Maintenance
The spark plug is an important engine compo- When fitting the plug, always clean the gasket
nent and is easy to inspect. The condition of surface and use a new gasket. Wipe off any
the spark plug can indicate something about dirt from the threads and screw in the spark
the condition of the engine. For example, if the plug to the correct torque.
center electrode porcelain is very white, this
Spark plug torque:
could indicate an intake air leak or carburetion
25.0
Nm (18.4 ft-lb) (2.55 kgf-m)
problem in that cylinder. Do not attempt to di-
agnose any problems yourself. Instead, take
the outboard motor to a Yamaha dealer. You
should periodically remove and inspect the
spark plug because heat and deposits will
cause the spark plug to slowly break down
and erode. If electrode erosion becomes ex-
cessive, or if carbon and other deposits are
excessive, you should replace the spark plug
with another of the correct type.
NOTE:
If a torque-wrench is not available when you
are fitting a spark plug, a good estimate of the
correct torque is 1/4 to 1/2 a turn past finger-
tight. Have the spark plug adjusted to the cor-
rect torque as soon as possible with a torque-
wrench.
EMU28962
Checking fuel system
Standard spark plug:
LFR5A-11
EWM00060
WARNING
Gasoline and its vapors are highly flam-
mable and explosive. Keep away from
sparks, cigarettes, flames, or other sourc-
es of ignition.
Before fitting the spark plug, measure the
electrode gap with a wire thickness gauge;
adjust the gap to specification if necessary.
EWM00910
WARNING
Leaking fuel can result in fire or explosion.
q
q
Check for fuel leakage regularly.
If any fuel leakage is found, the fuel sys-
tem must be repaired by a qualified me-
chanic. Improper repairs can make the
outboard unsafe to operate.
Check the fuel lines for leaks, crack, or mal-
function. If a problem is found, your Yamaha
dealer or other qualified mechanic should re-
pair it immediately.
1.
2.
Spark plug gap
Spark plug part number
3
. Spark plug I.D. mark (NGK)
Spark plug gap:
1.0
–1.1 mm (0.039–0.043 in)
59
| Categories | Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha F200, Yamaha F225, Yamaha LF200, Yamaha LF225 |
| Model Year | 2007 |
| Download File |
|
| Language | English |
| Product Brand | Yamaha Motor. Yamaha Motor Corporation, USA - Support Customer Relations for US: 1-800-962-7926
Yamaha Boats: 1-800-962-7926 Yamaha Outboard Customer Relations: 1-866-894-1626 , Yamaha Outboard |
| Document File Type | |
| Publisher | yamaha-motor.com |
| Wikipedia's Page | Yamaha Motor Company |
| Copyright | Attribution Non-commercial |
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