Mercury V8 250 User Manual

Sensors, Actuators, Relays, and Accessories
Section 5B - Actuators and Relays
Table of Contents
Electronic Throttle Control (ETC).......................................5B-2
Overview.....................................................................5B-2
Troubleshooting the ETC............................................5B-2
Fuel Pump Relay............................................................... 5B-4
Main Power Relay (MPR).................................................. 5B-5
Start Relay......................................................................... 5B-6
Shift Actuator..................................................................... 5B-8
Shift Actuator Harness Connector Pin Out................. 5B-8
Shift Control................................................................ 5B-9
Shift Actuator Troubleshooting................................... 5B-9
Actuators and Relays
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 5B-1
5
B

Mercury V8 250 Specifications

General

Engine Type	V8
Horsepower	250 HP
Displacement	4.6L
Fuel Induction System	Electronic Fuel Injection (EFI)
Steering	Hydraulic Steering
Gear Ratio	1.75:1
Cylinders	8
Starting	Electric Start
Full Throttle RPM Range	5200-6000 RPM
Alternator Amp	85 amp
Shaft Length	25 in
Weight	527 lbs
Fuel Type	Unleaded 87 octane minimum