MAG 1040-SRL Operating Instructions Manual page 12

TO START THE ENGINE WHEN RUNNING
WITH PARAFFIN (KEROSENE)
Before starting the cold engine, the float chamber drain plug has to be
opened to drain the remaining paraffin (kerosene) .
Put the three way fuel cock on
«
petrol
»
operation . The engine should
operate on petrol for 3-5 minutes under load to reach its normal operating
temperature . Then switch the fuel cock over for
«
paraffin
»
operation .
TO STOP THE ENGINE
a) When running with petrol : Put the engine into idling speed end press
the stop button (C, Fig .
1).
Close the fuel cock .
b)
When running with paraffin : Switch the fuel cock over to
«
petrol
»
position and let the engine run for
2-3
minutes. Then put the engine
into idling speed and press the stop button (C, Fig . 1). Close the fuel
cock if the engine if filled with a stop button.
CYLINDER HEAD
After replacement of the cylinder head gasket tighten the nuts in 3 steps.
Thightening order as shown on Fig.
4.
Torque wrench settings :
5,2
kpm
(37.6
lb. ft .)
Fig . 4
TO ADJUST THE VALVE CLEARANCE
Fig . 5
Check the valv clearance, when the englne is cold (see technical Data ).
The valve clearance 1 01 should be measured with a feeler gauge between
the valve stem and the tappet cap when the tappet is on B. D. C. There
are tappet caps with various base thicknesses (ZI from
3,0-5,2
mm, wlth
increments of
0,2
mm . There are also shims IP) of
0,
1 mm thickness . The
valve clearance is set by cha nging the tappet caps and, II necessary,
adding a shim .
10
TO ADJUST THE GOVERNOS CONTROL
ASSEMBLY
i
S \ ' . .. :
A r" ,,, ~V
X~
j
1
..
"'l-:r-"'t
-(1- -~--. . ~ •
r-;;----"
J
1 •'" 1 _,, '
1 j1 •~ ,.. : 1 , ..
l
'~l
I
Ai~'
l
H--tl .,-'..
j :..---~·•~ "- __ _,
II . . '
(.------J
II~ .., ,•-----•,
~
r Ir·• ,
1
'""' F
1 1
--
~-~~-'
E
Fig . 6
1.
Anchor the hooked ends of the governor spring
I
EI into the center
hole of the governor lever (BI, if not specified otherwise, and the
spring guide ( F).
2.
Insert the control rod (Al into the hole of the throttle lever
(V)
and
fit
the governor ·1ever. (B) together with the control rod (Al to the
governor spindle (C).
3. When the throttle valve is fully closed (i.e. in idle running position .l,
be sure that between the pin (SI and the support (HI a gap
(X)
2 mm is left. -
4. Tighten slightly lever fixing screw
(D) . Ho!d lever (B) in the rigA
end position and, by means of a screw driver, turn shaft (Cl ant~ '
clockwise. Then turn the Jever (BI anticlockwise to the end position
and tighten definitely lever fixing screw (D) .
F
Fig . 7
Carburettor adjustment has always to be made on a warmed up engine.
The carburettor setting is made by t he use of a correctly sized main jet in
accordance with the engine operating conditions .
1. At idling speed, the correct fuel -air ratio is obtained by adjustement
of the idling mixture screw (K , Fig . 7). The idling mixture screw has
to be closed carefully, then unscrewed by 1
114
turn (basic adjustment).
2. After the engine is warmed up at its normal operating temperature, set
t he idling speed in accordance with t he specifi cations (abouit 1 000
r. p.m.) by adjusting t he throttle stop screw (F, Fig . 7). Check the
engine speed with a revolut ion counter.
3. The idling mixtu re screw (K, Fig. 71 has to be screwed in resp. out
until the engine speed does not increase any more and a smooth
operation is obtained.
4. The required idling speed can be set with the throttle stop screw
(F, Fig. 71 . The engine speed should accelerate frankly without
«
huntlng >>. In the opposite, the idling mixture screw (K, Fig . 71 has
usually to be adjusted for a richer mixture but sometimes it may also
be necessary to lean the mixture.
After setting ensure that ldling speed is stable.
IMPO RTANT: Ensure that the ai r filter is clean (see maintenance
instructions on page 12). A blocked or partially choked
air filter will restrict the flow of air into the cylinder and
cause a too rich mixture. Latter one will wash the
lubrication from the cylinder wall, dilute the oil in the
cronkcase and therefore lead to rapid wear of the englne.