# 8717009A5 Mercury MerCruiser Key and Barrel | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Ignition Key Switch Assembly - Part Number: 87-17009A5

  

A genuine Quicksilver ignition key switch assembly for selected Mercury / Mariner and MerCruiser remote control boxes. This 3-position magneto-style key switch provides Off, Run and Start positions and includes push-to-choke functionality where the control system supports it.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM ignition key switch assembly

• Correct Mercury part number 87-17009A5

• 3-position Off / Run / Start key switch

• Magneto-style ignition switch with push-to-choke function

• Used on selected Commander 2000 and 4000 side-mount control systems

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 87-17009A5 current OEM ignition switch assembly reference

  

OEM / Related Numbers:

  

• 87-17009A5

• 17009A5

• 8717009A5

• Mercury Gen 1 Side Mount Control Key Switch

• Commander 2000 related control application

• Commander 4000 related control application

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / Mariner / MerCruiser remote control box ignition switch applications

  

Typically suits:

  

• Control models:

• Mercury Commander 2000 16900-series remote control boxes

• Mercury Commander 4000 side-mount remote control boxes without power trim

• Quicksilver Commander 2000 side-mount control applications using 87-17009A5

• Quicksilver Commander 4000 side-mount control applications using 87-17009A5

• Mercury / Mariner outboard control boxes requiring 6-wire 3-position magneto ignition switch

• MerCruiser remote control boxes using ignition key switch 87-17009A5

  

• System Type: Remote control ignition key switch / key barrel

• Switch Type: Off / Run / Start, magneto-style with push-to-choke

  

🔌 Function

  

The key switch controls ignition and starter activation from the remote control box and can operate the choke/enrichment circuit where fitted.

  

Common signs of failure:

  

• Engine will not crank from key

• Intermittent ignition power

• Key sticks or does not return from Start

• Push-to-choke function fails

• Corroded or loose switch terminals

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 183.7 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 183.70 AUD | In stock |

## Images

- 8717009A5 Mercury MerCruiser Key and Barrel | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](www.sawleysautoandmarine.com.au/products/8717009a5-mercury-mercruiser-key-and-barrel-genuine-quicksilver-oem-part)
> Updated: 2026-05-17