2020 Mercury Racing 450R Outboard Repair Manual PDF

A comprehensive service manual for the Mercury Racing 450R outboard. It covers the complete outboard: specifications, maintenance, installation, storage and troubleshooting, ignition, charging and starting, electronic shift, fuel system, V8 powerhead, lubrication and cooling, Advanced Midsection (AMS), cowls, gear housings and power steering.

This manual applies to the Mercury Racing 450R, starting serial number 1E083006. It is publication 90-8M0141650, dated January 2020.

The manual covers many topics, including:

• Master specifications, maintenance, general information and outboard installation
• Storage and general troubleshooting
• Ignition, charging and starting systems, accessories
• Electronic shift
• Fuel system: induction, service procedures and emissions
• Powerhead: V8 cylinder block and crankcase, cylinder head, lubrication and cooling
• Midsection: pedestal and mount cradle, Advanced Midsection (AMS), upper and lower cowls
• Gear housings
• Power steering and AMS tie bars

The manual is divided into the following sections:

1. Important Information
2. Electrical
3. Fuel System
4. Powerhead
5. Midsection
6. Gear Housing
7. Steering

The electronic manual is a 763-page PDF, available to download right after checkout. It is fully text-searchable and has detailed clickable bookmarks for every chapter and procedure. It works on Windows, Mac, tablets and phones, and you can print only the pages you need.

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