BF15D.BF20D
13.
CRANKCASE BREATHER
Inspection
1) Check the breather tube for deterioration, cracks, and
2)
Replace the breather tube if necessary (P. 6-16).
other damage.
14.
EXHAUST EMISSION (Bodensee model)
Before this operation perform the following maintenance.
Spark plug (P. 3-6).
Valve clearances (P. 3-8).
Idle speed (P. 3-10).
Crankcase breather (P. 3-18).
1) Remove the extension grommet.
2)
Remove the cap and gasket.
3) Route the sampling tube through the tube joint installation
hole and connect the tube end to the sampling probe.
Pinch the sampling tube using a clip to avoid leaking
exhaust gas.
4)
Start the engine and run at 3,500
-
4,000
min-' (rpm) for
about
2
minutes to warm up the engine until the engine
temperature is
55
&
5" C (131
Run the outboard motor in an outboard test tank with
the water at least 150 mm (6 in) above the antiventila-
tion plate.
5)
Connect the sampling tube to an analyzer for exhaust
emission according to the manufacturer's instructions.
6) Remove the tube pinch to free the sampling tube and
measure value of CO, HC and COz at idle.
9"
F).
[2]
SEALING
WASHER
[l]
SAMPLING
PROBECAP
\A&
/
[3]
EXTENSION
GROMMET
3-19
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