Evinrude 4906B 4HP 1969 Owner's Manual page 276

CAUTION: Water must circulate through
the lower unit to the engine any time the en-
gine is run to prevent
pump in the lower unit, Just five seconds
without water will damage the water pump.
Start the engine and observe the tattle-
tale flow of water from idle relief in the
exhaust housing. The water pump installa-
tion work is verified.
connected to the lower unit, VERY LITTLE
water will be visible from the idle relief
port.
8-6 LOWER UNIT SERVICE
MANUAL SHIFT - 5 HP TO 25 HP ENGINES
Propeller Removal
Remove the propeller according to the
detailed procedures outlined in Section 8-3.
Draining Lower Unit
Drain the lower unit according to the
detailed procedures outlined in Section 8-4.
GOOD WORDS
Before the lower unit can be removed,
the type of shift disconnect must be deter-
mined. The different shift type disconnects
are lettered A thru E for simplicity.
type used on the engine being serviced may
quickly be identified
The model year and horsepower
known in order to use the Appendix.
damage to the water
If a "Flushette" is
The
from the Appendix.
must be
MANUAL SHIFT 5 HP TO 25 HP
Type A - No Shift Unit
This type is used on the direct
engines, without a reverse gear. The engine
0
is rotated 180 with the steering lever to
move the boat sternward.
rod is not used, naturally
quirement to disconnect
necessary procedure
unit is to simply remove the bolts attaching
the unit to the exhaust housing, and then
"drop" the lower unit.
Type B - Pin In Upper Driveshaft
This type is used in conjunction with the
Type A, C, and E. "Pin in the upper drive-
shaft", means that the pin holds and pushes
seal and spring assembly against the power-
head and thus provides a bottom seal for the
powerhead. After the lower unit attaching
bolts have been removed, the flywheel must
be rotated (to rotate
the pin is aligned with two slots in the upper
portion of the exhaust housing.
housing can then be separated
exhaust housing. If an attempt
force the lower unit from the exhaust hous-
ing without aligning the driveshaft
just described, the pin may be broken and
other items damaged.
Type C - Shift Disconnect Under Power head
Remove the power head. The shift rod is
attached to the shift lever underneath
power head. Disconnect the shift rod from
of
Location the locking pin in
are
parts above the pin
ing.
drive
Because a shift
there is no re-
this item.
to remove the lower
the driveshaf
t)
The lower
from the
is made to
pin, as
the
shift shaft.
contained in the exhaust hous-
8-'17
The
until
the
The