Section 3 - On The Water
Page 32
90-8M0070851
eng
AUGUST 2012
1. Examples of poor ventilation while the boat is stationary:
a -
Operating the engine when the boat
is moored in a confined space
b -
Mooring close to another boat that
has its engine operating
2. Examples of poor ventilation while the boat is moving:
a -
Operating the boat with the
trim angle of the bow too
high
b -
Operating the boat with no
forward hatches open
(station wagon effect)
Basic Boat Operation
IMPORTANT: Always check to ensure the bilge drain plug is installed before launching the boat.
Duty Cycle Rating
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.
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 applications
include pleasure craft such as sailboats, ski boats, runabouts, speedboats, and other planing hulls. Application must conform to
the Pleasure Craft/Recreational duty cycle shown (EPA Mode Number Cycle 5 Duty Cycle).
EPA Mode Number
Cycle 5
DUTY CYCLE
MODES
1
2
3
4
5
Engine speed (percent of WOT)
100
91
80
63
Idle
Engine power (percent of total)
100
75
50
25
0
Time at given mode
(percent of total operating time)
8
13
17
32
30
Chart showing full power operation is limited to a maximum of 1 of 12 hours
1 -
Mode 1: 1.0 hour (8%)
2 -
Mode 2: 1.5 hours (13%)
3 -
Mode 3: 2.0 hours (17%)
4 -
Mode 4: 4.0 hours (32%)
5 -
Mode 5: 3.5 hours (30%)
21626
a
b
a
b
43368
1
2
3
4
5
14584