Mercury 15 EFI FourStroke, Service Manual

Page: 85 / 406

Flywheel Installation
1. Inspect the flywheel key. Replace if required. Place the flywheel key into the crankshaft keyway.
a - Flywheel key
2. Align the flywheel key with the flywheel slot.
3. Carefully install the flywheel.
4. While pushing down on the flywheel, rock the flywheel back and forth to ensure that the flywheel key has not fallen out of
the crankshaft keyway.
5. Install the washer and flywheel nut.
6. Hold the flywheel with the flywheel holding tool, and tighten the nut to the specified torque.
a - Torque wrench
b - Flywheel holding tool
Flywheel Holding Tool 91‑ 52344
Description Nm lb‑in. lb‑ft
Flywheel nut 78.0 – 57.5
7. Connect the spark plug leads to the spark plugs.
8. Install the air box and recoil starter assembly.
• It is easiest to install the recoil starter and air box together.
• Refer to
Section 8A
‑
Recoil Starter
and
Section 3C
‑
Air Box Installation
.
Stator
The stator is located under the flywheel. It has two sets of windings. The first winding supplies AC voltage to the ECM. The
ECM contains diodes that rectify the input voltage to keep itself powered and to supply power to the engine sensors, actuators,
ignition coils, high‑pressure fuel pump, and warning system.
The second winding generates the voltage required to maintain the battery on electric start models. This voltage is rectified
external to the ECM. Refer to
Section 2B
‑
Charging and Starting Systems
.
a
33838
a
b
62963
Ignition
Page 2A-14 © 2018 Mercury Marine 90-8M0125265 eng NOVEMBER 2017