Robin EY14 User manual

ROBIN AMERICA, mc.
ROBIN TO WISCONSIN ROBIN
ENGINE MODEL CROSS REFERENCE LIST
ROBIN WISCONSIN ROBIN
-
EY08
EYl5
EY
15V
EY20
EY2OV
EY23
EY28
EY35
EY40
EY45V
EY2
1
EY44
EY25
EY27
EY18-3
EHl1
EH12
EH15
EH17
EH21
EH25
EH30
EH3OV
EH34
EH34V
EH43V
EC13V
DY23
DY27
DY30
DY35
DY4 1
W1-080
W1-145
W1-145V
w1-185
W1-185V
Wl-230
W 1-280
W1-340
W1-390
W1-450V
EY21W
EY44W
EY
18-3W
EY25W
EY27W
TWO
CYCLE
WOl-115
WOl-120
WO1-150
WO1-170
wo1-210
WO1-250
WO 1-300
WO 1 -300v
WO 1-340
WO 1 -340V
WO 1 -430V
WT1-125V
WRD 1-230
WRD 1-270
WRD 1-300
WRD1-350
wRDl-410

CONTENTS
Section Title Page
...........................................
1 . SPECIFICATIONS 1
2 . PERFORMANCE ........................................... 2
2-1MaximumOutput
........................................ 2
2-2Continuous Rated Output
.................................. 2
2-3 MaximumTorque andFuel ConsumptionRatio at Max . Output ......... 2
3 . FEATURES ................................................ 4
4 . GENERALDESCRIPTION of ENGINECONSTRUCTION ............... 4
4-1 Cylinder Crankcase ...................................... 4
4-2 Main BearingCover
....................................... 4
4-3Crankshaft
........................................... 4
4-5 Camshaft
............................................. 4
4-7 Cylinder Head .......................................... 5
4-8 Governor ............................................. 5
4-9 Cooling ............................................... 5
4-10 Lubrication ............................................ 5
4-11Ignition .............................................. 5
4-13 Air Cleaner
............................................ 5
4-14SectionalView of Engine ................................... 6
4.4 Connecting RodandPiston ................................. 4
4-6Valve Arrangement
....................................... 5
4-12Carburetor
............................................ 5
5.lNSTALLATlON ............................................ 14
5-1Installing
.............................................. 14
5-2Ventilation
............................................ 14
5-3Exhaust Gas Evacuation .................................... 14
5-4 Fuel System ........................................... 14
5-5 PowerTransmission to Driven Machines
......................... 14
5-6 Wiring ............................................. 15
6 . DISASSEMBLY and REASSEMBLY .............................. 21
6-1 PreparationandSuggestions ................................. 21
6-2 Special Tools
........................................... 21
6-3 DisassemblyandRessemblyProcedures ......................... 22

7.MAGNETO ................................................ 29
7-1 Magneto
............................................. 29
7-2 Breaker PointAdjustment .................................. 29
74 Magneto TroubleShooting
................................... 31
7-3 Timing Adjustment ....................................... 30
8 . GOVERNORADJUSTMENT ................................... 32
9. CARBURETOR ............................................. 33
9-1 Operation and Construction ................................. 33
9-2 Disassembly and Reassembly ................................ 34
9-3Adjustment ............................................ 36
10 . RUN-INOPERATION of REASSEMBLEDENGINE ................... 37
11 . TROUBLESHOOTtNG ....................................... 38
11 -1 Starting Difficulties ....................................... 38
11 -2 Engine Misses ........................................... 39
11-3 EngineStops ........................................... 39
114 EngineOverheats ........................................ 39
11-5 Engine Knocks ......................................... 40
11-6 Engine BackfiresThroughCarburetor ........................... 40
12 . CHECKS ANDCORRECTIONS ................................. 41
13 . CORRECTIONTABLE ....................................... 42
14 . MAINTENANCE and STORING ................................. 48
14-1Daily Checksand maintenance(Every 8 Hours) .................... 48
14-2 Every 20 Hours ChecksandMaintenance ........................ 48
14-3 Every 50 Hours (10 Day) ChecksandMaintenance .................. 48
14-4 Every 100 . 200Hours (Monthly)Checks and Maintenance ............ 48
14-5 Every 500
. 600Hours(Semianual) Checksand Maintenance ........... 49
14-6 Every 1000 Hours (Yearly) Checks
and Maintenance ................. 49
14-7 PreparationforLong-Term Storage ............................ 49

