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