Subaru Robin Engines SX17 User manual

2ZZ9990155
SX series
ISSUE EMD-EU6696
PRINTEDINJAPAN
May2009

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-40 -20 0
010 20 30 40 ˚C
-20
-30
-40 -10
20 40 60 80 100˚F
Synthetic 5W-30, 10W-30
5W-30, 10W-30
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US : Please refer to page 4 (2. COMPONENTS).
FR : Please refer to page 4 (2. COMPONENTS).
ES : Please refer to page 4 (2. COMPONENTS).

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AIR INDEX
Descriptive Term Applicable to Emissions Durability Period
Moderate - 50 hours (engine from 0 to 80 cc)
125 hours (engine greater than 80 cc)
Intermediate - 125 hours (engine from 0 to 80 cc)
250 hours (engine greater than 80 cc)
Extended - 300 hours (engine from 0 to 80 cc)
500 hours (engine greater than 80 cc)
WARNING :
The engine exhaust from this product contains
chemicals known to the State of California to
cause cancer, birth defects or other reproductive
harm.
To show compliance with California emission regulations, a hangtag has been provided
displaying the Air Index level and durability period of this engine.
The Air Index level defines how clean an engine’s exhaust is over a period of time. A bar
graph scaled from “0” (most clean) to “10” (least clean) is used to show an engine’s Air Index
level. A lower Air Index level represents cleaner exhaust from an engine.
The period of time (in hours) that the Air Index level is measured is known as the durability
period. Depending on the size of the engine, a selection of time periods can be used to
measure the Air Index level (see below).
Notice : This hangtag must remain on this engine or piece of equipment, and only be
removed by the ultimate purchaser before operation.
Notice : FEDERAL EMISSION COMPONENT DEFECT WARRANTY and CALIFORNIA EMISSION CONTROL
WARRANTY are applicable to only those engines/ generators complied with EPA (Environmental
Protection Agency) and CARB (California Air Resources Board) emission regulations in the U.S.A.
Notice : To the engines/generators exported to and used in the countries other than the U.S.A., warranty service
shall be performed by the distributor in each country in
accordance with the standard Robin engine/generator
warranty policy as applicable.
(California Proposition 65)
(California only)
WA2626

