Mercury V8 300 User Manual

Electrical Systems
Section 6D - Advanced Midsection (AMS) Power Trim
Table of Contents
Electrical System Troubleshooting.................................... 6D-2
General Checks..........................................................6D-2
Condition/Problem...................................................... 6D-2
Problem/Solution........................................................ 6D-2
Power Trim Electrical Circuit...................................... 6D-2
Troubleshooting the Down Circuit.............................. 6D-5
Troubleshooting the Up Circuit................................... 6D-6
Troubleshooting the Down and Up Circuits (All
Circuits Inoperative)................................................ 6D-7
Trim Circuit........................................................................ 6D-7
Trim Up Circuit............................................................6D-8
Trim Down Circuit....................................................... 6D-9
Power Trim Relay Test...................................................... 6D-9
Trim Position Sensor Troubleshooting.............................6D-10
Trim Position Sensor................................................ 6D-10
Troubleshooting the Trim Position Circuit.................6D-10
Trim Position Sensor Location..................................6D-12
Testing the Trim Position Sensor with DMT 2004A..6D-12
Trim Switches and Sensor ‑ DTS.................................... 6D-13
Advanced Midsection (AMS) Power Trim
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 6D-1
6
D

Mercury V8 300 Specifications

General

Horsepower	300 HP
Displacement	4.6 L
Full Throttle RPM Range	5200-6000 RPM
Fuel Induction System	Electronic Fuel Injection (EFI)
Gear Ratio	1.75:1
Starting	Electric
Shaft Length	20 in, 25 in, 30 in
Warranty	3-Year Limited Warranty
Engine Type	V8
Fuel Type	87 Octane
Bore x Stroke	92 mm x 86 mm