MERCURY MARINE Switch Harness 87-858679T1 Switch/harness

( Brand: Mercury Marine ), ( Part Type: Switch Harness ), ( Manufacturer Part Number: 858679T1 )

Review MERCURY MARINE New Oem Switch/harness Assembly

The Mercury Marine 858679T1 Switch/Harness is a crucial component for the electrical system of Mercury outboard motors. This switch/harness assembly is specifically designed for Mercury outboards manufactured between 1987 and 1985, making it an essential replacement part for boats with these engines.

The Mercury Marine 858679T1 Switch/Harness is a plug-and-play solution, meaning it can be easily installed without the need for extensive wiring or electrical work. The harness includes multiple switches, each designed to control specific functions of the outboard motor, such as the ignition, fuel priming, and accessory power. The switches are of high quality and are designed to provide reliable operation, even in the harshest marine environments.

The wiring in the Mercury Marine 858679T1 Switch/Harness is heavy-duty and insulated to protect against water intrusion, UV damage, and other environmental hazards. The insulation is also rated for high temperature resistance, ensuring that the harness can withstand the extreme heat generated by the outboard motor.

The Mercury Marine 858679T1 Switch/Harness is also designed with ease of installation in mind. The harness comes with clearly labeled connectors, making it easy to identify which wires go where. The connectors are also designed to be securely fastened, reducing the risk of wires coming loose or becoming damaged during operation.

Overall, the Mercury Marine 858679T1 Switch/Harness is an essential replacement part for Mercury outboard motors manufactured between 1987 and 1985. Its high-quality switches, heavy-duty wiring, and easy installation make it a reliable and cost-effective solution for maintaining the electrical system of your boat.

The Mercury Marine 858679T1 switch/harness is a component used in marine applications for managing various electrical systems on a boat. Here are some potential pros and cons associated with purchasing this part:

1. OEM (Original Equipment Manufacturer) part: This switch/harness is manufactured by Mercury Marine, ensuring compatibility with their engines and electrical systems.

2. Integrated switches: The harness includes multiple switches for various functions, reducing the need for additional separate switch purchases.

3. Durable: Mercury Marine is known for producing high-quality marine components, and this switch/harness is expected to be robust and resilient against the marine environment.

1. Cost: As an OEM part from a reputable manufacturer, the Mercury Marine 858679T1 switch/harness may be more expensive than aftermarket alternatives.

2. Limited compatibility: This switch/harness is specifically designed for Mercury Marine engines, so it may not be suitable for other brands or models.

3. Complex installation: Depending on the specific application and boat electrical system, installing this switch/harness may require advanced electrical knowledge or professional assistance.

In conclusion, the Mercury Marine 858679T1 switch/harness offers the benefits of being an OEM part with integrated switches and durability. However, it comes with a higher cost, limited compatibility, and potentially complex installation.

If you are confident in your electrical skills and have a Mercury Marine engine, this switch/harness could be a solid investment. Alternatively, if you're looking for a more budget-friendly option or have a different engine brand, you may want to consider aftermarket alternatives or consulting with a professional.

part # 858679t1 prices

• $95.49-$114.59

specifications dorycontrol:

• for makes: Mercury
• brand: Mercury Marine
• part type: Switch Harness
• manufacturer part number: 858679T1

seller dorycontrol:

• rating: 100.0%
• # reviews: 5855

offer dorycontrol:

• started: May 28, 2026
• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock

general dorycontrol:

• condition: New
• Parts Accessories > Boat Parts > Controls Steering

returns dorycontrol:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

shipping dorycontrol:

• service: USPS Ground Advantage
• type: Fixed
• cost: $7.99
• class: Standard
• transit: 4-7 Days
• carrier: USPS

payments dorycontrol:

• wallet: Apple-pay
• other
• credit card: Visa

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