Mercury 40 FourStroke User Manual

2
B
CHARGING & STARTING SYSTEM
90-857046R1 NOVEMBER 2001 Page 2B-1
ELECTRICAL
Section 2B - Charging & Starting System
Table of Contents
Specifications 2B-1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Starter Motor 2B-2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery 2B-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Battery 2B-3. . . . . . . . . . . . . . . .
Operating Engine Without Battery 2B-3. . . . . .
Battery Charging System Troubleshooting 2B-3
Battery Charging System 2B-4. . . . . . . . . . . . . . . . .
Description (15 Ampere) 2B-4. . . . . . . . . . . . . .
Wiring Diagram (15 Ampere)
(S/N OG960499 and Below) 2B-4. . . . . . . . . . .
Wiring Diagram (15 Ampere)
(S/N OG960500 and Up) 2B-5. . . . . . . . . . . . . .
Alternator System Test 2B-6. . . . . . . . . . . . . . . . . . .
6 Ampere Stator 2B-6. . . . . . . . . . . . . . . . . . . . . .
15 Ampere Stator 2B-7. . . . . . . . . . . . . . . . . . . .
Stator Ohms Test 2B-8. . . . . . . . . . . . . . . . . . . . . . . .
Rectifier/Regulator (P/N 854514) Diode Test 2B-9
Analog Meter 2B-9. . . . . . . . . . . . . . . . . . . . . . . .
Digital Meter 2B-10. . . . . . . . . . . . . . . . . . . . . . . . .
Starting System Components 2B-11. . . . . . . . . . . . .
Description 2B-11. . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting the Starting Circuit 2B-11. . . . . . . .
Starter Solenoid Test 2B-12. . . . . . . . . . . . . . . . . .
Starting Circuit Troubleshooting Chart 2B-13. . .
Starter Motor 2B-15. . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 2B-15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 2B-16. . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Inspection 2B-18. . . . . . . . . . . . . . .
Testing 2B-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brush Replacement 2B-21. . . . . . . . . . . . . . . . . . .
Reassembly 2B-22. . . . . . . . . . . . . . . . . . . . . . . . .
Installation 2B-25. . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
CHARGING
SYSTEM
Readings taken @
68°F (20°C).
Alternator Type:
20 Amp. Electric Alternator Output
Stator Resistance
Quicksilver Tachometer Setting
Single Phase (12 Pole)
12.6 V-20 Amps. (252 Watts)
(Rectified/Regulated)
0.20 - 0.30 Ohms (YEL-YEL)
“6P” or “4”
STARTING
SYSTEM
Electric Start:
Starter Type
Output
Ampere Draw Under:
(Load)
(No Load)
Bendix
1.1 kW
174.0 Amps
23.7 Amps
BATTERY
Battery Rating
Minimum Requirement
For operation below 32° F (0° C)
Ampere-Hours (Ah) Minimum
For operation above 32° F (0° C)
For operation below 32° F (0° C)
465 Marine Cranking Amps (MCA)
or 350 Cold Cranking Amps (CCA)
1000 Marine Cranking Amps (MCA) or
775 Cold Cranking Amps (CCA)
70
105

Mercury 40 FourStroke Specifications

General

Brand	Mercury
Model	40 FourStroke
Category	Outboard Motor
Language	English