Subaru EH72-2D Istruzioni per l'uso e l'installazione

SERVICE INFORMATION

ISSUE EMD-EU6947

PRINTED IN JAPAN

February 2010

EH72-2D

CONTENTS

Section Title Page

1. SPECIFICATIONS.1

2. FEATURES .2

3. DISASSEMBLY AND REASSEMBLY.3

3-1..PREPARATIONS.AND.SUGGESTIONS.3

3-2..SPECIAL.TOOLS.3

3-3..DISASSEMBLY.PROCEDURES.(DIFFERENCE).                                       4

3-4..REASSEMBLY.PROCEDURES.(DIFFERENCE).                                       6

3-5.BREAK-IN.OPERATION.8

4-1.CARBURETOR.9

4-2.COMPORNENT.PARTS..11

PREFACE

This.manual.covers.the.service.information,.trouble.shooting.procedures.and.so.on.of..

EH72-2.engine

Careful.observance.of.the.instructions.given.herein.will.result.in.better,.safer.and.faster.

service.work

For.more.detailed.instructions.of.disassembling.and.reassembling.procedures,.please..

refer.to.the.service.manual.for.EH63,.64,.65.and.72

-.1.-

1. SPECIFICATIONS

Model EH72-2D

Type Air-Cooled,.4-Stroke,.V-Twin.Cylinder,.Horizontal.PTO.shaft,..

OHV.Gasoline.Engine

Number of Cylinders - Bore

Stroke mm (in.)

2.-.84.×.65.(331.×.256)

Displacement ml (cu.in.) 720.(439)

Compression Ratio 87

Continuous Output kW(HP)/r.p.m. 142.(190)./.3600

Maximum Output kW(HP)/r.p.m. Gross.:.187.(250)./.3600

Maximum Torque N•m / r.p.m.

(kgf•m / r.p.m.)

(ft•lb. / r.p.m.)

510./.2800

.(52./.2800)

(376./.2800)

Direction of Rotation Counterclockwise.as.viewed.from.the.PTO.shaft.side

Cooling System Forced.air.cooling

Valve Arrangement Overhead.Valve.(OHV)

Lubrication Full.pressure.type.with.oil.Cooler

Lubricant Automobile.engine.oil.SAE.#20,.#30.or.10W-30;..

Class.SE.or.higher

Capacity of Lubricant L (U.S. gal.) 155.(041)

Carburetor 2-.Barrel.side.draft.type

Fuel Automotive.unleaded.gasoline

Fuel Feed System Diaphragm.Fuel.pump.(Pulse.type)

Ignition System Flywheel.Magneto.(Solid.state)

Spark Plug BPR5ES(NGK).or.BPR4EY(NGK)

Charging Capacity V - A 12.-.15.or.12.-.30.(Option)

Starting System Electric.Starter

Governor System Centrifugal.Flyweight.type

Air cleaner Double.Element.type

Dry Weight kg (lb.)

with out muffler and control box 46.(1013)

with STD muffler and control box 515.(1134)

Dimensions

(L×W×H) mm (in.)

with out muffler and control box 317×477×480.(125×188×189)

with STD muffler and control box 464×499×480.(183×196×189)

* Specifications are subject to change without notice.

-.2.-

2. FEATURES

HIGH OUTPUT, TORQUE AND DURABILITY

720cc.displacement.which.is.the.largest.among.25.horsepower.classed.engines,.produces.high.

torque.from.the.low.speed.range.High.durability.with.less.than.1%.horsepower.drop.after.300.

hours.of.full-throttle.operation

Furthermore,.the.new.generation.of.EH72.(EH72-2).has.achieved.higher.output.by.adopting..

2-.Barrel.Side.draft.carburetor.system,.which.increases.intake.airflow.and.optimally.distributes..

air-fuel.to.each.cylinder,.as.well.as.optimizing.camshaft.profile.and.increasing.compression.ratio

HEAVY DUTY CONSTRUCTON

Reliable.structure.with.pressure.lubrication,.cast.iron.cylinder.sleeve.and.dual.air.cleaner.element.

Also,.heavy.duty.ball.bearing.installed.on.PTO.side

SUPERIOR OIL CONTROL

In.addition.to.the.excellent.oil.control.by.3.pieces.oil.rings,.adoption.of.valve.stem.seal.and.high.

cooling.capability.reduce.oil.consumption.This.enables.longer.oil.maintenance.interval.together.

with.largest.lubrication.oil.capacity.in.this.class

INTAKE MANIFOLD

-.3.-

3. DISASSEMBLY AND REASSEMBLY

3-1 PREPARATIONS AND SUGGESTIONS

(1)..When.disassembling.the.engine,.memorize.the.locations.of.individual.parts.so.that.they.can.

be.reassembled.correctly.If.you.are.uncertain.of.identifying.some.parts,.it.is.suggested.that.

tags.be.attached.to.them

(2)..Have.boxes.ready.to.keep.disassembled.parts.by.group

(3)..To.prevent.losing.and.misplacing,.temporarily.assemble.each.group.of.disassembled.parts

(4)..Carefully.handle.disassembled.parts,.and.clean.them.with.washing.oil.if.necessary

(5)..Use.the.correct.tools.in.the.correct.way

(6)..When.disconnecting.electric.wirings,.be.sure.to.hold.and.disconnect.the.connector.housing

3-2 SPECIAL TOOLS

No.Special.Tool.is.needed.for.disassembling.and.reassembling.the.engine

For.pulling.off.the.flywheel,.universal.type.puller.being.popular.in.the.market.place.as.shown.in.

the.illustration.is.needed.