WS6703
FEDERAL EMISSIONS COMPONENT DEFECT WARRANTY
EMISSIONS COMPONENT DEFECT WARRANTY COVERAGE – This emission warranty is applicable in all States, except the state
of California.
Fuji Heavy Industries Ltd. and Robin America Inc., 905 Telser Road, Lake Zurich, Illinois 60047, (herein “ROBIN AMERICA”)
warrant(s) to the initial retail purchaser and each subsequent owner, that this Nonroad engine (herein “engine”) has
been designed, built, and equipped to conform at the time of initial sale to all applicable regulations of the U.S.
Environmental Protection Agency (EPA), and that the engine is free of defects in materials and workmanship which would cause this
engine to fail to conform with EPA regulations during its warranty period.
For the components listed under PARTS COVERED, the service dealer authorized by ROBIN AMERICA will, at no cost to you, make
the necessary diagnosis, repair, or replacement necessary to ensure that the engine complies with applicable U.S. EPA regulations.
EMISSION COMPONENT DEFECT WARRANTY PERIOD
The warranty period for this engine begins on the date of sale
to the initial purchaser and continues for a period of two years.
PARTS COVERED
Listed below are the parts covered by the Emission Components
Defect Warranty. Some of the parts listed below may require
scheduled maintenance and are warranted up to the rst
scheduled replacement point for that part.
EXHAUST EMISSIONS
(1) Fuel Metering System
(i) Carburetor and internal parts (and/or pressure regulator or
fuel injection system).
(ii) Air/fuel ratio feedback and control system, if applicable.
(iii) Cold start enrichment system, if applicable.
(iv) Regulator assy (gaseous fuel, if applicable)
(2) Air Induction System
(i) Intake manifold, if applicable
(ii) Air lter.
(3) Ignition System
(i) Spark plugs.
(ii) Magneto or electronic ignition system.
(iii) Spark advance/retard system, if applicable.
(4) Exhaust manifold, if applicable
(5) Miscellaneous Items Used in Above Systems
(i) Electronic controls, if applicable
(ii) Hoses, belts, connectors, and assemblies.
(iii) Filter lock assy (gaseous fuel, if applicable)
*EVAPORATIVE EMISSIONS
(1) Fuel Line
(2) Fuel Line Fittings
(3) Clamps
*Fuji is not liable for the warranty on these parts if these parts are
installed on the engine by the equipment manufacture. Please
refer to the equipment manufactures warranty.
OBTAINING WARRANTY SERVICE
To obtain warranty service, take your engine to the nearest
authorized Robin America service dealer . Bring your sales
receipts indicating date of purchase for this engine. The
service dealer authorized by ROBIN AMERICA will perform the
necessary repairs or adjustments within a reasonable amount of
time and furnish you with a copy of the repair order. All parts and
accessories replaced under this warranty become the property
of ROBIN AMERICA.
WHAT IS NOT COVERED
*Conditions resulting from tampering, misuse, improper
adjustment (unless they were made by the service dealer
authorized by ROBIN AMERICA during a warranty repair),
alteration, accident, failure to use the recommended fuel and oil,
or not performing required maintenance services.
*The replacement parts used for required maintenance services.
*Consequential damages such as loss of time, inconvenience,
loss of use of the engine or equipment, etc.
*Diagnosis and inspection charges that do not result in warranty-
eligible service being performed.
*Any non-authorized replacement part, or malfunction of
authorized parts due to use of non-authorized parts.
OWNER’S WARRANTY RESPONSIBILITIES
As the engine owner, you are responsible for the performance
of the required maintenance listed in your owner’s manual.
ROBIN AMERICA recommends that you retain all receipts
covering maintenance on your engine, but ROBIN AMERICA
cannot deny warranty solely for the lack of receipts or for your
failure to ensure the performance of all scheduled maintenance.
As the engine owner, you should however be aware that
ROBIN AMERICA may deny warranty coverage if your
engine or a part has failed due to abuse, neglect, improper
maintenance or unapproved modications.
You are responsible for presenting your engine to the nearest
service dealer authorized by ROBIN AMERICA when a problem
exists.
If you have any questions regarding your warranty rights and
responsibilities, you should contact the Robin America customer
service department at 1-800-277-6246 (E-mail address :
[e-mail]) for the information.
THINGS YOU SHOULD KNOW ABOUT THE EMISSION
CONTROL SYSTEM WARRANTY MAINTENANCE AND
REPAIRS
You are responsible for the proper maintenance of the engine.
You should keep all receipts and maintenance records covering the
performance of regular maintenance in the event questions arise.
These receipts and maintenance records should be transferred
to each subsequent owner of the engine. ROBIN AMERICA
reserves the right to deny warranty coverage if the engine has
not been properly maintained. Warranty claims will not be denied,
however, solely because of the lack of required maintenance or
failure to keep maintenance records.
MAINTENANCE, REPLACEMENT OR REPAIR OF EMISSION
CONTROL DEVICES AND SYSTEMS MAY BE PERFORMED BY
ANY REPAIR ESTABLISHMENT OR INDIVIDUAL;
HOWEVER, WARRANTY REPAIRS MUST BE PERFORMED
BY A SERVICE DEALER AUTHORIZED BY ROBIN AMERICA.
THE USE OF PARTS THAT ARE NOT EQUIVALENT IN
PERFORMANCE AND DURABILITY TO AUTHORIZED PARTS
MAY IMPAIR THE EFFECTIVENESS OF THE EMISSION
CONTROL SYSTEM AND MAY HAVE A BEARING ON
THE OUTCOME OF A WARRANTY CLAIM.
If other than the parts authorized by ROBIN AMERICA are used
for maintenance replacements or for the repair of components
affecting emission control, you should assure yourself that such
parts are warranted by their manufacturer to be equivalent to the
parts authorized by ROBIN AMERICA in their performance and
durability.
HOW TO MAKE A CLAIM
All repair qualifying under this limited warranty must be performed
by a service dealer authorized by ROBIN AMERICA. In the event
that any emission-related part is found to be defective during the
warranty period, you shall notify Robin America customer service
department at 1-800-277-6246 (E-mail address : Website.
[e-mail]) and you will be advised of the
appropriate warranty service dealer or service providers where
the warranty repair can be performed.

