Shindaiwa 68907-94311 - Manual (Page 11)

11
n INSPECTION.Inspect.the.entire.blower.
and.tubes.for.damage,.including.loose.
or.missing.components,.and.repair.as.
necessary.
n SPARK.PLUG.Replace.the.spark.plug.
with.a.NGK.CMR5H.(or.equivalent),.
gapped.to.0.6mm.(0.04.in.).
n FUEL.FILTER.Use.a.hooked.wire.to.
extract.the.fuel.filter.from.inside.the.fuel.
tank..See.Figure.15..
CAUTION!
Make sure you do not pierce the fuel
line with the end of the hooked wire.
The line is delicate and can be dam-
aged easily.
(more frequently if reduced
performance is noted)
n . Inspect.the.filter.element.for.signs.of.
contamination.from.debris..A.contami-
nated.fuel.filter.should.be.replaced.with.
a.new.Shindaiwa.replacement.element....................
Before.reinstalling.the.filter,.inspect.the.
condition.of.the.fuel.line..If.you.note.
damage.or.deterioration,.the.blower.
should.be.removed.from.service.until.it.
can.be.inspected.by.a.Shindaiwa-trained.
service.technician.
n COOLING.SYSTEM.Use.a.wood.or..
plastic.scraper.and.a.soft.brush.to..
remove.dirt.and.debris.from.the.cylinder.
fins.and.crankcase.
Fuel
Filter
Fuel Tank
Hooked
Wire
Every 50 Hours
Figure 15
Every 10/15 Hours
CAUTION!
Never allow dirt or debris to enter the
cylinder bore! Before removing the
spark plug, thoroughly clean the spark
plug and cylinder head area!
Allow the engine to cool before servic-
ing the spark plug! Cylinder threads
can be damaged by tightening or loos-
ening the spark plug while the engine
is hot!
0.6mm
(0.024 in.)
Clean the spark plug
and check the gap
at the electrode.
Figure 14 NGK CMR5H
Counter-
clockwise
to remove.
1.. Use.the.spark.plug.wrench.to.remove.
the.spark.plug..See.Figure.14.
.. Clean.and.adjust.the.spark.plug.gap..
to.0.6mm.(0.04.in.)..If.the.plug.must.be.
replaced,.use.a.NGK.CMR5H.or.equiva-
lent.type.plug.of.the.correct..
heat.range.
3.. Install.the.spark.plug.finger-tight.in.the.
cylinder.head,.then.tighten.it.firmly.
with.the.spark.plug.wrench..If.a.torque.
wrench.is.available,.torque.the.spark.
plug.to.16.7-18.6.Nm.(148-165.inch-
pounds)
139/150-Hour Maintenance
n . Combustion.chamber.should.be.decar-
bonized,.and.the.valve.clearance.should.
be.adjusted..It.is.highly.recommended.
that.this.is.done.by.a.Shindaiwa-trained.
service.technician.
n . Replace.the.spark.plug.annually:.Use.
only.NGK.CMR5H.or.equivalent..
resistor.type.spark.plug.of.the.correct.
heat.range..Set.spark.plug.electrode.gap.
to.0.6mm.(0.04.in.).
NOTE:
The.NGK.CMR5H.also.meets.the..
requirements.for.electro.magnetic..
compliance.(EMC).
Maintenance after first
139-hours, then every 150-hours
thereafter.
Valve Adjustment
1.. Remove.cylinder.cover,.rocker.arm.cover,.
and.set.piston.at.TDC-compression....
CAUTION!
n
Performing a valve adjustment
incorrectly may cause hard starting
and/or can damage the unit. Refer
to the C-4 Service Manual for com-
plete valve adjustment procedure
and torque specifications.
n If you are unfamiliar with this engine
or uncomfortable with this proce-
dure, consult with an authorized
Shindaiwa servicing dealer.
.. Loosen.adjuster.locknut.so.that.the..5.
mm.Allen.socket.head.adjustment.screw.
can.turn.freely..