Ignition System Description; Flywheel Removal And Installation; Removal - Mercury FourStroke 2.5 Service Manual

Ignition

Ignition System Description

A single digital capacitor discharge ignition (CDI) coil is utilized on this model. Major components of this system are the
flywheel, ignition coil, and the spark plug. A stop switch is provided which shorts the ignition coil to ground preventing spark.

Flywheel Removal and Installation

Removal

An unexpected engine start due to rotation of the flywheel may cause serious injury. During removal, installation, or
adjustment of the flywheel, always remove the spark plug leads and isolate the leads to the engine ground.
1. Disconnect the spark plug lead from the spark plug.
2. Remove the fuel tank and recoil starter. Refer to Section 8A ‑ Recoil Starter.
IMPORTANT: Use an approved container to collect and store the fuel. Wipe up any spillage immediately. Materials used to
contain spillage must be disposed of in an approved receptacle. Any fuel system service must be performed in a
well‑ventilated area.
3. Remove the flywheel cover.
4. Use the flywheel holder to secure the flywheel. Remove the flywheel nut.
b
a
Flywheel Holder
5. Attach the flywheel puller to the flywheel with three M6 x 60 bolts. Tighten the bolts to the specified torque.
6. Tighten the flywheel puller center screw until the flywheel is loose.
7. Remove the flywheel.
a
b
Page 2A-6
WARNING
!
c
c
d
a - Flywheel
b - Cover
c - Flywheel nut
49994
91‑83163M
a - Center screw
b - Flywheel puller
c - Bolts (M6 x 60) (3)
d - Flywheel holder
49995
90-8M0065421 NOVEMBER 2012