Switches; Lanyard Stop Switch - Mercury 4.2 Diesel Operation & Maintenance Manual

Section 1 - Getting to Know Your Power Package
The sound from an audio warning horn indicates that a critical fault malfunction has occurred. Operating a power package
with a critical fault can damage components. If the audio warning horn emits a sound, do not continue operations unless
avoiding a hazardous situation.
If the audio warning sounds, stop the engine immediately if you are not in a hazardous situation. Investigate the cause and
correct it, if possible. If you cannot determine the cause, consult an authorized repair facility.

Switches

Four‑Position Key Switch
Dual‑Engine Start‑Stop Switch
Bilge Blower Toggle Switch
ON
OFF
38277

Lanyard Stop Switch

A lanyard switch is designed to shut down the engine in the event the operator unexpectedly moves away from the helm, as
may happen in an accidental ejection. The lanyard is connected to the operator's personal flotation device or wrist.
Page 4
• "OFF" ‑ In the "OFF" position, all electrical circuits are off. The engine will not operate with
the key switch in the "OFF" position.
• "ACC" ‑ In the "ACC" position, any accessories connected to the electrical circuits can be
operated. The engine will not operate with the key switch in the "ACC" position.
• "ON" ‑ In the "ON" position, all electrical circuits and instrumentation receive power. The
engine can be started with an optional start‑stop switch.
• "START" ‑ Turn the key to the start position and release to start the engine.
NOTE: The key can only be removed with the key switch in the "OFF" position.
38160
A start‑stop switch is optional equipment. The start‑stop switch works in conjunction
with the key switch. There is one start‑stop switch for each engine. Each button on a
multi‑engine start‑stop switch functions independently. The key switch must be in the
run position to start a stopped engine with the start‑stop switch. Pressing a start‑stop
switch button when an engine is running will shut down the corresponding engine.
28082
Operates the bilge blower, if equipped.
NOTICE
90-8M0113988 DECEMBER 2015
eng