Section 1 - Getting To Know Your Power Package; Features And Controls; Tdi 4.2L Engine Description; Identification - Mercury TDI 4.2L Manual

Section 1 - Getting to Know Your Power Package

Features and Controls

TDI 4.2L Engine Description

• Four‑stroke V8 diesel engine
• 4.2 liter displacement (252 cid)
• Common‑rail direct fuel injection
• Chain‑driven overhead‑cam hydraulic valvetrain
• Pressurized engine lubrication with replaceable oil filter
• Dry air filter
• Variable geometry turbochargers
• Twin cooling circuits, utilizing seawater cooling and closed‑circuit cooling
Refer to Engine Specifications for additional details.
Refer to Engine Components for the locations of engine components referenced in this manual.

Identification

The serial numbers are the manufacturer's keys to numerous engineering details that apply to your Mercury Marine power
package. When contacting Mercury Marine about service, always specify model and serial numbers.

Audio Warning System

Your Mercury Diesel power package may be equipped with an audio warning system. The audio warning system will not protect
the engine from damage. It is designed to warn the operator that a problem has occurred.
The audio warning system will sound with a continuous horn if one of the following occurs:
• The engine oil pressure is too low
• The coolant temperature is too hot
• Water in fuel
• Low coolant level
A continuous horn indicates a critical fault. Operating the engine during a critical fault can damage components. If the
warning horn emits a continuous beep, do not operate the engine unless avoiding a hazardous situation.
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90-8M0114081 DECEMBER 2015
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