Mercury V8 300 User Manual

Key Position Continuity should be indicated at the following points:
Accessories A C
Run A D
Start
A F
F D
A D
Key Switch Test (Three Position)
a - Pin A
b - Pin B
c - Pin C
d - Pin D
e - Pin E
f - Pin F
Ref. No. Pin Wire Color Description
a A Red 12 volts
b B Black Ground
c, d C, D Purple Run
e E Black/yellow Off
f F Yellow/red Start
Meter Test Leads
Key Position Reading (Ω)
Red Black
Pin B Pin E Off Continuity
Pin A Pin F
Run Continuity
Pin A Pin C, D
Pin A Pin F
Start
Continuity
Pin F Pin C, D Continuity
Pin A Pin C, D Continuity
b
c
d
e
f
a
18868
Charging and Starting System
Page 6B-14 © 2018 Mercury Marine 90-8M0146617 eng JULY 2018

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