22
LOWER SEAL REPLACEMENT
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 and unscrew the lower seal
housing cap (LHC1) (Refer to PAGE 23 Propeller
Removal)
3.
Remove the lower housing cap (LHC1
which has
left hand threads
). (It must be turned clockwise to
remove it.) Clean thoroughly of any grease or
Loctite.
4.
Pick old seals out with a tool such as an ice pick
with a 90-degree bend on the end. We prefer not to
remove the seal housing from the shaft outer
housing. (See note at the bottom of the page if the
lower seal housing is removed.)
5.
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.
(Fig. 1)
These seals can be pushed in with a 1-1/4
”
schedule 40 PVC pipe cut 6-
1/2” long. This
procedure may shave a small amount of material
off of the outside diameter of the seal.
(Fig. 2
) Insert
the next seal with the spring facing the prop. Pack
the area between the two seals with a small amount
of grease and use the same PVC pipe to push the
seal in completely.
6.
Install the new scraper seal (1SC) into the lower
housing cap (LHC-1) and install onto the lower seal
housing (LSH175-1) with blue Loctite on the
threads by turning it counter-clockwise (left-hand
threads).
(Fig. 3)
7.
Pump the grease fitting on the shaft housing until
the lubricator is about ¾ full.
8.
Apply never seize to the hex shaft and slide the
propeller on. You may need to tap it with a hammer
to seat completely.
9.
Install
a ¾” brass washer on the shaft and then
screw the jam nut tight. Screw on the nylon insert
nut and tighten.
Fig. 1
Fig. 2
Fig. 3
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