Rato RT50ZB26-3.6Q, Service Manual, Page: 17 / 60

3. MAINTENANCE
14
3
）
Clean the polyurethane element with cleaning
oil, then blow with compressed air or squeeze.
Dip the element in clean oil, then, forcefully
squeeze and install it back.
3-4 Fuel oil cup cleaning
Caution
· Don’t smoke in washing.
· Be sure not to fuel leaking after
tightening.
Turn the fuel cock to OFF position and tighten filter cup.
Torque
：
7N.m
3-5 spark plug cleaning and
Adjusting
1
）
Remove carbon or other deposits with a stiff wire brush.
Check gasket for damaged.
2
）
Measure plug gap between center electrode and side
electrode with spark plug feeler. If necessary, adjust the gap by
bending the side electrode.
Spark plug gap 0.7 - 0.8 mm
Standard spark
plug
BP6ES
（
NGK
）
F7TC
BPR6ES
（
NGK
）
……anti-wave
interference uses
F7RTC ……anti-wave interference
uses
3-6 Valve clearance adjustment
CAUTION
：
Valve clearance adjustment must be per formed with the
engine cold.
1
）
Remove the cylinder head cover bolt, head cover and gasket.
SPARK PLUG
GAP
0.7-0.8MM
SIDE
ELECTRODE
WIRE BRUSH
OFF
SEAL RING
FILTER OIL CUP
CYLINDER HEAD COVER BOLT
CYLINDER HEAD COVER
GASKET