Weifang 495 - Key Switch; Preheating-Starting Switch; Maintenance of Electrical Systern; Maintenance of Battery

more than 30 seconds each time.
During the installation of the prehe~ter, it is forbid.den to
wrench the nut "3" ,but wrench the adapter "5" instead ,in order to
prevent the terminal" 4" from getting damaged.
If the preheater drops fuel in cold state, switch on the pre-
heater for 5- 6 senconds ,then tighten the needle valve with a pair
of sharp nose' pliers ,the trouble will get remedied accordingly.
(6)Key Switch:
There are three operating positions on the key 'switch of mod-
el ]K - 405. When the key is turned to the intermediate position,
the whole circuit is cut off. Both the preheating - starting switch
and the regulator will be swit~hed on by turning the key clock-
wise. At this time, the engine can be started. As soon as the engine
is started, the 'k-f:'>":l should be turned counterclockwise to the end
immediately. No'w, only the regulator is swiched on so that the
gen~rator can charge the battery but the starting motor can't be
started so as to avoid accident.
(7)Preheating-Starting Switch
T·here are four operating positions on the preheating-starting
switch of model JK.- 290. When the switch is turned to the pre-
heating "position" the preheater will be switched on. only; whe'n
the switch is turned to the "starting" position, the starting motor
will be switched on Inly while the switch is turned to the ·"preheat-,
ing. and starting" position, both the pre heater and the starting mo-
tor will· be switched on ,turning the switch to the "O"pqsition,the
whole circuit will be switched off.
2) Maintenance of Electrical Sys tern
(1) Maintenance of Battery
A. The batteries delivered with the engIne have not been
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