1. Technical Specifications

2. Key Features

• Marine-Grade Durability: Sealed with high-strength epoxy resin for superior resistance to salt spray, moisture, and corrosion in harsh marine environments.

• High-Voltage Output: Efficiently steps up low voltage to high voltage to deliver an intense spark, ensuring optimal combustion and smooth idling.

• Heat & Vibration Resistance: Built with high-temperature insulated copper windings to withstand thermal stress and heavy engine vibrations during continuous high-RPM operation.

• Precise Timing Compatibility: Fully matches the OEM CDI/ECM ignition timing to eliminate misfires and improve fuel efficiency.

  
  

• 3. Compatible Models

• Primary fitment for Yamaha 4-stroke mid-range outboard motors (always verify using your engine serial number or OEM part manual):

• Primary OEM Fitment: Yamaha F30 / F40 Series (e.g., F40LA, F40FET, F30LEHA, 30–40 HP 4-stroke models)

• Extended Application: Select aftermarket/Chinese 40–50HP/60HP clone engines or specific regional variants utilizing the 6BG ignition system architecture

4. Aftermarket & Brand Compatibility

Due to the exceptional reliability and market saturation of the Yamaha F30–F60 4-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 ignition coils designed to meet or exceed original OEM specifications. PREMARINE units feature high-grade insulated copper windings and marine-spec corrosion protection, serving as a reliable and cost-effective direct-replacement option for 6BG-85570-00-00.

• Chinese Clone Engines: Marine brands such as Parsun, Hidea, Seapro, and Yamabisi build mid-range 4-stroke engines directly based on the Yamaha 6BG platform, making them fully compatible with PREMARINE and OEM 6BG-85570-00-00 parts.

• Interchangeability: Physical mounting hole dimensions, bracket geometry, wire color coding, and wiring harness connector specifications match 6BG-85570 standards for seamless, direct plug-and-play replacement.

5. Common Symptoms & Troubleshooting

• Symptom 1: Engine Misfire or Rough Idling (Running on Fewer Cylinders)

• Cause: Internal short circuit or voltage breakdown in the coil preventing spark generation.

• Solution: Measure the primary and secondary resistance using a multimeter. Replace the ignition coil if readings fall outside specified values.

• Symptom 2: Hard Starting or No Start

• Cause: Weak or no high-voltage output, resulting in no spark at the spark plug.

• Solution: Check the spark plug boot and high-tension wire connection. If connections are good but spark is absent, replace the coil.

• Symptom 3: Power Loss Under Heavy Load / High RPM

• Cause: Thermal breakdown of internal insulation, causing voltage leakage when the engine gets hot.

• Solution: Test spark output after the engine reaches operating temperature; replace the coil if misfires occur when warm.

  
  

OEM Part Numbers

Compatible OEM references include:

6BG-85570-00-00

6BG-85570-00

6BG-85570

Compatible Engine Models

This Ignition Coil Assembly primarily designed for:

4-Stroke 30HP

4-Stroke 40HP

Select 4-Stroke 50HP

Select 4-Stroke 60HP

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 Ignition Coil Assembly 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