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Mercury V8 300 User Manual

Mercury V8 300
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Electrical Systems
Section 6B - Charging and Starting System
Table of Contents
Charging and Starting Specifications.................................6B-2
Battery Specifications........................................................ 6B-2
Battery................................................................................6B-2
Battery Cable Test...................................................... 6B-2
Replacement Parts..................................................... 6B-3
Battery Precautions.................................................... 6B-3
Charging a Discharged Battery...................................6B-3
Fuses................................................................................. 6B-4
Charging System............................................................... 6B-5
Charging System Components...................................6B-5
Alternator Description................................................. 6B-5
Alternator.................................................................... 6B-6
Charging System Inspection.......................................6B-6
Charging System Circuitry Tests................................ 6B-7
Starting System................................................................6B-10
Starting System Components and Connections ‑ DTS
.............................................................................. 6B-10
Starting System Components and Connections ‑
Mechanical............................................................ 6B-11
Starting System Electrical Checks............................6B-12
Key Switch Test (Four Position)............................... 6B-13
Key Switch Test (Three Position)............................. 6B-14
Charging and Starting System
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 6B-1
6
B

Table of Contents

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Mercury V8 300 Specifications

General IconGeneral
Horsepower300 HP
Displacement4.6 L
Full Throttle RPM Range5200-6000 RPM
Fuel Induction SystemElectronic Fuel Injection (EFI)
Gear Ratio1.75:1
StartingElectric
Shaft Length20 in, 25 in, 30 in
Warranty3-Year Limited Warranty
Engine TypeV8
Fuel Type87 Octane
Bore x Stroke92 mm x 86 mm

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