Service Points; Compression Pressure Measurement - Yamaha WaveRunner FX160 Wartungshandbuch

POWR
2
ENGINE UNIT
1

SERVICE POINTS

Compression pressure measurement

The following procedure applies to all of the
cylinders.
NOTE:
Insufficient compression pressure will result in
a loss of performance.
1. Measure:
• Valve clearance
Out of specification → Adjust.
Refer to "POWER UNIT" in Chapter 3.
2. Warm the engine up, and then put the
watercraft in a horizontal position.
3. Remove:
• Air filter case cover 1
• Air filter element
• Ignition coils
• Spark plugs
CAUTION:
Before removing the spark plugs, use com-
pressed air to blow away any dirt accumu-
lated in the spark plug wells to prevent it
from falling into the cylinders.
4. Install:
• Compression gauge extension 1
• Compression gauge 2
Compression gauge extension:
90890-06582
Compression gauge:
YU-33223-1/90890-03160
5-4
E