Propeller Selection; Propeller Size; Selection - SELVA MARINE Kingfish 25 Service Manual

Propeller selection

The performance of a boat and outboard
motor will be critically affected by the size
and type of propeller that is used. Propellers
greatly affect boat speed, acceleration,
engine life, fuel economy, and even boating
and steering capabilities. An incorrect choice
could adversely affect performance and
could also seriously damage the engine.
Use the following information as a guide for
selecting a propeller that meets the operating
conditions of the boat and outboard motor.

Propeller size

The size of the propeller is indicated on a
propeller blade, on the propeller boss end,
and on the side of the propeller boss.
×
-
a b c
×
-
a b c
a Propeller diameter (in inches)
b Propeller pitch (in inches)
c Propeller type (propeller mark)
Mounting the rigging grommet / Installing the battery /
Rigging recommendations / Propeller selection

Selection

When the engine speed is at the full throttle
operating range, the ideal propeller for the
boat is one that provides maximum perfor-
mance in relation to boat speed and fuel con-
sumption.
Full throttle operating range:
5000–6000 r/min
Propeller size (in)
9 7/8 × 9 - F
9 7/8 × 9 - F
9 7/8 × 10 1/2 - F
9 7/8 × 11 1/4 - F
9 7/8 × 12 - F
9 7/8 × 12 - F
9 7/8 × 12 - F
High thrust model
Propeller size (in)
12 1/4 × 9 - G
×
-
Material
3
Aluminum
Material
Aluminum
3-16