PARMA-TECHNIK MIKRON III A User Manual

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MIKRON III A
MAINTENANCE 21
7.3. Valve Clearance Adjustment
Valve clearance adjustment is carried out on cold engine and both the
inlet and exhaust valve clearances are adjusted to 0.1 mm. The valve
clearance is measured by a feeler gauge between the valve and the valve
rocker roller ter the cover of the valve rocker compartment was
removed. Valve earance adjustment is carri out, with the piston of
the corresponding cylinder in its top dead centre of the compression
stroke, or according to the valve overlap, as lows:
- Start with the cylinder No. 1 (valve overlap cylinder NO.4) and
then proceed in accordance with the firing each time turning
the crankshaft by 180 deg. in the sence of rotation, i.e. cylinder
NO.3 (NO. 2 cylinder valve overlap), then inder NO.4 (No. 1
cylinder valve overlap) and finally cylinder No. 2 (No.3 cylinder
valve overlap) .
The feeler gauge should fit without any play, but should not be
clamped.
Clearance adjustment is accomplished
after loosening the lock nuts. The
completing the adjustment.
by
lo
me
ck
ans
nuts
adjustment screws
are tightened after
7.4. Adjustment of Ignition Timing
The ignition
spark advance
magnetos used
control.
on the engine are fit with centrifugal
Basic advanced ignition timing carry out after adjusting breaker
contact gap within 0.30 - 0.40 mm by Scintilla magneto or 0.25 - 0.35 mm
by LUN 2225 magneto to the following values:
- left-hand magneto 5 deg. before top dead centre
- right-hand magneto 10 deg. before top dead centre
.
Breaker contact surfaces should be clean, free of damage and
at the instant of closing.
Adjust ignition timing, after loosening the clamping sleeve
then turn
I
the magneto opposite to its rotor sence of rotation to
iminate
backlash, with correctly adjus value of spark advance on
the
I
crankshaft (in detail se 12.2.). Correct position is at the moment
when
the contacts break up.
Accurate ignition timing adjustment:' is accomplished during engine test
run so that switching any of the two ignition magnetos 'OFF results
an engine speed drop by fUl'l-throttle within 30-50 rpm.
7.5. Spark Plugs
Use spark plugs given in 3.2.,
checking the condition of
r
ectrodes.
Issued 9/95

PARMA-TECHNIK MIKRON III A Specifications

General

Brand	PARMA-TECHNIK
Model	MIKRON III A
Category	Engine
Language	English