# 65W-81941-00-00 89-850187 Yamaha F40 Starter Relay Mercury Starter Solenoid | Genuine Used Part

🔧 Product Description

  

Genuine Yamaha / Mercury Starter Relay Solenoid - Part Numbers: 65W-81941-00-00 / 89-850187

  

A genuine used starter relay / solenoid used on selected Yamaha F25, F30 and F40 outboards and compatible Mercury / Mariner starter-solenoid applications. Yamaha 65W-81941-00-00 cross-references with Mercury 89-850187 / 850187T1 style solenoid replacement data where the terminal layout and application match.

  

⚙️ Key Features

  

• Genuine used Yamaha / Mercury starter relay solenoid

• Correct Yamaha reference 65W-81941-00-00

• Related Mercury starter solenoid reference 89-850187 / 850187T1

• Used on selected Yamaha F25 / F30 / F40 and Mercury / Mariner 75HP-125HP applications

• Match by terminal layout, mounting style, harness connection and starter-circuit diagram

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 65W-81941-00 Yamaha starter relay assembly reference

• 65W-81941-00-00 full Yamaha starter relay assembly reference

• 65W-81941-01-00 related Yamaha starter relay reference

• 89-850187 Mercury starter solenoid reference

• 850187T1 Mercury starter solenoid reference

• 89-818997A1 related Mercury solenoid reference

• 89-818997A2 related Mercury solenoid reference

• 89-818997T1 related Mercury solenoid reference

• 89-818998A1 related Mercury solenoid reference

• 8M0185145 related later Mercury solenoid reference

  

OEM / Related Numbers:

  

• 65W-81941-00-00

• 65W819410000

• 65W-81941-00

• 65W8194100

• 65W-81941-01-00

• 65W819410100

• 89-850187

• 89-850187A1

• 850187T1

• 89-818997A1

• 89-818997A2

• 89-818997T1

• 89-818998A1

• 8M0185145

• Starter relay

• Starter solenoid

• Trim solenoid

• Relay assembly

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-5819

• Recmar: SLC2025

• Outboard Spares: OSS818

• Aftermarket replacement for 65W-81941-00 / 850187T1 / 818997T1 family

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha F25 / F30 / F40 starter relay systems

• Mercury / Mariner starter / trim solenoid systems where the terminal layout matches

  

Typically suits:

  

• Engine models:

• Yamaha F25 - approximately 1998-2009 applications using 65W-81941-00

• Yamaha F30 4-stroke - approximately 2001-2005 trim / starter solenoid applications

• Yamaha F40 4-stroke - approximately 2000-2008 trim / starter solenoid applications

• Yamaha F40 - 2000-2004 starter relay applications listed for 65W-81941-00

• Mercury / Mariner 75HP 2-stroke - serial 0C222000 to 0G360002 where compatible solenoid family is specified

• Mercury / Mariner 80HP 2-stroke - serial 0C222000 to 0G360002 where compatible solenoid family is specified

• Mercury / Mariner 90HP 2-stroke - serial 0C222000 to 0G360002 where compatible solenoid family is specified

• Mercury / Mariner 100HP 2-stroke - serial 0D252461 to 0G359967 where compatible solenoid family is specified

• Mercury / Mariner 115HP 2-stroke - serial 0D252461 to 0G359967 where compatible solenoid family is specified

• Mercury / Mariner 125HP 2-stroke - serial 0D252461 to 0G359967 where compatible solenoid family is specified

  

• HP Range: Yamaha 25HP - 40HP; Mercury / Mariner 75HP - 125HP where the solenoid diagram matches

• Engine Type: Yamaha / Mercury outboard starter relay or trim relay electrical system

• Year Range: approximately 1998 - 2009 for Yamaha 25HP-40HP; Mercury / Mariner fitment is serial-number controlled

• Serial Note: Match by exact Yamaha or Mercury serial number, solenoid terminal layout, mounting bracket, harness plug and starter / trim circuit diagram before installation.

  

🔌 Function

  

The starter relay / solenoid uses a low-current control signal to switch high-current battery power to the starter motor or relay circuit.

  

Common signs of failure:

  

• Starter does not crank

• Solenoid clicks but starter does not turn

• Intermittent cranking

• Starter remains engaged

• Burnt or corroded solenoid terminals

• Voltage reaches input but not output

• Circuit works when a known-good solenoid is fitted

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 25.0 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Electronic Components | ECU CDI & Electrical Parts

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 25.00 AUD | In stock |

## Images

- 65W-81941-00-00 89-850187 Yamaha F40 Starter Relay Mercury Starter Solenoid | Genuine Used Part
- 65W-81941-00-00 89-850187 Yamaha F40 Starter Relay Mercury Starter Solenoid | Genuine Used Part
- 65W-81941-00-00 89-850187 Yamaha F40 Starter Relay Mercury Starter Solenoid | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/65w-81941-00-00-89-850187-yamaha-f40-starter-relay-mercury-starter-solenoid-genuine-used-part)
> Updated: 2026-07-05