CALIFORNIA EMISSIONS CONTROL WARRANTY STATEMENT
YOUR WARRANTY RIGHTS AND OBLIGATIONS
The California Air Resources Board and Fuji Heavy Industries Ltd. (herein “FUJI”) are pleased to explain the emissions control system
warranty on your small off-road engine (SORE). In California, new SOREs must be designed, built and equipped to meet the State’s
stringent anti-smog standards. FUJI must warrant the emissions control system on your SOREs for the periods of time listed below
provided there has been no abuse, neglect or improper maintenance of your SOREs.
Your emissions control system may include parts such as the carburetor, fuel-injection system, the ignition system, catalytic converter,
fuel tanks, fuel lines, fuel caps, valves, canisters, lters, vapor hoses, clamps, connectors, and other associated emission-related
components.
Where a warrantable condition exist, FUJI will repair your small off-road engine at no cost to you including diagnosis, parts and labor.
MANUFACTURER’S WARRANTY COVERAGE:
This emissions control system is warranted for two years. If any emissions-related part on your engine is defective, the part will be
repaired or replaced by FUJI.
OWNER’S WARRANTY RESPONSIBILITIES:
-As the SORE owner, you are responsible for performance of the required maintenance listed in your owner’s manual. FUJI
recommends that you retain all receipts covering maintenance on your SORE , but FUJI cannot deny warranty solely for the
lack of receipts.
-As the SORE owner, you should however be aware that FUJI may deny you warranty coverage if your SORE or a part has
failed due to abuse, neglect, or improper maintenance or unapproved modications.
-You are responsible for presenting your SORE to distribution center or service center authorized by ROBIN AMERICA Inc. 905
Telser Road, Lake Zurich, IL 60047 (herein ROBIN AMERICA) as soon as the problem exists. The warranty repairs should be
completed in a reasonable amount of time, not to exceed 30 days.
If you have a question regarding your warranty coverage, you should contact the Robin America Inc. Customer Service Department
at 1-800-277-6246.
GENERAL EMISSIONS WARRANTY COVERAGE
- California Only -
FUJI warrants to the ultimate purchaser and each subsequent purchaser that the SORE (1) has been designed, built and equipped so as
to conform with all applicable regulations; and (2) is free from defects in materials and workmanship that cause the failure of a warranted
part to conform with those regulations as may be applicable to the terms and conditions stated below.
(a) The warranty period begins on the date the engine is delivered to an ultimate purchaser or rst placed into service.
The warranty period is two years.
(b) Subject to certain conditions and exclusions as stated below, the warranty on emissions related parts is as follows:
(1) Any warranted part that is not scheduled for replacement as required maintenance in your owner’s manual is warranted for the
warranty period stated above. If the part fails during the period of warranty coverage, the part will be repaired or replaced by FUJI
according to subsection (4) below. Any such part repaired or replaced under warranty will be warranted for the remainder of the
period.
(2) Any warranted part that is scheduled only for regular inspection in your owner’s manual is warranted for the warranty period stated
above. Any such part repaired or replaced under warranty will be warranted for the remaining warranty period.
(3) Any warranted part that is scheduled for replacement as required maintenance in your owner’s manual is warranted for the period
of time before the rst scheduled replacement date for that part. If the part fails before the rst scheduled replacement, the part
will be repaired or replaced by FUJI according to subsection (4) below. Any such part repaired or replaced under warranty will be
warranted for the remainder of the period prior to the rst scheduled replacement point for the part.
(4) Repair or replacement of any warranted part under the warranty provisions herein must be performed at a warranty station at no
charge to the owner.
(5) Notwithstanding the provisions herein, warranty services or repair will be provided at all of our distribution centers that are
franchised to service the subject engines.
(6) The owner must not be charged for diagnostic labor that leads to the determination that a warranted part is in fact defective,
provided that such diagnostic work is performed at a warranty station.
(7) FUJI is liable for damages to other engine components proximately caused by a failure under warranty of any warranted part.
(8) Throughout the engine warranty period stated above, FUJI will maintain a supply of warranted parts sufcient to meet the expected
demand for such parts.
(9) Any replacement part may be used in the performance of any warranty maintenance or repairs and must be provided without
charge to the owner. Such use will not reduce the warranty obligations of FUJI.
(10) Add-on or modied parts that are not exempted by the Air Resources Board may not be used. The use of any non-exempted add-
on or modied parts by the ultimate purchaser will be grounds for disallowing a warranty claims. FUJI will not be liable to warrant
failures of warranted parts caused by the use of a non-exempted add-on or modied part.

