STEYR MO156K25 User Manual

97
Propeller Selection
g
Your STEYR MOTORS Marine dealer has chosen a propeller designed to deliver top performance and econ-
omy under most conditions. To obtain the maximum percentage of available output (
A
), the engine RPM at
Full Throttle should be in the specified Full Load Speed Range (
B
). As to specifications, see Technical
Data and Maintenance.
If the engine’s full throttle RPM with normal load is below the specified range, use a propeller with less pitch to in-
crease the RPM. Should the engine’s full throttle RPM exceed the specified range, the engine RPM and output is
limited by the governor. Use a propeller of higher pitch to achieve a RPM reduction in the specified range (
B
).
NOTE: Engine damage can result from incorrect propeller selection if
• The engine RPM does not attain the specified “Full Load Speed Range”.
The engine thus runs in RPM range (
C
).
Therefore, use a propeller with a lower pitch.
• The engine RPM exceeds the specified “Full Load Speed Range”.
Engine speed is therefore above the admissible range (
D
).
Therefore, use a propeller with a higher pitch.
engine model
Full Load Speed Range “B”
rated rpm (range of tolerance)
4 cylinder
MO54NA33 3,300 rpm (+0 rpm/–200 rpm)
MO84K32 3,200 rpm (+0 rpm/–200 rpm)
MO94K33 3,300 rpm (+0 rpm/–200 rpm)
MO114K33 3,300 rpm (+0 rpm/–200 rpm)
MO144V38 3,800 rpm (+0 rpm/-300 rpm)
MO144M38 3,800 rpm (+0 rpm/–300 rpm)
MO164M40 4,000 rpm (+0 rpm/–300 rpm)
MO174V40 4,000 rpm (+0 rpm/–300 rpm)
6 cylinder
MO126K25 2,500 rpm (+0 rpm/–200 rpm)
MO126M28 2,800 rpm (+0 rpm/–200 rpm)
MO156K25 2,500 rpm (+0 rpm/–200 rpm)
MO166M28 2,800 rpm (+0 rpm/–200 rpm)
MO196K35 3,500 rpm (+0 rpm/–200 rpm)
MO236K42 4,200 rpm (+0 rpm/–300 rpm)
MO236K43 4,300 rpm (+0 rpm/–300 rpm)
MO256K43 4,300 rpm (+0 rpm/–300 rpm)
MO256H45 4,500 rpm (+0 rpm/–300 rpm)
MO286H43 4,300 rpm (+0 rpm/–300 rpm)
MO306H43WJ 4,300 rpm (+0 rpm/–300 rpm)
GENERAL
g
OUTPUT POWER
A
RPM
Full
Load
Speed
Range
30%
40%
50%
60%
70%
80%
90%
100%
B
C
D

STEYR MO156K25 Specifications

General

Brand	STEYR
Model	MO156K25
Category	Engine
Language	English