1. Technical Specifications

2. Key Features

• Marine-Grade Corrosion Resistance: Built from heavy-duty anti-corrosion metals or engineered polymers with protective finishes to withstand salt spray, humidity, and marine environments.

• Vibration Damping & Secure Hold: Engineered to exact factory tolerances to absorb engine vibrations, protecting electrical terminals from stress and loose connections.

• Insulation & Protection: Holds the relay in an optimal position away from conductive or damp surfaces, reducing the risk of electrical short circuits.

• Heavy-Duty Construction: Resists thermal stress, vibration fatigue, and impact loads during continuous high-RPM running.

3. Compatible Models

Designed primarily for Yamaha 40 HP to 50 HP 2-stroke electric-start outboard motor platforms (always verify using your engine serial number or OEM part manual):

• Primary OEM Fitment:

• Yamaha 2-Stroke: 40HP / 50HP series (e.g., 40J, 40N, 50J, 50N, E40J, E50J electric start models)

• Extended Application: Select aftermarket/Chinese 40HP / 50HP 2-stroke outboard models built on the Yamaha 6F5 electrical architecture.

4. Aftermarket & Brand Compatibility

Due to the exceptional reliability and market saturation of the Yamaha 40HP–50HP 2-stroke 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 relay brackets designed to meet or exceed original OEM specifications. PREMARINE units feature high-grade corrosion protection and exact fitting geometry, serving as a reliable and cost-effective direct-replacement option for 6F5-81948-00-00.

• Chinese Clone Engines: Marine brands such as Parsun, Hidea, Seapro, and Yamabisi build 40HP–50HP 2-stroke engines directly based on the Yamaha 6F5 platform, making them fully compatible with PREMARINE and OEM 6F5-81948-00-00 parts.

• Interchangeability: Mounting hole dimensions, relay saddle dimensions, and fastening points match 6F5-81948 standards for seamless, direct replacement.

5. Common Symptoms & Troubleshooting

• Symptom 1: Starter Relay Loose or Rattling / Intermittent Starting

• Cause: Cracked socket, broken mounting tabs, or warped bracket unable to hold the relay securely.

• Solution: Inspect bracket integrity and replace with a new 6F5-81948 bracket to lock the relay back into place.

• Symptom 2: Severe Rusting / Corrosion Around Relay Mount

• Cause: Prolonged exposure to saltwater without proper freshwater flushing.

• Solution: Clean the mounting surface and install a new marine-grade replacement bracket.

• Symptom 3: Strained Wires or Loose Relay Connections

• Cause: Missing or damaged bracket allowing the relay to hang freely, stressing the wiring harness.

• Solution: Properly install the replacement bracket and secure all relay wiring.

OEM Part Numbers

Compatible OEM references include:

6F5-81948-00-00

6F5-81948-00

6F5-81948

Compatible Engine Models

This Starter Relay Bracket is primarily designed for:

2-Stroke 40HP

2-Stroke 50HP

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 Starter Relay Bracket 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