.
3. Remove crankcase cover (7) and wash out crankcase internally using fuel oil.
Remove oil with oil syringe inserted through the cover opening. Dry thoroughly
with paper wipes or lint-free rag.
Assembly:
4. Insert strainer pipe throUgh cover opening, down towards the forward corner of
the gear housing and with the strainer in the crankcase. Ease the pipe çarefully
into position and secure firmly.
IMPORTANT:
Ensure that the pump spigot (see Fig 54, item 6) engages with the slot in the
governor arm (Fig 54 item 5). This caD be feIt as a slight "click" or dead move-
ment when the governor controllever (8) is turned in the "stop" position.
42. CONTROLLABLE PITCH PROPELLER
The propeller blade pitch is altered by means of the drive block (4), the whole shaft
being moved in and out. The drive block thus both transmits the engine power and
controls the pitch of the propeller blades.
The thrust hearing is located in the forward end of the propeller boss and consists
of three nylon rings, two (2 and 3) to take the ahead thrust and ODe (the centre oDe,
not shown) to take the astern thrust.
Pitch Control Stiff:
A. If the pitch control is stift to operate, it
may be due to lack of grease in the 7
propeller boss, poor alignment between .
engine and propeller shaft, or to stiff- 1
ness of the drive block within the pro-
" peller boss.
I B. Check shaft alignment by inserting a 2
feeier gauge between the coupling flange
and the engine drive flange, and then try
; with the two flanges disconnected.
If pitch control then works freely and the
shaft alignment is correct, the boat must
be slipped for examination of the pro-
peller.
I C. In the case of new engines, stiffness in
propeller control may be due to incorrect
assembley of the propeller components.
0' Therefore check that the marks on the
, drive block, the propeller boss and ODe
bladeall point the same way.
D. If the stiffness continues after a period of
use, it may be due to the propeller 8
having struck some obstruction or having
". . become fouled by rope etc. Fig. 57
... 43
., "co' è,~
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