MAX PROP WHISPER 5 BLADES Manual

MAX PROP WHISPER
INTRODUCTION
Thank you for having chosen a MAX PROP® WHISPER
automatic feathering propeller for your vessel. This
instruction booklet is designed to answer to all your
questions on assembly and use of the propeller. Please
read it carefully and verify the correct working of the
propeller before installing it on your boat.
INSTALLATION
Please, do as follows with reference to fig. 1. The
propeller is supplied already assembled for right or left
rotation, according to the information received with the
order and with the pitch required, so that it can directly
fit on the shaft. MAX PROP® WHISPER parts are NOT
interchangeable. Please, make sure , if you receive more
than one propeller, that you do not interchange parts.
a) Fit the already assembled propeller to the shaft, as if
it was a fixed propeller, and make sure that the key
has proper dimension: a good key has almost no
clearance side to side but a very small clearance on its
upper surface. This clearance is to avoid the propeller
to be pushed out of center by a key which is too tall.
b) Tighten the nut and secure it in place using the two
allen head screws.
c) Fill the prop with marine grease using the grease fitting
(supplied) inserted into the grease holes marked
"grease". The MAX PROP® WHISPER propeller works
properly only if the central body is completely filled
with the correct grease. Verify that the grease is oozing
from the rotating joints between the central part and
the hub, so that all of the moving surfaces are perfectly
oiled. The grease used must be a type of grease
approved by MAX PROP® so it will remain fluid after
years of use and will not get too stiff in cold water.
Fig. 1
d) Move the blades into the feathered position, making
sure that the rounded trailing edges of the blades are
aft as shown in fig. 2.
e) Before launching the boat, it is absolutely necessary to
operate as follows:
• Hold the propeller shaft.
• Check that the blades of the propeller rotate freely
from the forward to the reverse position just by a
light effort
• In the feathered position the blades must be
perfectly lined up and set like fig. 2
• Check that the propeller body is full of fluid marine
grease
• Make sure that the propeller is protected from
galvanic corrosion by using the usual zinc anodes on
the propeller and the shaft.
PITCH ADJUSTMENT
The pitch on a MAX PROP® WHISPER changes according to
the diameter of the propeller and the blades rotation angle
α. fig. 3 shows the pitches in millimeters corresponding to
the degree of blades angle for a given propeller diameter.
Propeller Diameter (millimeters)
300 350 400 450 500 550 600 650 700 750 800
10° 100 115 130 150 170 185 200 215 230 250 265
12° 120 140 160 180 200 220 240 260 280 300 320
14° 140 165 190 210 235 260 280 305 330 350 375
16° 160 190 215 245 270 300 325 350 380 405 430
18° 180 215 245 275 305 335 365 400 430 460 490
20° 205 240 275 310 345 375 410 445 480 515 550
22° 230 265 305 340 380 420 455 495 535 570 610
24° 250 295 335 375 420 460 505 554 585 630 670
26° 275 320 370 415 460 505 550 590 645 690 735
28° 300 350 400 450 500 550 600 650 700 750 800
30° 325 380 435 490 545 600 655 705 760 815 870
1
Fig. 2
Fig. 3