Yamaha F100A - Oil Pressure Measurement

3-19
INSP
ADJ
E
GENERAL
5. Measure:
● Compression pressure
Below minimum compression pres-
sure → Inspect valve clearance, valve
face, valve seat, piston rings, cylinder
sleeve, piston, cylinder head gasket
and cylinder head.
6. Remove:
● Compression gauge
7. Install:
● Spark plug(-s)
Compression pressure:
Minimum:
950 kPa (9.5 kg/cm
2
, 135 psi)
Measurement steps:
● Remove the lock plate from the engine
stop lanyard switch on the remote
control box.
● With the throttle wide open, crank the
engine setting the main switch in the
START position until the reading on
the compression gauge stabilizes.
Oil pressure measurement
1. Warm-up:
● Engine
2. Remove:
● Oil pressure switch
3. Install:
● Oil pressure gauge 1
(into the oil pressure switch hole)
NOTE:
Use a pressure gauge with the range of 0 to
10 kg/cm
2
and an adopter with a PT 1/8
thread.