17
PROPELLER REMOVAL
1.
Using a 1 7/16” wrench, hold back on the forward jam nut (1A1-78)and remove the
rear nylon insert nut (1A4-78) with a 1 1/4” wrench.
2.
Using a prop wrench (PW2-3BL) unscrew the prop. If prop wrench is not available,
use a large pipe wrench with the sides of the jaws touching the end of the propeller
blades to unscrew the prop. If the prop is stuck, as they usually are, pull very hard.
DO NOT STRIKE THE ENDS OF THE BLADES TO BREAK IT FREE. THIS NEVER
WORKS. If you cannot break the prop free, heat the front of the hub red hot. This will
only damage the seals.
If the prop is still stuck: Remove the shaft with the prop still on it. Place the shaft
(ahead of where the bushing rides) in a pipe vice. This will eliminate the spring
action in the shaft. Using the same steps as above, unscrew the prop. It may be
necessary to re-heat the hub. Remove any scars on the shaft that the vice
created with a smooth mill file.
PROPELLER INSTALLATION
1.
Inspect the forward jam nut and forward brass washer (BW-78), replace if
necessary. It may be necessary to run a die nut (7/8”-9) over the threads of the shaft
to clean them. It may also be necessary to run a tap (7/8”-9) through the propeller.
2.
Apply never-seize to the shaft. Screw the prop on the shaft clockwise (right hand
threads). When installing a used propeller use caution, the blades may be very
sharp from wear. Use leather gloves to prevent injury.
3.
Install the rear brass washer (BW-78) followed by the nylon insert nut (1A4-78). The
nylon insert nut should be tightened as tight as possible. DO NOT USE AN IMPACT
GUN!
LOWER SEAL REPLACEMENT
(Drawing for this procedure on PAGE 21)
1.
Determine if the lower bushing should also be changed by holding the cavitation
plate with one hand and moving the propeller up and down then left to right with the
other hand. If no movement is felt, there is no wear in the bushing. Once the
movement becomes 1/16” or more, it will be necessary to replace the bushing.
2.
Remove the propeller. (Refer to PAGE 17 Propeller Removal)
3.
Remove the brass washer (BW-78) and forward jam nut (1A1-78).
4.
Remove the lower housing cap (LHC-78-
which has left hand threads
). (Must turn
clockwise to remove) Clean thoroughly of any grease or Loctite.
5.
Pick old seals out with a tool such as an ice pick with a 90 degree bend on the end.
6.
Pack the first seal with grease and insert it into the housing with the spring-side
facing the engine and screw the seal on over the threads on the shaft or by using a
split plastic sleeve to slide over the threads. These seals can be pushed in with a 1”
plastic pipe. This procedure may shave a small amount of material off of the outside
diameter of the seal. Insert the next seal with the spring facing the prop. Pack the
area between the two seals with grease.