SELVA MARINE Blue Whale 250 EFI Service Manual page 126

POWR
6. Remove the timing belt, driven sprock-
ets, and camshafts.
NOTE:
To remove the timing belt, driven sprockets,
and camshafts, see "Removing the timing
belt, driven sprocket, and camshaft."
7. Remove the valve shim 2 from the valve
lifter 3 using compressed air.
NOTE:
Do not mix the valve train parts. Keep them
organized in their proper groups.
8. Measure the valve shim thickness using
a micrometer, and then note the mea-
surement data.
9. Select the necessary valve shim by cal-
culating its thickness using the following
formula.
Necessary valve shim thickness =
Removed valve shim thickness +
Measured valve clearance – Specified
valve clearance
Example:
If the "Removed valve shim thickness" is 2.10
mm, the "Measured valve clearance" is 0.30
mm and the "Specified valve clearance" is
0.20 mm, then the "Necessary valve shim
thickness" = 2.10 + 0.30 – 0.20 = 2.20 mm.
10. Install the necessary valve shim into the
valve lifter.
11. Install the camshafts, driven sprockets,
and timing belt.
5-13
Power unit
NOTE:
To install the camshafts, driven sprockets,
and timing belt, see "Installing the camshaft,
driven sprocket, and timing belt."
12. Install the stator assembly.
13. Install the Woodruff key and then fly-
wheel magnet.
NOTE:
• Apply engine oil to the thread of the fly-
wheel magnet nut and washer before
installation.
• Be sure to remove any grease from the
tapered portion of the crankshaft and the
flywheel magnet.
Flywheel holder: 90890-06522
Flywheel magnet nut:
240 N·m (24.0 kgf·m, 177.0 ft·lb)
14. Check each valve clearance and adjust
again if out of specification.
Valve clearance (cold):
Intake:
0.20 ± 0.03 mm (0.008 ± 0.001 in)
Exhaust:
0.34 ± 0.03 mm (0.013 ± 0.001 in)
15. Install the cylinder head covers.
6P23H11