18
7.
Install the new scraper seal (78SC) into the lower housing cap (LHC-78) and install
onto the lower seal housing (LSHS-15) by turning it counter-clockwise (left-hand
threads).
8.
Install the propeller as shown on PAGE 17.
SHAFT REMOVAL
1.
Leave the engine mounted on your boat in the trailering position or clamped to a
solid saw horse. Remove propeller, all nuts, and washers. (Refer to PAGE 17
Propeller Removal.)
2.
Remove the set screw in the yoke clamped to the prop shaft. DO NOT REMOVE
THE SET SCREW FROM THE FRONT YOKE!
3.
Remove the bolt in the split yoke with two 9/16” wrenches. Drive a flat-head
screwdriver into the split yoke as parallel to the shaft as possible. DO NOT DRIVE
IN PERPINDICULAR OR AT A RIGHT ANGLE TO THE SHAFT!
4.
Loosen the set screw on the eccentric collar on the upper bearing. Now loosen the
eccentric collar clockwise (standing from rear of engine) using a 1/8” pin punch or
center punch.
5.
Screw on propeller by hand and tap on propeller with rubber or rawhide hammer and
bump the shaft out.
SHAFT INSTALLATION
1.
Slide the shaft through the housing slowly until it comes out of the upper bearing
housing. Slip the eccentric collar over the shaft and leave it loose.
2.
Install the shaft key ¾ of the way into the yoke and slide the shaft to the yoke with a
pair of channel locks. Now tap the shaft in about ¾” with a 7/8” coupling nut or our
shaft puller. At this point, remove the lubricator and fill the tube with grease until
grease comes out at the grease fitting. Now install a 1/8” pipe plug and finish filling
the tube slowly until grease starts coming out of the lower bushing. At this time we
recommend removing the pressure lubricator and taking it apart and cleaning it
thoroughly. Use paper towels or soap and water, no solvents. Stretch the spring to
insure proper pressure.
3.
Now install the lower seal housing by applying silicone inside the lower seal housing,
in front of the threads. Tighten the lower seal housing with a pipe wrench and install
the set screw with blue Loctite. Install the lower seals as described on PAGE 17.
Install the forward jam nut (1A1-78) tightly. Now drive the shaft in until you have 1/8”
to 3/16” air gap between the forward jam nut and the LHC.
4.
Countersink the set screw hole in the split yoke with a 5/16” drill bit. Tighten the bolt
on the yoke at this time using two 9/16” wrenches extremely tight. Install the set
screw. Install the lower seal housing cap and fill the pressure lubricator until it is ¾
full. You are now ready to install the propeller.
