Robin America EY44-2 User manual

ROBIN AMERICA, INC.
ROBIN
TO WISCONSIN ROBIN
ENGINE MODEL CROSS REFERENCE LIST
ROBIN
EY 08
EY15
EY15V
EY20
EY20V
EY23
EY28
EY35
EY40
EY45V
EY2 1
EY44
EY18-3
EY25
EY27
EH11
EH12
EH15
EH17
EH21
EH25
EH3 0
EH30V
EH34
EH34V
EH43V
EC13V
DY 23
DY27
DY30
DY35
DY4 1
WISCONSIN ROBIN
SIDE VALVE
W 1-080
WI-145
W1-145V
W1-185
W1-185V
W1-230
W1-280
Wl-340
W1-390
W 1 -450V
EY21W
EY44W
EY 18-3W
EY25W
EY27W
v
WO1-115
wo1-120
WO1-150
WO1-170
wo1-210
WO1-250
WO 1 -300
WOI-3oov
WO1-340
WO1-340V
WO1-43OV
TWO CYCLE
WT1-125V
DIESEL
WRD 1-230
WRD 1-270
WRD1-300
WRD1-350
WRD1-410

CONTENTS
Section Title Page
1 . SPECIFICATIONS ............................................ 1
2 . PERFORMANCE ............................................ 2
2.1
. Maximumoutput ....................................... 2
2.2
. ContinuousRated Output ................................. 2
2.3 . MaximumTorque and Fuel ConsumptionRatio at Max . Output ........ 2
3 . FEATURES ............................................... 3
4 . GENERALDESCRIPTION of ENGINECONSTRUCTION ............... 4
4.1
.
4.2 .
4.3 .
4.4 .
4.5 .
4.6 .
4.7 .
4.8 .
4.9 .
4.10 .
4.11 .
4.12 .
4-1 3 .
4- 14 .
4.15 .
4- 1 6 .
Sectional View of Engine .................................. 4
Crankcase ........................................... 6
MainBearingCover ..................................... 6
Crankshaft ........................................... 6
ConnectingRod and Piston ................................ 6
Camshaft ........................................... 6
Cylinder and Cylinder Head ............................... 6
ValveArrangement ..................................... 6
Balancer ............................................. 6
Governor ............................................. 7
Cooling ............................................. 7
Lubrication ........................................... 7
Ignition ............................................. 7
Carburetor ........................................... 7
Air Cleaner ........................................... 7
Selenium Rectifier ...................................... 7
5.lNSTALLATlON ............................................ 8
5.1 . Mounting ............................................ 8
5.2 . Ventilation ........................................... 8
5.3. Exhaust Gas Evacuation .................................. 8
5.4
. FuelSystem .......................................... 8
5.5 . PowerTransmission to DrivenMachines ....................... 8
5.6 . Wiring .............................................. 9
6 . DISASSEMBLY and REASSEMBLY .............................. 10
81 . PreparationsandSuggestions ............................... 10
6-2 . SpecialTools ......................................... 10
6-3 . DisassemblyandReassemblyProcedures ....................... 11

7 . MAGNETO ............................................... 18
7.1
. Magneto ............................................. 18
7.2
. Breaker PointAdjustment ................................. 18
7.3
. TimingAdjustment ..................................... 18
7.4
. MagnetoService Instructions ............................... 19
8 . GOVERNOR ADJUSTMENT ................................... 21
9.CARBURETOR ............................................. 22
9.1 . Operationand Construction ................................ 22
9.2 . DisassemblyandReassembly ................................. 23
9.3 . Adjustment .......................................... 23
10 . RUN-INOPERATION OF ENGINE after REASSEMBLY ............... 25
11 . TROUBLESHOOTING ....................................... 26
11.1 . StartingDifficultes ...................................... 26
11.2 . EngineMisses ......................................... 27
11.3
. EngineStops .......................................... 27
11.4 . EngineOverheats ...................................... 27
11.5 . EngineKnocks ........................................ 28
11
.6 . EngineBackfiresThroughCarburetor ......................... 28
12 . CHECKS and CORRECTIONS .................................. 29
13 . MAINTENANCE and STORING ................................. 35
13.1
. Daily ChecksandMaintenance .............................. 35
13.2
. Every20HoursChecksandMaintenance ....................... 35
13.4
. Every 100-200 Hours (Monthly)ChecksandMaintenance ........... 35
13.5
. Every 500-600 Hours(Semianual)ChecksandMaintenance .......... 36
13.6 . Every1000Hours (Yearly)ChecksandMaintenance ............... 36
13.7 . Preparation for LongAbeyance ............................. 36
13.3 . Every 50 Hours (10days)ChecksandMaintenance ................ 35

