High-Quality Ignition Coil for Mercury Mariner Outboard 8 hp, 9.9 hp, 13.5 hp, 15 hp (855685, 855685T) - 4Boats
High-Quality Ignition Coil for Mercury Mariner Outboard 8 hp, 9.9 hp, 13.5 hp, 15 hp (855685, 855685T) - 4Boats
High-Quality Ignition Coil for Mercury Mariner Outboard 8 hp, 9.9 hp, 13.5 hp, 15 hp (855685, 855685T) - 4Boats
High-Quality Ignition Coil for Mercury Mariner Outboard 8 hp, 9.9 hp, 13.5 hp, 15 hp (855685, 855685T) - 4Boats
High-Quality Ignition Coil for Mercury Mariner Outboard 8 hp, 9.9 hp, 13.5 hp, 15 hp (855685, 855685T) - 4Boats
High-Quality Ignition Coil for Mercury Mariner Outboard 8 hp, 9.9 hp, 13.5 hp, 15 hp (855685, 855685T) - 4Boats
High-Quality Ignition Coil for Mercury Mariner Outboard 8 hp, 9.9 hp, 13.5 hp, 15 hp (855685, 855685T) - 4Boats

Ignition Coil for Mercury Mariner Yamaha 9.9 15 HP 4-Stroke 66M-85570-00 855685T

855685

  • Dispatched in 2-3 days
  • 30 Day Return Policy
  • Low stock - 2 items left
  • Backordered, shipping soon
Our stock levels are dynamic and can change frequently. If a product appears to be in stock, it may have already sold out. Please contact us if you have any questions about availability. Thank you for your understanding.

Regular priceΒ£69.99
/
Tax included.

Ignition Coil 66M-85570-00

For Mercury, Mariner & Yamaha 4-Stroke Outboards

Restore peak performance and reliable starting to your outboard with this premium replacement ignition coil. Specifically engineered for the 323cc powerheads used in Mercury, Mariner, and Yamaha 4-stroke engines, this unit provides the high-voltage spark necessary for efficient combustion and smooth idling.

RELIABILITY: Manufactured with high-grade copper windings and marine-spec insulation to withstand high temperatures and vibration.

Key Features

  • βœ” Direct fit replacement for OEM 66M-85570
  • βœ” Complete assembly with HT lead
  • βœ” Corrosion-resistant mounting bracket
  • βœ” Improved cold-start reliability

Technical Specs

Voltage: 12V
Engine Type: 4-Stroke (2 Cylinder)
Material: ABS & High-Grade Copper
Terminal Type: Blade Terminal

Compatibility / Fitment Guide

Make Model Application Year/Notes
Mercury / Mariner 8HP, 9.9HP, 13.5HP, 15HP (4-Stroke) Approx. 1998–2006
Yamaha F9.9, T9.9, F15 1998–2006 (F15 98-05)
Parsun F9.9, F15 Clone Models

OEM Cross Reference

Yamaha: 66M-85570-00, 66M-85570-01, 66M-85570-02, 66M-85570-03
Mercury / Mariner: 855685, 855685T, 8251012, 825101
Sierra Marine: 18-23601

Questions & Answers

Is this a genuine original part?

This is a premium quality 4Boats aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and spark output.

How do I know if it is compatible?

Please check the part number stamped on your original coil. If it matches 66M-85570 or the Mercury 855685 reference, this part is the correct replacement.

Does it include the spark plug cap?

This unit comes as shown with the high-tension lead. You may need to transfer your existing spark plug cap or install a new one depending on your specific engine lead configuration.

Note: Professional installation is recommended. Please verify your original part number against the references above at 4boats.co.uk before purchasing.

For the products under Β£150 the shipping is Β£6.99.

Free delivery for most items over Β£150.

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.


Recently viewed

Why choose us

Untitled_1080_x_1080_px_1 - 4Boats

ITS ALL ABOUT THE QUALITY

We source the best products from the Top suppliers only. We’ve taken years of feedback and have doubled down on providing the best service.

Untitled_1080_x_1080_px_2 - 4Boats

TEAMWORK MAKES THE DREAMWORK

Our Suppliers and Partners are joining us in our commitment to challenge the way this industry operates. From product sourcing to fulfilling, they’re the best in the business.

Simple_Image_Play_Built_into_Routine_Cosmetics_TikTok_In-Feed_Ad_1080_x_1080_px_10 - 4Boats

YOU MATTER TO US.

All your orders are personally checked by a member of 4 BOATS and we make sure your orders are dispatched quickly so it arrives to your doorstep ASAP