Ignition Specifications; Charging And Starting Specifications - Mercury 25 EFI Service Manual

Ignition Specifications

Ignition type
Spark plug
Spark plug gap
Firing order
Ignition timing at idle
Ignition timing at WOT
RPM overspeed
ECM RPM limiter (Guardian)
Over temperature
Low oil pressure (over 5 seconds)
Crankshaft position sensor
Ignition coil
Primary
Secondary
Spark plug lead (between spark plug cap and black lead)

Charging and Starting Specifications

Alternator type
Alternator charge coil resistance
Alternator output at 850 RPM
Alternator output at 5000 RPM
Starter
Type
Output
Brush length
Brush length (service limit)
Commutator undercut
Commutator diameter
Commutator diameter (service limit)
Fuse capacity
Fuse type
Battery requirements (minimum)
Above 0 °C (32 °F)
Below 0 °C (32 °F)
90-8M0105568 eng MARCH 2016
Ignition Specifications at 20 °C (68 °F)
Computer controlled CDI (capacitor discharge ignition)
Charging and Starting Specifications
465 marine cranking amps (MCA) or 350 cold cranking amps (CCA)
1000 marine cranking amps (MCA) or 775 cold cranking amps (CCA)
© 2016 Mercury Marine
NGK DCPR6E
0.8–0.9 mm (0.031–0.035 in.)
1, 3, 2
5° ± 5° BTDC
38° BTDC
6300 RPM
2800 RPM
90 °C (194 °F)
24.5 kPa (3.5 psi)
148–222 ohms
0.17–0.23 ohms
3.3–4.9 k ohms
7.1–11.1 k ohms
Three phase
0.29–0.43 ohms
5.5 A
15 A
Bendix
0.6 kW at 12 V
12.5 mm (0.49 in.)
9.5 mm (0.37 in.)
0.5–0.8 mm (0.02–0.03 in.)
30 mm (1.18 in.)
29 mm (1.14 in.)
20 A
Mini fuse
Master Specifications
Page 1A-3