1.
SPEC1
FICATIONS
-1-

2. PERFORMANCE
2-1MAXIMUMOUTPUT
The maximum output of an engineis such standard power as developed by that engine, after its initial run-in period witha1
themovingpartsproperlyworn-in,whenoperatingwiththefullyopenthrottle valve. Therefore,itfollowsthat
a nev
enginemaynotdevelopthismaximumoutputinthebeginning,becausemovingpartsarenot in aproperly
w0rn-h
condition.
2-2 CONTINUOUSRATEDOUTPUT
The continuous rated output of an engine is suchpowerasdevelopedbythatenginewhenrunningatanoptimum speec
most favorable from the point
of view of engine life and fuel consumption ratio. Therefore, it follows that when designing i
driving systemforanymechanism,withamodel EY33-2 or EY44-2 engine, as a primemover,thecontinuouspowe
requirement
of that mechanism must be kept below the continuous rated output specified.
2-3MAXIMUMTORQUEANDFUEL CONSUMPTION RATIOATMAX.OUTPUT
The maximum torque of an engine is that driving torque of the driving shaft at which the engine is driving an external load
while the engine is developing its max. output. The fuel consumption ratio at max. output
is that fuel consumption ratio o
an engine while that engineis running at the max. output.
PERFORMANCECURVE
Model EY33-2
I
( )for B type
RECOMMENDED OPERATING SPEED RANG
a
7
HP
5
I
MAX. TORQUE
125112 5
-I
1.7(3.4)
124)12
--
~
1.6(3.2)
ft"b (23J11.5-- I
kg-rn
1.5 (3.0)
320
300
280
g/
2000 2500 30003500
(1OOO) 112501 115001 11750)
rpm -
P.h
-2-

3. FEATURES
1. A compact,lightweight,andhighlydurable4cycleaircooledEYserieswithhighoutput,embodyingingeniousdesign
and advanced machining techniques.
2. Simpleconstruction,goodappearance,pluseasystart-up.
3. Smoothspeedcontrolfunctions of governorguaranteesstableoperationundervariousloadconditionsoverawide
range
of applications.
4. Economicaladvantagewithminimizedfuelconsumption.
5. Since power can be taken in any direction simply by pulling the belt, and the feed and drain oil work can also be done
easily in two directions
of engine, the engineis easily coupled with operating machines.
6. The use of dynamic balancer reduces vibrations to such an extantas in a two-cylinder engine.
PERFORMANCE CURVE
Model EY44-2
( )for B type
RECOMMENDED OPERATINGSPE
11
10
HP 9
0
7
6
(33) 16.5
(32) 16
(31) 15.5
tt-lb
(1000)
2000 2500
(1250)
3000
(1500)
rpm-
3500
(1750)
2.3(4.6)
2.2(4.4)
kg-m
2.1(4.2)
-J-

/-
FLYWHEEL(COOLI~G FAN) I
LIGHTING COIL
\
CRANKCASE
-4 -

SEl
-5-

4-2 CRANKCASE
The crankcase is made of aluminum die-cast and separable ondriving shaft side with main bearing cover assembled.
Provided on blower side are two ballbearings, each supporting the crankshaft and camshaft.
4-3 MAINBEARING COVER
The aluminum die-castmainbearingcover on the drivingshaftsideallowseasyaccess to the engine interior for inspection
simply by removing it. The’fange and boss permit direct coupling of operating machines such as generators, pumps, etc.
The oil inlets which
also serve as oil gauges can be mounted ondriving shaft side of Models EY33-2B and EY44-2B.
The force-fit balancer shaft and balancer holder mounting boss assure easy mounting of the balancer mechanism.
44 CRANKSHAFT
The crankshaft is machined from carbon steel forging with an induction hardened crank pin. The breaker cam is provided on
blower side, while crankshaft gear and balancer gear are force-fiton driving side.
4-5 CONNECTING ROD and PISTON
The connecting rod is machined from aluminum alloy forging, and forged alloyitself serves as bearing metal at both ends.
(Model EY44-2 employs aluminum metal on thelarge end.)
An
oil scraper is provided onthe large endforthepurpose ofsplashinglubricatingoil.Thepiston is machinedfron
aluminum alloy casting and provided with grooves for two compression rings, one oil rings, and one skirt ring.
The
EY44-2 piston has an offset structure at the piston pin center so as to reduce striking sound of piston.
4-6 CAMSHAFT
Thecarbonsteelforgingcamshaftincorporatesintegralintakeandexhaustcamsplusaforce-fitcamgear. The B-typ
camshaft
also serves as driving shaft and it is driven at half the crankshaft speed.
4-7 CYLINDER and CYLINDERHEAD
Thecylinder is made of specialcastironandprovidedwithmanyfinsforassuringexcellentcoolingeffects.The cylinda
head is made
of aluminumalloycasting.TheRicardotypecombusionchamberwithasufficientareaassures hil
combusion efficiency. The spark plug
is tilted to facilitate fuel tank mounting.
4-8 VALVEARRANGEMENT
Theexhaust valve is positioned in theupstreamofthecolling air so thatit is intensivelycooled downforimprov
durability
of engine.
4-9 BALANCER
An unbalancedinertiaforceproducedduetocrankshaftandpistonconnectingrodintheverticalandlateraldirection:
balanced bybalancerwhichrotatesat
a ratioof 1: 1 in thedirectionoppositetocrankshaft, so thatvibrationsdue
unbalanced inertia force are reduced.
-6-