1. SPEC1 FICATIONS
[ N
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p 52 0
n
0"
V
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1
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I
I
i
-1 -

2. PERFORMANCE
2-1 MAXIMUM OUTPUT n
TheMaximumoutput of an engine is such standard power as developed by that engine, after its
initialrun-inperiodwith all the movingpartsproperlyworn-in,whenoperatingwiththefully
openthrottlevalve.Therefore,it
follows that a newenginemaynotdevelopthismaximum
output in
the beginning, because moving parts are not in a properly worn-in condition.
2-2 CONTINUOUSRATEDOUTPUT
Thecontinuous rated outputofanengine is such powerasdeveloped by that enginewhen
running
at anoptimumspeedmostfavorablefromthepointofviewofenginelifeandfuel
consumptionratio.Therefore,itfollowsthatwhendesigning a drivingsystemforany
mechanism,with a modelEY14,EY18-3,EY23, EY25-2 and EY27-2 engine, as a prime mover,
the continuouspowerrequirementof that mechanismmust be keptbelow the continuous rated
output specified.
2-3 MAXIMUM TORQUE and FUELCONSUMPTIONRATIO AT MAX.OUTPUT
The maximum torque of an engine is that driving torque of the driving shaft at which the engine
is drivinganexternalload, while the engine is developing its max.output.Thefuel
consumptionratio
at max.output is that fuelconsumptionratio of anenginewhile that engine
is running at the rnax. output.
PERFORMANCECURVE PERFORMANCECURVE
MODELEY18-38
-2-

PERFORMANCE CURVE
MODEL EY23
7
( ) for B type
1.5(3.0)
1.0 (2.0)
6
I
5
kg-m
HP I4
3
I
g1HP.h
3 50
2 300
250
2000
3000
4000
(1 000)
(1 500)
(2000)
rpm __c
PERFORMANCECURVE
MODELEY25-2
( ) for B type
.h
PERFORMANCECURVE
MODELEY27-2
( ) for 8 type
1.4(2.8)
1.3(2.6)
7 I
kg-m
6
5
HP I4
3
I
g1HP.h
340
2 320
2500
3000
3500
4000
(1250)
(1500)
(1750)
(2000)
rpm -
-3 -

FEATURES
A compact,lightweightanddurable4-cycleair-cooledenginewithhighpoweroutput,
embodyingingeniousdesigntechniqueandadvancedproductionskill. n
Simple construction, smart appearance, easy start.
Reliablepowerforwide.varietyofpurposes,withsmoothspeedcontrollby a governor,
under varying load conditions.
Economical advantage throughlow fuel consumption.
Great versatility in installation through
a 360° belt extension possibility and a two side oil
fill and drain arrangement.
GENERALDESCRIPTJON of ENGINECONSTRUCTION
CYLINDER,CRANKCASE
The cylinderand the crankcase are die-cast as a compactaluminium mono-block piece. The
cylinderlinerand the valve seats are madeofspecialalloy cast ironand are imbeddedin the
aluminiumcasting as inserts.Theintakeandexhaustports are located at oneside of the
cylinder and are also made of inserted pieces in the casting.
Thecrankcase
is separable at thedriving shaft sideandthisseparablepiececonstitutes the
main bearing cover.
4-2 MAINBEARING COVER
As thealuminiumdie-castmainbearingcover is builtontothecrankcaseonthedrivingshaft
side,theengine'inside
are reached forinspection,easilybysimplyremovingit.It is also
providedwith a flangeand boss fordirectlymountingoperatingmachinessuch as generators
and pumps.
There
are two oil filters serving also as oil gauges provided at two locations.
(However, in
EY18-3 or EY23 engine, at one location in the carburetor side.)
4-3 CRANKSHAFT
Thecrankshaftismachinedfrom a carbon steel forgingwith an inductionhardenedcrank pin.
On the fanside, the breaker camisprovidedandon the drivingside, the crankshaft gear is
force-fit.
44 CONNECTINGROD and PISTON
The connecting rod is machined from an aluminium alloy forging in which the forged alloy itself
serves as the bearingmetal at both ends.On the largeend,anoilscraper for splashing the
lubricating oil is provided.
Thepistonismachinedfromanaluminiumalloycastingand is providedwithtwogrooves for
compression rings and one groove for the oil ring.
4-5 CAMSHAFT
Thecamshaftismachinedfrom a carbon steel forgingwithintegralintakeandexhaustcams
and
is providedwith a force-fitcamgear. In the model B engine, the camshaft serves also as
the drivingshaft,beingdriven at half the crankshaftspeed. In the EY14D,EY23D,EY25-2D
and EY27-2D engines, the camshaft ismachinedfrom a specialalloy cast ironwithanintegral
camshaft gear, andissupported by aluminiumbearingmetalsmachinedintegralwith the
crankcase at both ends. (no ball bearing is used)
n
-4 -