(c) WARRANTED PARTS:
The repair or replacement of any warranted part otherwise eligible for warranty coverage may be excluded from such warranty
coverage if FUJI demonstrates that the engine has been abused, neglected, or improperly maintained, and that such abuse , neglect
,or improper maintenance was the direct cause of the need for repair or replacement of the part. That notwithstanding, any adjustment
of a component that has a factory installed, and properly operating, adjustment limiting device is still eligible for warranty coverage. The
following emissions warranty parts list are covered.
EXHAUST EMISSIONS
(1) Fuel Metering System
(A) Carburetor and internal parts.
(2) Air Induction System
(A) Air lter.
(3) Ignition System
(A) Spark plugs.
(B) Magneto or electronic ignition system.
NOTE: This list based upon the items found in Title 13 Section 2405(d) for exhaust emissions.
WS6647

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ENGLISHFRANÇAISEESPAÑOL
FOREWORD
CONTENTS
Thank you very much for purchasing a ROBIN ENGINE.
Your ROBIN ENGINE can supply the power to operate various sorts of machines and equipment.
Please take a moment to familiarize yourself with the proper operation and maintenance
procedures in order to maximize the safe and efcient use of this product.
Keep this owner’s manual at hand, so that you can refer to it at any time.
Due to constant efforts to improve our products, certain procedures and specications are
subject to change without notice.
When ordering spare parts, always give us the MODEL, PRODUCTION NUMBER and SERIAL
NUMBER of your engine.
Please ll in the following blanks after checking the production number on your engine.
(Location of label is different depending on the engine specication.)
NOTE Please refer to the illustrations on the back page of the front
cover or back cover for Fig.1to 8indicated in the sentence.
PROD No. SER No.
SER No.
(Stamping)
PROD No. / SER No.
(Label)
1.SAFETYPRECAUTIONS...............................................2
2.COMPONENTS.......................................................4
3.PRE-OPERATIONCHECKS.............................................5
4. ELECTRIC STARTER MODELS ..............................................5
5. BELT PULLEY INSTALLATION ONTO KEYWAY-TYPE CRANKSHAFT ............6
6. OPERATING YOUR ENGINE ..............................................7
7.MAINTENANCE ......................................................8
8. PREPARATIONS FOR STORAGE ...............................................9
9.EASYTROUBLESHOOTING...........................................10
10.SPECIFICATIONS...................................................11
Page

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ENGLISHFRANÇAISEESPAÑOL
1. SAFETY PRECAUTIONS
Please make sure you review each precaution carefully.
Pay special attention to statement preceded by the following words.
WARNING
CAUTION
“WARNING” indicates a strong possibility of severe personal injury or loss of life if
instructions are not followed.
“CAUTION” indicates a possibility of personal injury or equipment damage if
instructions are not followed.
WARNING
: EXHAUST PRECAUTIONS
■Never inhale exhaust gasses.
They contain carbon monoxide, a colorless, odorless and extremely dangerous gas
which can cause unconsciousness or death.
■Never operate the engine indoors or in a poorly ventilated area, such as a garage or
carport, etc.
■Exercise extreme care when operating the engine near people or animals.
■Keep the exhaust pipe free of foreign objects.
WARNING
: REFUELING PRECAUTIONS
■Gasoline is extremely ammable and its vapors can explode if ignited.
■Do not refuel indoors or in a poorly ventilated area.
■Be sure to stop the engine prior to refueling.
■Do not remove fuel tank cap nor ll fuel tank while engine is hot or running.
Allow engine to cool at least 2 minutes before refueling.
■Do not overll the fuel tank.
■If fuel is spilt, wipe it away carefully and wait until the fuel has dried before starting the
engine.
■After refueling, make sure that the fuel cap is secured to prevent spillage.
WARNING
: FIRE PREVENTION
■Do not operate the engine while smoking or near an open ame.
■Do not use around dry brush, twigs, cloth rags, or other ammable materials.
■Keep cooling air intake (recoil starter area) and mufer side of the engine at least
1 meter (3 feet) away from buildings, obstructions and other burnable objects.
■Keep the engine away from ammables and other hazardous materials (trash, rags,
lubricants, explosives).
■Store away from furnaces, stoves, water heaters or other appliances that have pilot
light or other ignition source because they can ignite gasoline vapors.
WARNING
: OTHER SAFETY PRECAUTIONS
■Place the protective covers over the rotating parts.
If rotating parts such as the drive shaft, pulley, belt, etc. are left exposed, they are
potentially hazardous. To prevent injury, equip them with protective covers or shrouds.
■Be careful of hot parts.
The mufer and other engine parts become very hot while the engine is running or just
after it has stopped. Operate the engine in a safe area and keep children away from
the running engine.
1 m
1 m

