Propellers; Powerhead Direction Of Rotation - Suzuki DF 90 Service Manual

1-6 GENERAL INFORMATION

PROPELLERS

An outboard motor is designed to develop its rated power within
a specified engine speed range. The maximum rated power
delivered by the DF90T/115T models are shown below.
Recommended full
throttle speed range
If the standard propeller fails to meet the above requirement,
use another pitch propeller to hold the engine speed within the
range specified above.
Propeller selection chart
×
Blade Diam. (in.)
×
3 14
×
3 14
×
3 14
×
3 14
Installing a propeller with pitch either too high or too
low will cause incorrect maximum engine speed, which
may result in severe damage to the motor.
POWERHEAD DIRECTION OF ROTA-
TION
This outboard motor is designed with a L.H. (left hand) rotation
powerhead utilizing an offset crankshaft.
This design has the advantage of reducing the size of the mo-
tor and keeping the overall motor's weight closer to the boat
transom and therefore closer to the boat C/G (center of grav-
ity).
Rotation of the driveshaft is accomplished through a crankshaft
drive gear and a driveshaft driven gear.
These gears are located beneath the powerhead in the same
oil bath location as the camshaft chain.
As the rotational direction of the driven gear will be opposite of
the drive gear, a left-hand rotation powerhead design was
adopted to retain a conventional, standard rotation (right-hand)
propeller shaft output.
DF90T
4500 – 5500 r/min.
DF115T 5000 – 6000 r/min.
×
Pitch (in.)
×
17 (X1700)
×
19 (X1900)
×
21 (X2100)
×
23 (X2300)