Yamaha F100A, Service Manual

Page: 100 / 463

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.