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ENGLISHFRANÇAISEESPAÑOL
■Do not touch the spark plug and ignition cable when starting and operating the engine.
■Never make adjustments on the machinery while it is connected to the engine, without
rst removing the ignition cable from the spark plug. Turning the crankshaft by hand
during adjusting or cleaning might start the engine, and cause serious injury to the
operator.
■Operate the engine on a stable, level surface.
If the engine is tilted, fuel spillage may result.
NOTE
Operating the engine at a steep incline may cause seizure due to improper
lubrication even with a maximum oil level.
■Do not transport the engine with fuel in tank or with fuel strainer valve open.
■Do not move the engine while in operation when it has been removed from the
equipment.
■Keep the unit dry (do not operate it in rainy conditions).
WARNING
: BEFORE PERFORMING ADJUSTMENTS OR REPAIRS
■Unplug power supply (only engines equipped with 120V electric start)
CAUTION
: PRE-OPERATION CHECKS
■Carefully check fuel hoses and joints for looseness and fuel leakage. Leaked fuel
creates a potentially dangerous situation.
■Check bolts and nuts for looseness. A loose bolt or nut may cause serious engine
trouble.
■Check the engine oil and rell if necessary.
■Check the fuel level and rell if necessary. Take care not to overll the tank.
■Keep cylinder ns and recoil starter free of dirt, grass and other debris.
■Wear snug tting working clothes when operating the engine.
Loose aprons, towels, belt, etc., may be caught in the engine or drive train, causing a
dangerous situation.
■Do not choke carburetor to stop engine.
■Make sure spark plug, mufer and fuel cap are in place.
■Do not crank engine with spark plug removed.
■If engine oods, set choke to OPEN/RUN position, place throttle in FAST and crank
until engine starts.

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ENGLISHFRANÇAISEESPAÑOL
2. COMPONENTS
(See Fig. 1)
SYMBOLS
NOTE Please refer to the illustrations on the back page of the front
cover or back cover for Fig.1to 8indicated in the sentence.
❶SAFETY KEY (PUSH/PULL)
❷PRIMER
❸FRONT COVER
❹EXHAUST OUTLET
❺MUFFLER COVER
❻FUEL TANK
❼FUEL TANK CAP (FUEL FILLER)
❽STARTER HANDLE
❾RECOIL STARTER
󱢳SPEED CONTROL LEVER
(W/SHUT OFF SWITCH)
󱢴FUEL VALVE
󱢵CHOKE LEVER
󱢶FUEL CUP
󱢷CARBURETOR
󱢸SPARK PLUG
󱢹P.T.O. SHAFT
󱢺OIL GAUGE (OIL FILLER)
󱢻OIL DRAIN PLUG
󱢼ENGINE SERIAL NO. (STAMPING)
󱢽ELECTRIC STARTER
󱢾ENGINE NAME LABEL (SPEC. No.)
󱢿PUSH BUTTON ELECTRIC START
󱣀POWER CORD
󱣁BAFFLE
Add oil
Engine oil
On (Run) Engine start
(Electric start)
Engine stop
Fast
Slow
Fuel shut-off
Fuel system
failure / malfunction
Fuel (gasoline)
Choke
Stay clear of the hot surface.
Stop the engine before refueling.
Check for leakage
from hose and fittings.
Shutt off fuel valve
when the engine is not in use.
HOT, avoid touching the hot area.
Off (Stop)
Read manual.
Exhaust gas is poisonous.
Do not operate in an unventilated
room or enclosed area.
Fire, open flame and smoking
prohibited.
Cold engine
Warm engine
Primer
Push primer
Do not push primer
Run position
Two times
Stop position

