Maintenance
Yamaha dealer. You should periodically re- are fitting a spark plug, a good estimate of
move and inspect the spark plug because the correct torque is 1/4 to 1/2 a turn past fin-
heat and deposits will cause the spark plug ger-tight. Have the spark plug adjusted to the
to slowly break down and erode. If electrode correct torque as soon as possible with a
erosion becomes excessive, or if carbon and
other deposits are excessive, you should re-
place the spark plug with another of the cor-
rect type.
torque-wrench.
EMU28962
Checking fuel system
EWM00060
WARNING
Standard spark plug:
Gasoline and its vapors are highly flam-
mable and explosive. Keep away from
40TR
50TR
B7HS-10
B8HS-10
sparks,
cigarettes,
flames,
or
other
sources 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 explo-
sion.
q
q
Check for fuel leakage regularly.
If any fuel leakage is found, the fuel
system must be repaired by a qualified
mechanic. 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 I.D. mark (NGK)
Spark plug gap:
0.9
–1.0 mm (0.035–0.039 in)
When fitting the plug, always clean the gas-
ket surface and use a new gasket. Wipe off
any dirt from the threads and screw in the
spark plug to the correct torque.
Spark plug torque:
25.0
Nm (18.4 ft-lb) (2.55 kgf-m)
NOTE:
If a torque-wrench is not available when you
50
| Categories | Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha 40, Yamaha 50 |
| Model Year | 2006 |
| 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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