Checking The Propeller - Yamaha 25BMH Service Manual

CHK
GENERAL
ADJ
3. Check:
• Spark plug type
Incorrect → Replace.
Standard spark plug
25B:
NGK BR7HS-10
30H:
NGK BR8HS-10
4. Measure:
• Spark plug gap
Out of specification → Replace.
Spark plug gap
0.9-1.0 mm (0.035-0.039 in)
5. Tighten:
• Spark plug
Spark plug
25 N
•
NOTE:
• Before installing the spark plug, clean
the gasket surface and spark plug sur-
face. Also, it is suggested to apply a
thin film of anti-seize compound to the
spark plug threads to prevent thread
seizure.
• If a torque wrench is not available, a
good estimate of the correct tightening
torque is to finger tighten
plug and then tighten it another 1/4 to
1/2 of a turn

CHECKING THE PROPELLER

Check:
• Propeller
• Spline
Wear/cracks/damage → Replace.
3-23
1
a
m (2.5 kgf m, 18 ft
• •
a
b
.
E
lb)
the spark