Mercury/Mariner Outboards Service Manual – 3 Litre SEAPRO / MARATHON 225 Carb, 225 EFI, 250 EFI – P/N 90-822900

This official Mercury/Mariner Service Manual (P/N 90-822900) provides detailed service, maintenance, and repair procedures for 3 Litre SEAPRO and MARATHON outboards, including:

• 225 Carburetor

• 225 EFI

• 250 EFI

Applicable Models & Serial Range:

• For U.S. serial numbers 0D280813 and up

• Year: 1994, published by Brunswick Corporation

• Covers both Mercury and Mariner branded engines

Contents Include:

• Engine Specifications

• Fuel System (Carburetor & EFI)

• Electrical System

• Powerhead

• Midsection & Lower Unit

• Troubleshooting Charts

• Wiring Diagrams

• Maintenance Intervals & Torque Specs

Whether you're a technician or a DIY enthusiast, this manual is an essential resource for accurate servicing and proper engine care of Mercury/Mariner 3L performance outboards.