Volvo Penta Penta Owner's Manual page 19

9. Spark Plugs Always clean area around spark
plug before removing spark plug Remove spark
plug for inspection Clean and check gap with feeler
gauge; replace if electrodes are rounded or the
spark plug has cracked ceramEc body
A
WARNING! Incorrect type of spark plugs can
cause operational dlfftculttes and damage to
the engine. Do not operate engine if spark
plug has a cracked ceramic body Damaged
spark plugs can emit external sparks which
could ignite any fuel vapors in engine
compartment.
For recommended spark plugs, plug gap and instal-
lation torque, refer to Technical Data
11. Fuel system.
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WARNING7 To prevent fire and explosion,
service procedures are always performed with
the engine stopped After completing service
procedures, check entire fuel system for pos-
sible leaks both before and after starting en-
gme Failure to inspect your work could allow
fuel leakage to go undetected This could be-
come a fire or explosion hazard
To prevent fire and explosion, Volvo Penta
fuel system components meet U S C G and
other national safety requirements Oo not
substitute with automotrve or other non-ap-
proved parts
Fuel Pumps 7.4 Gi. The engine is equipped with
two electnc fuel pumps, one low pressure pump to
bring fuel from the boat tank to the engine and a
high pressure pump to supply the fuel [njectors Both
pumps are protected by a s=ngle 20 amp c~rcu~t
breaker F. The electrical fuel pumps are activated
only when engine is running
Fuel Pumps 7.4/8.2 GL. The eng[nes are equipped
with a efectr[c fuel pump protected by a single 20
amp cCrcult breaker G. The electrical fuel pump is
actEvated only when engine is running
NOTE! A loud wh[ning norse at tdle may be due to a
restricted fuel filter causing a noisy fuel pump Oper-
ating engine with a restricted filter may damage
pressure regulator or fuel pumps See your Volvo
Penta dealer if pumps make abnormal no=se
Do not run engine out of fuel The electric fuel
pumps will be damaged
NOTE! Do not run fuel pumps out of fuel The
electnc fuel pumps will be damaged
If the engine has stopped, or will not start and you
suspect that the fuel pumps are not activated, check
the c~rcuit breaker Refer to C=rcuit Breakers and
Fuses See your Volvo Penta dealer Cf further serv-
ice ts required
10. Exhaust System. Penodlcally respect engine
exhaust system Check for deteriorated or burned
hoses, loose clamps, and ewdence of water leaks
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WARNING! Replace damaged/defective
components, and securely tighten all clamps
Exhaust leaks release funqes that can create
hazardous conditions for operator and pas-
sengers
G
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