Poor Ventilation; Duty Cycle; Basic Boat Operation; Duty Cycle Rating - Mercury TDI 4.2L Manual

Section 2 - On The Water

Poor Ventilation

Under certain running or wind conditions, permanently enclosed or canvas enclosed cabins or cockpits with insufficient
ventilation may draw in carbon monoxide. Install one or more carbon monoxide detectors in your boat.
Although the occurrence is rare, on a very calm day, swimmers and passengers in an open area of a stationary boat that
contains or is near a running engine may be exposed to a hazardous level of carbon monoxide.
1. Examples of poor ventilation while the boat is stationary:
a
2. Examples of poor ventilation while the boat is moving:
a

Duty Cycle

Basic Boat Operation

IMPORTANT: Damage caused by improper application or failure to operate the power package within the specified operating
parameters will not be covered by the Mercury Diesel Limited Warranty.

Duty Cycle Rating

It is the responsibility of the boat manufacturer or the installing dealer to ensure that the power package is properly applied. In
all cases, the power package must be equipped with the gear ratio that allows the engine to operate at wide‑open throttle
(WOT) at the rated engine RPM. The power package must also be applied in accordance with recommendations indicated in
the appropriate applications manual. Use of Mercury Diesel engines in other than the applications indicated by the following
information and in the appropriate applications manual requires written approval from an authorized Mercury Diesel application
engineer.

Pleasure Duty Rating

The pleasure duty rating applies to recreational planing craft used exclusively for pleasure and recreation. Typical pleasure
craft include sailboats, ski boats, runabouts, speedboats, and other planing hulls. Application must conform to the Pleasure
Craft/Recreational duty cycle shown in the following table.
Page 18
b
21626
b
a - Operating the engine when the boat
is moored in a confined space
b - Mooring close to another boat that
has its engine operating
a - Operating the boat with the
trim angle of the bow too
high
b - Operating the boat with no
forward hatches open
43368 (station wagon effect)
90-8M0114081 DECEMBER 2015
eng