Exhaust Control System; Maintenance - Varan Motors WY1P70FV-2 Manuel D'utilisation

Having preheated the engine , push back the choke lever
Set the throttle lever in proper position to ensure the engine
runs at required velocity.
Stop the engine in the following sequence:
Slowly push the throttle lever to the original position.
Set the fuel switch to "OFF" (Fig . 8).
It is forbidden to rapidly stop the engine under heavy loading at high speed , otherwise , damage
to equipment may occur.
W ith the engine running , carbon monoxide , oxide of nitrogen and hydrocarbon will produce , and
in c ertain c onditions , oxide o f nitrogen and hydrocarbon will r eact c hemically e ach o ther t o make
smoke while carbon monoxide is toxic , so exhaust control of them is very important . The company
decreases t he e xhaust emissions b y introducing poor－fuel carburetors a nd o ther d evices i nto the
engine to solve the problem.
To keep the exhaust of your of engine within the standard exhaust emission values , pay attention to
the following.

.MAINTENANCE

M aintain the engine periodically in accordance with the maintenance schedule in the manual . The
maintenance schedule is made out o n the base o f nor mal u se i n normal conditions , i f using under
heavy load , dusty or wet circumstances or at high temperature , service of the engine should be done
.REPLACENT OF PARTS
W e recommend t hat you s hould choose such p arts w hich a re m anufactured b y our C o . or
equivalent to these in quality as replacement ones . Replacement without so high quality may impair
the exhaust control system in effectiveness.
.MODIFYING
M odifying the exhaust control system may make actual e xhaust emissions e xceeding statutory
limit values . Illegal modification is as follows:
Dismantle or modify any part of air inlet or outlet system .
Modify or take off speed－adjusting connection device or speed adjustment device to result in
the engine's running beyond the set parameters.
.PROBLEMS AFFECTING EXHAUST EMISSIONS
Difficult starting or difficult stopping.
Unstable idling.
Give off black smoke or consume too much fuel.
Poor ignition sparks or sparks returned.
Ignition is too advanced.
Once you find any of above Problems , contact your dealer for help.
OPERATION
STOP

EXHAUST CONTROL SYSTEM

29
Fig.8