Suzuki DF 25, Service Manual, Page: 78 / 148

6-12 POWER UNIT
Water jacket
Inspect the water jackets for clog or obstruction. Clean the water
jackets if necessary.
ROCKER ARM AND ROCKER ARM SHAFT
Inspect the rocker arm for wear, crack or other damage.
Replace it necessary.
Inspect the rocker arm shaft for wear, bend or other damage.
Replace it necessary.
Rocker arm shaft hole diameter
Measure the rocker arm shaft hole diameter using a small bore
gauge.
Rocker arm shaft hole diameter:
Standard: 4.015 – 4.027 mm (0.1581 – 0.1585 in)
Rocker arm shaft outside diameter
Measure the rocker arm shaft diameter using the micrometer.

09900-20205: Micrometer
Rocker arm shaft outside diameter:
Standard: 3.990 – 4.005 mm (0.1571 – 0.1577 in)
PUSH ROD
Inspect the push rod for bend or other damage.
Replace it necessary.