1. Technical Specifications

2. Key Features

• Marine-Grade Alloy Construction: Precision cast from premium corrosion-resistant aluminum alloy with protective marine finish to withstand harsh saltwater and high-pressure water flow environments.

• High-Precision CNC Machining: CNC-machined bearing and oil seal bores guarantee precise alignment of the drive shaft, reducing wear and vibration during operation.

• Superior Sealing Integrity: Restores lower unit seal integrity, locking gear lube inside while effectively preventing seawater, sand, and debris from contaminating the gearcase.

• Heavy-Duty Durability: Structural design is reinforced to withstand heavy shock loads and high-stress operation during continuous shifting and high-RPM running.

3. Compatible Models

Designed primarily for Yamaha 9.9 HP and 15 HP outboard motor platforms (always verify using your engine serial number or OEM part manual):

• Primary OEM Fitment:

• Yamaha 2-Stroke: 9.9HP / 15HP models (e.g., 9.9D, 15D, 9.9F, 15F series)

• Yamaha 4-Stroke: F9.9, F15 series (e.g., F9.9ELR, F15MSH, etc.)

• Extended Application: Select aftermarket/Chinese 9.9HP / 15HP outboard models built on the Yamaha 6E7 lower unit architecture.

4. Aftermarket & Brand Compatibility

Due to the exceptional reliability and market saturation of the Yamaha 9.9HP–15HP architecture, this component platform is widely supported across global marine markets:

• PREMARINE Brand Replacement: As a trusted marine parts and accessories supplier, PREMARINE offers premium aftermarket replacement bearing housings designed to meet or exceed original OEM specifications. PREMARINE units feature high-grade aluminum alloys and marine-spec corrosion protection, serving as a reliable and cost-effective direct-replacement option for 6E7-45331-00-00.

• Chinese Clone Engines: Marine brands such as Parsun, Hidea, Seapro, and Yamabisi build 9.9HP–15HP engines directly based on the Yamaha 6E7 platform, making them fully compatible with PREMARINE and OEM 6E7-45331-00-00 parts.

• Interchangeability: Physical mounting hole dimensions, housing geometry, bearing seat tolerances, and seal recess specifications match 6E7-45331 standards for seamless, direct plug-and-play replacement.

5. Common Symptoms & Troubleshooting

• Symptom 1: Water Ingress in Gear Lube (Milky Oil) or Gear Oil Leakage

• Cause: Corrosion or wear around the oil seal bore inside the housing causing loss of sealing integrity.

• Solution: Inspect housing for pitting or wear. Replace with a new bearing housing assembly along with fresh oil seals.

• Symptom 2: Drive Shaft Vibration or Excessive Noise

• Cause: Worn bearing seat inside the housing leading to play and misalignment of the drive shaft bearing.

• Solution: Check inner diameter clearances; replace the bearing housing if worn beyond factory tolerances.

• Symptom 3: Water Leakage Around Water Pump Base Plate / Lower Casing

• Cause: Warped or corroded housing mounting surface preventing proper gasket compression.

• Solution: Clean mounting surfaces thoroughly and install a new bearing housing with fresh gaskets, torquing bolts evenly to specifications.

OEM Part Numbers

Compatible OEM references include:

6E7-45331-00-00

6E7-45331-00-5B

6E7-45331-00-9M   

6E7-45331-00-CA

Compatible Engine Models

This Water Pump Bearing Housing is primarily designed for:

2-Stroke 9.9HP

2-Stroke 15HP

4-Stroke 9.9HP

4-Stroke 15HP

It is also widely used in compatible engines based on the Yamaha, including selected models from:

Parsun

Hidea

Seapro

Yamabisi

If you are unsure about compatibility, please provide your engine model number or identification plate for verification before ordering.

Applications

This Water Pump Bearing Housing is commonly used for:

Outboard engine repair

Engine rebuilding projects

Marine maintenance workshops

Boat fleet maintenance

Commercial fishing vessels

Recreational boats

Marine spare parts distribution