YAMAHA 8HP FORWARD GEAR |
| 6E0-45560-00 | YAMAHA 5HP FORWARD GEAR |
| 626-45551-00 | 626 PINION |
| 626-45560-01 | 626 FORWARD GEAR |
| 650-45570-00 | 650 REVERSE GEAR |
| 647-45570-01 | YAMAHA 9HP REVERSE GEAR |
| 647-45560-00 | YAMAHA 9HP FORWARD GEAR |
| 647-45551-00 | YAMAHA 9HP PINION |
| SUZUKI 175HP PINION | |
| SUZUKI 175HP FORWARD GEAR | |
| SUZUKI 175HP REVERSE GEAR | |
| 6J8-45560-00 | YAMAHA 30HP FORWARD GEAR |
| 6H4-45560-00 | 6H4 FORWARD GEAR |
| 6H4-45551-00 | 6H4 PINION |
| 68V-45551-00 | 90-115HP PINION |
| 68V-45571-00 | 90-115HP REVERSE GEAR |
| 68V-45560-00 | 90-115HP FORWARD GEAR |
| 67F-45571-00 | 67F REVERSE GEAR |
| 6D9-45560-10 | 75-90HP FORWARD GEAR |
| 6D9-45551-10 | 75-90HP PINION |
| 6J8-45551-00 | YAMAHA 30HP PINION |
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