Description Parts number

Flywheel.puller.for.pulling.off.the.flywheel

Flywheel puller with bolt

228-95001-17

-.4.-

3-3 DISASSEMBLY PROCEDURES (DIFFERENCE)

Step Parts to remove Remarks and procedures Parts Fasteners

Chock.control.

lever.and.link

(1) Disconnect the choke rod holder and remove

the choke control rod. (See Fig. 3-1)

(2) Remove the choke knob.

CONTROL BOX

CHOKE

CONTROL ROD

RETURN

SPRING

LINK PIVOT

CHOKE

CONTROL

LINK

CHOKE

KNOB

CLAMP

M5 TAPPING

SCREW

BLOWER HOUSING

M6 FLANGE BOLT

M6 FLANGE

BOLT

STEP 8

Fig.3-1

-.5.-

Step Parts to remove Remarks and procedures Parts Fasteners

Carburetor (1)..At.first.remove.fuel.pipe.(See.Fig3-2).

(2)..Remove.the.governor.rod.spring.from.rod.holder.

(3)..Pick.up.the.rod.holder.and.remove.the.governor.rod

(See.Fig3-3)

(4)..Remove.the.nuts,.adapter.and.Carburetor.from.the.

intake.manifold.(See.Fig3-4)

M6.Flange.nut.:.4pcs

FUEL PIPE

GOVERNOR ROD

ROD HOLDER

Turn the rod holder

clockwise to loosen.

VIEW A

Fig.3-2 Fig.3-3

Fig.3-4

SPARK PLUG CAP

GROMMT (PLUG CAP)

#2 CYLINDER SIDE ONLY

AS OPTION #1 CYLINDER SIDE

#1 CYLINDER SIDE

#2 CYLINDER SIDE

STEP 9

-.6.-

22) CARBURETOR

Set.gasket.onto.intake.manifold.and.install.

carburetor

M6.Flange.nut.:.4pcs

23) CHOKE CONTROL

Attach.chock.control.link.between.carburetor.

chock.lever.and.chock.control.lever

Attach.governor.spring.between.governor.

lever.and.speed.control.lever

3-4 REASSEMBLY PROCEDURES (DIFFERENCE)

#2 CYLINDER SIDE

SPARK PLUG CAP

GROMMT (PLUG CAP)

#2 CYLINDER SIDE ONLY

GASKET

(CARBURETOR)

CARBURETOR

GASKET

(ADAPTER)

CLEANER

ADAPTER

CHOKE

CONTROL ROD

RETURN

SPRING

LINK PIVOT

CHOKE

CONTROL

LINK

CHOKE

KNOB

CLAMP

M5 TAPPING

SCREW

Tightening torque

166.-.186.N•m

(170.-.190.kgf•cm)

(123.-.137.ft•lb)

The marking down wards.

GASKET (ADAPTER) GASKET (CARBURETOR)

-.7.-

25) SPEED CONTROL LEVER

(1)..Install.speed.control.bracket.onto.intake.

manifold

(2)..Attach.return.spring,.spacer,.friction.

washer,.wing.nut,.etc.to.speed.control.lever.

as.shown.in.the..ilustration

(3)..Connect.governor.spring.to.governor.lever.

and.speed.control.lever

STOP PLATE

SPRING WASHER

SPEED CONTROL

LEVER

M6 FLANGE

BOLT

M6 SELF LOCK

NUT

FRICTION

WASHER

FRICTION

WASHER

BRACKET UNIT,

speed control

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

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Fitting location of governor rod and governor spring

50 Hz 60 Hz (STD)

COLOR Silver Gold

POSITION A-3(a)

GOVERNOR ROD ROD HOLDER

Turn the rod holder

counter clockwise

and fix it.

Then hook the rod

spring as shown

on the diagram.

VIEW A

ROD

SPRING

24) GOVERNOR LEVER

Attach.governor.rod.and.rod.spring.between.

governor.lever.and.carburetor.throttle.lever,.

and.insert..the.governor.lever.to.governor.

lever.shaft.Tighten.locking.bolt.temporarily

GOVERNOR

SHAFT

GOVERNOR

LEVER

ROD SPRING

GOVERNOR

ROD ROD HOLDER

THROTTLE LEVER

CLEANER ADAPTER

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