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These instructions are only for the installation of Autostream Stainless Feathering propellers. Please
read and follow these instructions precisely, even if you think you
know how to do it! Failure to do so may result in unsatisfactory results,
additional shipping costs, loss of propeller or voiding warranty. Our
experience has shown virtually all problems stem from faulty installation.
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| Pre-installation points |  |
Before
disassembling the propeller note which are the leading & trailing
blade edges when in the “feathered” position; i.e., when blades
align fore & aft along the center line of the boat.
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Note
how freely the blades rotate.
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The
above points #1 & #2 must be the same after installing unit on shaft.
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| Tools/parts required and supplied with prop |
Hex
Key – 6mm
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Grease
- Valvoline Val Plex M grease or equivalent marine-use lubricant
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Loctite
– grade 262 “red”
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Lockwire
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Shaft/propeller
Nut
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Hex
Key -5mm A/F (for pitch adjustment)
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Box-end
Wrench -17mm A/F (or may use 11/16” for pitch adjustment)
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Spares
Kit
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extra
zinc anode, (4) “O” Rings, extra lockwire |
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Tools/parts
required but not supplied with prop
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Key
– stainless steel
Grease gun Hammer – soft face/rubber Socket Wrench ½” square Wrench 9/16" open-end (to remove zinc tail cone) |
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| Dismantling
the propeller |
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1.
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Remove
the (6) cap head screws using the 6mm hex key supplied.
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2.
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Rotate
the propeller blades to the “feathered” position and, as shown
in Figure 1,
(image to be added later) support
the blade assembly and grasp the forward portion of the propeller body
in one hand and using a soft face hammer, gently tap the leading edge
of the blades to separate the propeller blade assembly from the body.
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3.
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Follow
the steps 4, 5, & 6 only if the taper is not already machined. Otherwise
go to step 7.
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4.
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To
remove the main gear for boring and keying, loosen the locknuts on the
pitch adjusting screws sufficiently to allow backing-out of the pitch
adjusting screws. Back-out the screws about ¼”. Push the
gear through from the forward end of the body dislodging the “O”
ring. Remove the delrin thrust ring/bearing. Refer to “machining
the taper” Information which follows these instructions.
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| Reassembling the propeller |
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5.
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When
re-assembling, ensure parts are clean and greased. The gear must
rotate freely after assembly.
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6.
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Screw
pitch adjustment screws back to their original settings and lock up
the nuts.
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7.
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Make
sure the “O” ring seal on the forward end of the main gear is
greased and in place.
IMPORTANT
– follow installation steps 8 to 12 precisely.
FAILURE TO ADHERE TO ASSEMBLY PROCEDURE CAN
RESULT IN THE PROPELLER FALLING OFF. |
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8.
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Check
that the taper is matching correctly by gently sliding the main body and
gear assembly onto the shaft without the key in place. Feel for any mis-match
of the tapers. Any mis-match must be rectified before proceeding. Mark
the propeller shaft with a felt tip pen or similar at the forward end
of the propeller hub. |
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9.
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The
end of the thread section of the propeller shaft must not be less than
¾” from the gear of the hub when it is correctly positioned
on shaft taper. |
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10.
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Check
that the propeller nut screws on freely and that the thread length is
not too long to allow the nut to tighten against the propeller hub. Do
not force the nut. Any damaged threads must be rectified. Forcing a stainless
steel nut may result in the nut seizing onto the shaft, which is difficult
to rectify. |
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11.
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Remove
the propeller hub and fit the key to the shaft and refit the propeller
hub assembly to the shaft. The hub must go up to the mark on the shaft.
If not the key is fouling and will have to be machined correctly. The
most common problem is the key sitting too high out of the shaft. Check
that the key is sitting fully into the shaft keyway, then machine or file
the key to the correct height. A stainless key is recommended; most “bronze”
keys are actually common brass and can easily corrode away. |
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12.
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Ensure
the threads of the propeller shaft and nut are clean and dry. Wire brush
threads to remove any paint or old Loctite and clean with a solvent
cleaner. Refer to the instructions on the Loctite pack. Apply 3 to 5
drops of Loctite to the shaft thread and the thread in the propeller
nut as stated on the tag attached to the nut. Check that ‘O’ring
at the forward end of propeller hub is still in place and fit the hub
to the shaft. Fit the nut and tighten to the torque noted on the tag
using a ½”square drive socket wrench. |
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13.
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Check
that the propeller body still rotates freely from pitch stop to pitch
stop, i.e., forward & reverse. |
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14.
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Align
the appropriate “R” or “L” mark on the body to the
alignment mark on the forward end of the main gear. See Fig. 2 (image
to be added later) The “R” alignment is for a Right
Hand rotation propeller (clockwise when viewed from the stern looking
ahead). The “L” alignment is for a Left Hand rotation propeller.
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15.
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Prepare
the (6) cap head screws for assembly by applying a little grease to the
threads and underside of the cap heads. With the blades in the feathered
align the number 1 on the body and blade assembly and fit (6) cap head
screws and tighten lightly. |
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16.
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Check
that when all blades are in the feathered position the alignment mark
on the forward end of the propeller hub and the appropriate R or L marks
are still aligned. |
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17.
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Check
that the blades rotate freely from the forward stop to the reverse stop.
If movement is not free then the propeller must be dismantled and checked
for the reason. When all is correct, tighten the (6) cap head screws to
(15 ft. lbs.) torque and fit the lockwires. See Fig. 3 (image
to be added later) |
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18.
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Grease
the propeller with Valvoline Val Plex M or equivalent through the grease
nipple (zerk fitting) at the end of the anode until grease appears at
the blade journals or forward end of the propeller hub. |
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RECOMMENDED
TORQUE WRENCH SETTINGS |
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Imperial Threads
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Recommended
Torque |
Metric
Threads
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5/8”
dia.
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50
ft/lb
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M16
– 65 Nm
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3/4”
dia.
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75
ft/lbs
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M20
– 100 Nm
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7/8”
dia.
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100
ft/lbs
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M22
– 115 Nm
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1"
dia.
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100
ft/lbs
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M24
– 135 Nm
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This will become a link to "machining the taper" information |
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Return to main Autostream page | |||
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Return to Main Page | |||
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