4-6 VALVEARRANGEMENT
The exhaust valve ispositioned in the upstream side of the cooling air with the result that the
exhaust valve
is intensively cooled for engine life improvement.
-
4-7 CYLINDER HEAD
A Ricardo type combustion chamber of ample area is employed for good combustion efficiency.
The spark plug
is mounted obliquely to facilitatefuel tank mounting.
4-8 GOVERNOR
The flyweight type governor effectivelyoperatesto maintain the selected speed at varying
load.
The model
EY14,EY18-3 and EY23 engine is equippedwith a separate gearing for the governor
to secure better performance.
4-9 COOLING
Coolingis accomplished by a flow of air circulated past the cylinder walls and head fins from a
combination fan-flywheel.The air
is guided by a cylinder buffle and a head cover. The EY14,
EY18-3, EY23, EY25-2 and EY27-2 engines are equipped with curved vane fans made in two
modifications, each
for direct drive and reduction drive engines.
4-10 LUBRICATION
Lubrication for rotating and sliding parts is accomplished by scoopingandsplashing the oil in
the crankcase
with oil scraper attached toconnecting rod.
4-11IGNITION
The ignition system is of the flywheel magneto type with the ignition timing set 230 before
T.D.C.The magneto comprises a flywheel, ignition coil and abreaker, of which the flywheel
(serving also asafan) is mounted on thecrankshaft and the two other members are mounted
directly
in thecrankcase.(fordetails, refer to 7. MAGNETO section)
The model
EY23 engine normally incorporates an electronic ignition system.
4-12CARBURETOR
A horizontal draftcarburetor is employed. Itssetting has been carefullydetermined after
through testingto achieve best starting,accelerating,fuel consumption, output and other
performances.
For other detailssuch as construction, refer to 9. CARBURETOR section.
4-13 AIR CLEANER
Themodel EY 14, EY18-3 and EY23 engines are equipped with an oval air cleaner incorporating
8 sponge element.
The cycl.one type air cleaner with a semi-wet double element is optional.
The model EY25-2, EY27-2 engines are equipped with an cyclone type semi-wet double element
air cleaner.
-5-

4-14 SECTIONAL VIEW of ENGINE
4-14-1 MODEL EY14
FI
Blower
ywheel
(Cooling
Housing
Starting Pulley-
MODEL EY14
ver
-6-

