Power Unit; Power Unit (Check And Adjustment); Checking The Compression Pressure; Checking The Valve Clearance - SELVA MARINE Pike 9,9 Service Manual

POWR
Power unit (check and
adjustment)

Checking the compression pressure

1. Start the engine, warm it up, and then
turn it off.
2. Remove the clip from the engine shut-off
switch.
3. Disconnect the spark plug caps, remove
the spark plugs, and then install the spe-
cial service tool 1 into a spark plug hole.
1
CAUTION:
Before removing the spark plugs, remove
any dirt or dust in the spark plug wells
that may fall into the cylinders.
Compression gauge 1:
90890-03160
4. Fully open the throttle and fully push in
the choke knob.
5. Crank the engine until the reading on the
compression gauge stabilizes, and then
measure the compression pressure.
Minimum compression pressure
(reference data):
630 kPa (6.3 kgf/cm
(M model)
700 kPa (7.0 kgf/cm
(E model)
5-1

Power unit

S6AU5001
2
, 91.4 psi)
2
, 101.5 psi)
6. If the compression pressure is below
specification or the compression pres-
5
sure for each cylinder is unbalanced, add
5
a small amount of engine oil to the cylin-
der, and then measure the pressure
again.
NOTE:
• If the compression pressure increases,
check the pistons and piston rings. Replace
if worn.
• If the compression pressure does not
increase, check the valve clearances,
valves, valve seats, cylinder sleeves, cylin-
der head gasket, and cylinder head. Adjust
or replace if necessary.

Checking the valve clearance

NOTE:
Measure the valve clearances when the
engine is cold.
1. Remove the driven sprocket cover and
manual starter. (M model)
Remove the driven sprocket cover and
flywheel magnet cover. (E model)
2. Disconnect the spark plug caps and
remove the spark plugs.
3. Remove the fuel hoses 1, fuel pump 2,
blowby hose 3, and cylinder head cover
4.
3
2
4
4. Turn the flywheel magnet clockwise and
align the "1
sprocket 5 with the " " mark b on the
thermostat cover.
1
S6AU5003
" mark a on the driven
6AU3K11
5