13
MAINTENANCE
ENGINE
1. Ignition Plug
Clean the electrode contaminated with exhaust gas or carbon.
Ignition plug used :
NGK B7HS (P572)
NGK B8HS (P455/P476/P555)
Gap :
0.6-0.7
mm
2. Throttle
The operating force of the throttle can be fine-controlled by the adjusting nut
on the throttle body side.
3. Carburetor
In long-time storage of the pump, drain fuel in the carburetor float chamber, as
below:
(1) Close the fuel cock.
(2) Pull the drain cock knob and drain fuel. Drained fuel is received by
Overflow bottle.
(3) When fuel is drained completely, release your hand from the knob.
(4) Dispose of drained fuel in the bottle. Wipe out spilt fuel, if any, with
waste cloth. Enough care should be taken of disposal of the waste
cloth.
(5) Replace the bottle and insert the tubes in it again.
4. Air Cleaner Element
(Except for P572)
Detach the element from the air cleaner, and confirm that it is free of contamination.
If the element is contaminated, clean it with kerosene. After it is cleaned, immerse it in oil mixture (kerosene 2-4:
automobile Mobil oil 1), swing off drops completely and attach it to the cleaner main unit.
P455/P476/P555
P572
Air cleaner
cover
DANGER
Overflow bottle
Drain cock knob
0.6mm
~
0.7mm
Air Cleaner
Main Unit
Air Cleaner
Element