Mercury 225 hp 4-stroke EFI 225EXLPT, 225EXXLPT, F225AET, and FL225AET Service Manual 2003 Onwards (P/N 90-888465)

• 639-page technical reference covering the 2003 and newer Mercury 225 FourStroke EFI (including 225EXLPT, 225EXXLPT, F225AET, and FL225AET variants).
• Official Mercury Marine publication (90-888465, first printing June 2002).
• Features 16 pages of torque tables, 15 exploded-view parts diagrams, and comprehensive electrical pinout references.

This manual delivers a deep dive into the mechanical and electrical systems of the V6 outboard. It goes beyond generic overviews to give you the exact data needed for your daily workshop routine. You get eight detailed sections covering the electronic fuel injection theory, powerhead assembly, mid-section housing, and lower unit gear configurations. Need to diagnose a charging issue? The stator coil resistance for the G-G circuit is clearly listed at 0.10–0.60 ohms.

Because marine environments demand precision, the Mercury 225 FourStroke EFI specifications section provides the critical data for engine tuning and full rebuilds. The 3352 cc displacement V6 block operates with a 9.9:1 compression ratio. You will find cylinder compression minimums set at 880 kPa (125 psi) and intake valve clearances of 0.20 ± 0.03 mm. When servicing the gearcase, standard rotation requires 1.15 liters of SAE 90 API GL-4 lubricant, while the counter-rotation model takes 1.00 liter. Always adhere strictly to the specified torque values and depressurize the fuel system before maintenance to prevent injury or component damage.

Whether you are checking ignition timing or overhauling the power trim, you get complete access to factory workshop documentation designed specifically for these marine power units. Plus, the instant download format means you can pull it up directly on your shop tablet or print the exact pages you need right now to get the engine back on the water.