Mercury 50 Service Manual

IGNITION
Page 2A-10 90-828631R3 MARCH 1999
Flywheel Assembly
The flywheel assembly contains one permanently charged magnet which is bonded and
retained to the inner wall of the flywheel. This magnet is segmented with 3 positive and 3
negative poles. (12 pole) (6 positive pulses per revolution).
Ignition Coil
a
a-Ignition Coil and High Tension Lead Assembly
The primary (+) side of the ignition coil receives voltage discharged from a capacitor in the
ignition (CDI) unit. The voltage is multiplied by the coil until it can jump the spark plug gap.
The ignition coil will produce a high voltage current each crankshaft revolution, producing
a spark at each cylinder at the same time (Waisted Spark Ignition). Ignition coil maximum
output is approximately 40,000 volts.

Mercury 50 Specifications

General

Horsepower	50 hp
Cylinders	3
Steering	Remote
Starting	Electric
Displacement	995 cc
Fuel Induction System	EFI (Electronic Fuel Injection)
Alternator Output	18 amp
Shaft Length	20" / 508 mm
Dry Weight	112 kg
Engine Type	4-Stroke