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ENGLISHFRANÇAISEESPAÑOL
3. PRE-OPERATION CHECKS
4. ELECTRIC STARTER MODELS
NOTE
Engine shipped from our factory is without oil.
Before starting engine, ll with oil. Do not over-ll.
1. CHECK ENGINE OIL (See Fig. 󱯐)
Before checking or relling engine oil, be sure the engine is
located on stable, level surface and stopped.
■Do not screw the oil gauge into the oil ller neck to check oil
level. If the oil level is low, rell to the upper level with the
following recommended oil.
■Use 4-stroke automotive detergent oil of API service class
SE or higher grade.
■Select the viscosity based on the air temperature at the
time of operation as shown in the table. (See Fig.󱯐-󰴤)
CAUTION
Air cooled engines run hotter than automotive
engines.
The use of non-synthetic multi-viscosity oils
(5W-30, 10W-30, etc.) in temperatures above
40°F(4°C) will result in higher then normal oil
consumption. When using a multi-viscosity oil,
check oil level more frequently.
Oil capacity (Upper level) : Oz (L)
SX17/21....................20.3(0.6)
SX30 ......................33.8(1.0)
2. CHECK FUEL (See Fig. 󱯒)
WARNING
Do not refuel while smoking, near an open ame
or other such potential re hazards. Otherwise
re accident may occur.
NOTE
THIS ENGINE IS CERTIFIED TO OPERATE ON
AUTOMOTIVE UNLEADED GASOLINE.
Fuel tank capacity : Qts (L)
SX17 .......................3.6(3.4)
SX21 .......................3.8(3.6)
SX30 .......................6.4(6.1)
■Stop the engine and open the cap.
■Close the fuel valve before lling the fuel tank.
■Do not ll above the top of the fuel lter screen
(marked 󰿿), or the fuel may overow when it heats up later
and expands.
For electric starter operation, proper electric wiring
arrangements are needed before normal engine operation.
WIRING DIAGRAM
(SX17,21)
Spark plug Black Black
Black
Stop switch (Safety Key)
Ignition coil
Flywheel
Stop switch
(Speed Conrol Lever)
Electric starter
AC120V
Push switch
(Push Button Electric Start)
AC120V
(SX30)
Spark plug Black
Lamp
Lamp coil
Magneto Ignition coil
Black
Blue
Light Blue
Black
Stop switch (Safety Key)
Stop switch
(Speed Conrol Lever)
Electric starter
AC120V
Push switch
(Push Button Electric Start)
AC120V
Optional hardware shown by dotted lines.
■When lling the fuel tank, always use the fuel lter screen.
■After refueling, tighten the fuel cap (rotate clockwise) until
it makes a physical stop, there will be a relief in resistance
just before the physical stop.
This will form a vapor seal between the tank and fuel cap.
■Wipe off any spilled fuel before starting the engine.

