Volvo Penta TAMD74A, Operator'S Manual

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21
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:
TAMD63L-A/ L-B (Rating 2) ..................... 2400–2500 rpm
TAMD63L-A/L-B (Rating 3) ..................... 2700–2800 rpm
TAMD63P-A (Rating 4, 5) ........................ 2700–2800 rpm
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
* Max. motor effect.
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.
Manoeuvring
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).
Pulling away
1. Move the lever from neutral to the engagement position
for the desired direction of travel. Wait for approximate-
ly two seconds.
2. Increase gradually to the desired engine speed.