Periodic Check And Adjustment; Power Unit; Checking The Spark Plug; Checking The Thermostat - Yamaha E115A Service Manual

CHK
ADJ

Power unit

Checking the spark plug

1. Disconnect the spark plug caps, and then
remove the spark plugs.
2. Clean the electrodes 1 with a spark plug
cleaner or wire brush. Replace the spark
plug if necessary.
3. Check the electrodes for erosion and
excessive carbon or other deposits, and
the gasket for damage. Replace the
spark plug if necessary.
4. Check the spark plug gap a. Adjust if out
of specification.
Specified spark plug:
E115AMH, E115AWH
B8HS-10 (NGK)
E115AE, E115AET
B8HS-10, BR8HS-10 (NGK)
115B
B8HS-10, BR8HS-10 (NGK)
140B
B9HS-10, BR9HS-10 (NGK)
Spark plug gap a:
0.9–1.0 mm (0.035–0.039 in)
3-3

Periodic check and adjustment

1
6B430025
a
6B430030
5. Install the spark plug temporary tight,
then to the specified torque with a spark
plug wrench.
Spark plug:
25 N·m (2.5 kgf·m, 18.4 ft·lb)

Checking the thermostat

1. Remove the thermostat covers 1, gas-
kets 2, and thermostats 3.
2. Suspend the thermostats 3 in a con-
tainer with water.
3. Place a thermometer in the water and
slowly heat the water.
4. Check the thermostat valve opening at
the specified
Replace if out of specification.
2
3
1
61U30210
6B430060
water temperatures.
6B430070
61U5H11