Yamaha F50A - Checking the Thermostat

62Y3A11
3-12
1
2
3
4
5
6
7
8
I
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.
5. Install the spark plug, tighten it finger
tight
b
, then to the specified torque with
a spark plug wrench
c
.
Checking the thermostat
1. Remove the cover
1
, thermostat cover
2
, and thermostat
3
.
2. Suspend the thermostat in a container of
water.
3. Place a thermometer in the water and
slowly heat the water.
Specified spark plug: DPR6EA-9 (NGK)
Spark plug gap
a
: 0.9 mm (0.035 in)
Spark plug: 18 N·m (1.8 kgf·m, 13 ft·lb)
S62Y3290
3
2
1
S62Y3300
Power unit