Fuel Tank
MODEL EY14
-7 -

4-14-2 MODEL EY18-3
Cover
MODEL EY18-3
-a-

/- Tank
/
MODEL EY18-3
-9-

4-14-3 MODEL EY23
Flywheel
Star
MODEL EY23
7g Cover
- 10 -

/" Tank
Con
Cam Shaft
MODEL EY23
- 11 -

4-14-4 MODEL EY25-2 and EY27-2
MODEL EY25-2 and EY27-2
Cover
- 12 -

I ti
I
I
\Cam Shaft
MODEL EY25-2 and EY27-2
- 13 -

5. INSTALLATION
Thelife, ease of maintenance,frequencyof check andrepair,andoperating cost are greatly
affected by
the way the engine is installed. When installing the engine, therefore, the following
contents must
be studied carefully.
n
5-1 INSTALLING
When installingtheengine, its position,couplingconditionswiththeoperatingmachineand
anchoring or supporting method must be carefully studied.
Especially,whendecidingtheinstallingposition,considerationmust
be given to facilitate its
routinessuch as filingandchecking of gasoline and oil, checkingofsparkplugandbreaker,
maintenance of
air cleaner and oil draining.
5-2 VENTILATION
The engine must be supplied with fresh air for cooling and fuel combustion. When the engine is
to be operated in a cover or in a small room, a propermeansmust be providedforcooling air
re-circulation or ducts and baffle plates for guiding a cooling air, because if the temperaturein
theenginecompartment
is allowed to rise,vaporlock,oildeterioration,increaseof oil
consumption,powerreduction,seizure, loss of enginelife or othertroubles are caused,and
proper operation is harmed.Thetemperature of theenginecompartmentmust be maintained
below
50OC even in summer with necessary ventilation arrangement.
5-3 EXHAUST GAS EVACUATION
Since the exhaust gas from the engine is toxic, when the engine is operated indoors, the exhaust
gas must be evacuated to outside.Sincetheoutputpower of anengine is considerably
influenced
by the length of the exhaustduct,itsdiametermust be increasedinproportion to its F-,
length.
5-4 FUEL SYSTEM
When the standard fuel tank is installed separate from the engine, it must be so located that its
bottom surface lies within the height of 5 CL 50 cm from the fuel joint of the carburetor.
When
the fueltankisinstalledtoolow,fuelisnotfedproperlyand if itispositioned too high,
the carburetor overflow is caused.
When connecting the fuelpipe, to eliminateairlockandvapor lock, the pipingmust be
carefullyexaminedforheatconductivity,diameter,bending,and leakage throughfittings.The
standard I.D. of the fuel pipe is 4 ‘L 5 mm.
5-5 POWER TRANSMISSION to DRIVEN MACHINES
5-5-1 BELT DRIVE
Take the following notes into condition:-
o V-belts are preferred to flat belts.
o The driving shaft of the engine and the driven shaft of the driven machine must be parallel.
o The drivingpulleyof the engineand the drivenpulley of the drivenmachinemustbealigned
o The driving pulley must be mounted as near the engine as possible.
o As far as possible, the belt is spanned horizontally.
o When starting the engine, the load must be disconnected from the engine.
o If a clutch is not available, a tension pulley or other means must be employed.
correctly.
- 14 -

5-5-2 FLEXIBLECOUPLING
When
a flexible coupling is used, the runout and mis-alignment between the driven shaft and the
engine driving shaft must be made as small as possible.
The tolerances on the runout and mis-alignment are specified by each coupling maker.
5-6 WIRING
5-6-1 START by RECOIL STARTER, or byROPE
The wiring is indicatedin the wiringdiagramgivenbelow.Normally, the portionsindicatedby
dotted line are not wired in the engine at the factory.
1) Pointsystem
MODEL EY14
MODEL EY18-3
~ Stoo Button
Lighting
Switch Lamp (6V-8V
\ 'Ignition Coil
Lighting
Coil (Optional Equipment, available
SparkPlug
Contact Breaker
la" "-7
',15W)
if required)
' Lighting Coil (Optional Equipment,available if
MODELEY25-2,EY27-2 ,Condenser
required)
ir .ed )
Fig. 5-6- 7
- 15 -

2) Electronic ignition system
MODEL EY14: CDI (Capacitor Discharge Ignition) system
Stop Button BlackMlhite
Pulser Coil
""".J
Optional Lamp Coil
Fig. 58-2
MODEL EY23 STD: TIC (Transistor Ignition Circuit) system
IgnitionCoilConnector
i
Spark Plug
"
Stop Button
L
m7
Fig. 5-6-3
- 16 -