Cruising Speed; Maneuvering - Volvo Penta TAMD74A-A Operator's Manual

Engines with electrical system cu2500f

Table of Contents

Operation

Cruising speed

Avoid running at full speed to obtain the best operating

economy. We recommend a cruising speed of at least

200 rpm lower than the maximum rpm at full speed (wide

open throttle). The maximum rpm at full speed can vary

depending on choice of propeller, load and sea conditions,

etc., but should be within the wide open throttle range.

Wide open throttle range:

TAMD74A-A (Rating 1, 154 kW*) ............ 1700–1800 rpm

TAMD74A-A (Rating 1, 160 kW*) ............ 1900–2000 rpm

TAMD74A-A (Rating 1, 184 kW*) ............ 2000–2100 rpm

TAMD74A-A (Rating 2) ............................ 2100–2200 rpm

TAMD74A-B (Rating 2) ............................ 2100–2200 rpm

* Full power.

There could be several reasons for the engine failing to

reach the wide open throttle range, see the chapter "Trou-

bleshooting". Use a propeller with a greater pitch if the en-

gine speed exceeds the wide open throttle range. Get in

touch with your Volvo Penta dealer for advice.

The chapter contains functional descriptions of the controls

available from Volvo Penta.

The reverse gear must be engaged at low idling speed.

There must be a brief pause after engaging reverse gear

before increasing the engine speed. The pause must be

approximately two seconds long to ensure the reverse

gear clutch plates are properly engaged.

IMPORTANT! If the boat is equipped with two en-

gines, they must both be running while in reverse or

there will be a risk of water entering the stationary en-

gine (through the exhaust passage).

Table of Contents

Table of Contents

Tamd74a-b