SELVA MARINE Blue Whale 250 EFI, Service Manual

Page: 128 / 377

POWR
Power unit
5-15
6P23H11
Replacing the timing belt
CAUTION:
• Do not turn the flywheel magnet coun-
terclockwise, otherwise the water pump
impeller may be damaged.
• Do not turn the flywheel magnet or the
driven sprockets when the timing belt is
not installed. Otherwise the pistons and
valves or intake and exhaust valves will
collide with each other and be damaged.
NOTE:
To remove and install the timing belt without
replacing it, see
“ Removing the timing belt,
driven sprocket, and camshaft ” and “ Install-
ing the camshaft, driven sprocket, and timing
belt.
”
1. Reduce the fuel pressure.
NOTE:
To reduce the fuel pressure, see Chapter 4,
“ Reducing the fuel pressure. ”
2. Remove the flywheel magnet cover and
ECM cover.
3. Remove the blowby hose
1
.
4. Disconnect the ignition coil couplers
2
,
port cam position sensor couplers
3
,
starboard cam position sensor coupler
4
, and knock sensor coupler
5
.
5. Remove all ignition coils and spark plugs.
6. Remove the ECM bracket bolts
6
.
7. Remove the timing belt guides
7
.
8. Turn the flywheel magnet clockwise and
align the
“ 1TDC ” mark
a
on the flywheel
magnet with the pointer
b
.
9. Check that the “ II ” marks
c
on the port
driven sprockets are aligned, and check
that the
“ I ” marks
d
on the starboard
driven sprockets are aligned.
10. Remove the wiring harness guide
8
.
S6P25170E
4
2
6
1
3
2
5
6
7
7
S6P25100
b
c
d
a