Propeller Selection; Propeller Size; Selection - SELVA MARINE Blue Whale 250 EFI Service Manual

GEN
INFO

Propeller selection

The performance of a boat and outboard
motor will be critically affected by the size
and type of propeller you choose. 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 the outboard
motor.

Propeller size

The size of the propeller is indicated on the
propeller boss end, on the side of the propel-
ler boss.
b
c
-
a
a Propeller diameter (in inches)
b Propeller pitch (in inches)
c Propeller type (propeller mark)
1-39
General information
×
-
S69J1100
S6P21100

Selection

1
When the engine speed is at the full throttle
operating range (5,000–6,000 r/min), the
ideal propeller for the boat is one that pro-
vides maximum performance in relation to
boat speed and fuel consumption.
Regular rotation model
Propeller size (in)
13 3/4 × 17 - M2
13 3/4 × 19 - M2
13 3/4 × 21 - M
14 1/2 × 15 - M
14 1/2 × 19 - T
14 1/2 × 21 - T
14 1/2 × 23 - M
14 7/8 × 21 - M
15 × 17 - T
15 × 21 - T
15 1/4 × 15 - M
15 1/4 × 17 - M
15 1/4 × 19 - M
15 1/4 × 19 - T
15 1/2 × 17 - T
Counter rotation model
Propeller size (in)
13 3/4 × 17 - ML1
13 3/4 × 19 - ML1
13 3/4 × 21 - ML
14 1/2 × 19 - TL
14 1/2 × 21 - TL
14 1/2 × 23 - ML
14 7/8 × 21 - ML
15 × 17 - TL
15 × 21 - TL
15 1/4 × 15 - ML
15 1/4 × 17 - ML
15 1/4 × 19 - ML
15 1/4 × 19 - TL
15 1/2 × 17 - TL
Material
Stainless
Material
Stainless
6P23H11