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ENGLISHFRANÇAISEESPAÑOL
5. BELT PULLEY INSTALLATION ONTO KEYWAY-TYPE CRANKSHAFT
When installing the belt pulley and/or clutch onto keyway-type
crankshaft (PTO shaft), proper and correct arrangements are needed.
The following illustration shows the correct installation of the applicable
component parts.
Pulley
Bolt
Washer
PTO shaft
Key
■SAE (inch) keyway-type crankshaft
Washer; Use the washer (material; SS41P) with the thickness
described below;
SX17/21 SX30
Washer
Thickness
in. (mm)
0.177 (4.5)
or over
0.248 (6.3)
or over
ROBIN genuine part
Thickness;
in. (mm)
OD;
in. (mm)
ID;
in. (mm)
Material;
020-00801-40,
Washer
0.177 (4.5)
1.100 (28)
0.335 (8.5)
SS41P
(NA)
Bolt; Select the proper bolt and tighten it to the specied
tightening torque, as mentioned below;
SX17/21 SX30
Thread dimensions 5/16 – 24UNF2B 7/16 – 20UNF2B
Effective
thread length
in. (mm)
0.63 to 0.87
(16 to 22)
0.71 to 1.06
(18 to 27)
Strength “8T” or higher
Tightening Torque
ft•lb.(N•m)(kgf•cm)
14.8 - 16.2
(20 - 22)
(204 - 224)
36.9 - 44.3
(50 - 60)
(510 - 612)
(No ROBIN genuine part is available.)
Key Location
When using the belt pulley with the extended boss on both
side as shown in the illustration, put the spacer so that the
key stays in the keyway portion of the crankshaft.
Proper
Improper
Spacer
Key
Key should be within this portion.
Key
Belt Pulley Installation
Install the belt pulley in the no over-hang condition as shown
in the illustration.
Correct
Pulley
Incorrect
Crankshaft (PTO)
Pulley
Crankshaft (PTO)
Large over-hang

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ENGLISHFRANÇAISEESPAÑOL
6. OPERATING YOUR ENGINE
(See Fig. 4 or 5)
Pulley tting onto PTO shoulder
For proper pulley tting onto PTO shoulder, make round
chamfer at pulley corner.
Sharp edge of pulley corner strikes PTO shoulder. In this
improper condition, bolt will be loosened, and PTO damaged
nally.
Pulley
Crankshaft (PTO)
Pulley
Crankshaft (PTO)
Round chamfer for
proper fitting
Sharp edge striking
Proper
Improper
1. STARTING
MANUAL START
(1) Open the fuel valve. (See Fig.󱯔-󰴤)
(2) Insert the safety key. (See Fig.󱯔-󰴥)
(3) Move the choke lever to CHOKE position. (See Fig.󱯔-󰴦)
(4) Depress primer two times. (See Fig.󱯔-󰴧)
CAUTION
■If the engine is already warm, place choke
control in the OFF position instead of CHOKE
position.
■Do not push the primer bulb.
(5) Move throttle to FAST position. (See Fig.󱯔-󰴨)
(6) Pull the starter handle slowly until resistance is felt. This is
the “compression” point. Return the handle to its original
position and pull swiftly. Do not pull out the rope all the way.
After starting the engine, allow the starter handle to return to
its original position while still holding the handle.
(See Fig.󱯔-󰴩)
(7) After starting the engine, gradually open choke by turning
the choke lever and nally keep it fully opened.
Do not fully open the choke lever immediately when the
engine is cold or the ambient temperature is low, because
the engine may stop. (See Fig.󱯔-󰴪)
ELECTRIC START
(1) Open the fuel valve. (See Fig.󱯔-󰴤)
(2) Insert the safety key. (See Fig.󱯔-󰴥)
(3) Move the choke lever to CHOKE position. (See Fig.󱯔-󰴦)
(4) Depress primer two times. (See Fig.󱯔-󰴧)
CAUTION
■If the engine is already warm, place choke
control in the OFF position instead of CHOKE
position.
■Do not push the primer bulb.
(5) Move throttle to FAST position. (See Fig.󱯔-󰴨)
(6) Connect power cord to starter motor, then to wall receptacle.
(See Fig.󱯖-󰴤)
(7) Depress starter button. (See Fig.󱯖-󰴥)
CAUTION
■To prolong starter life, use short starting cycles
(5 seconds maximum, then wait one minute).
WARNING
■Prevent damage to
unit. Know voltage of
your starter and only
use matching outlets.
■Use a 3-wire power
cord.
120V AC
3-WIRE
RECEPTACLE
3-PRONG
GROUNDED PLUG
■Plug Power cord into starter motor rst, then
into wall receptacle.
If additional power cord is required, use a 3-wire
■If the supply cord is damaged, it must be
replaced by the manufacturer or its service
agent or a similarly qualied person in order to
avoid a hazard.
(8) After starting the engine, gradually open choke by turning
the choke lever and nally keep it fully opened.
Do not fully open the choke lever immediately when the
engine is cold or the ambient temperature is low, because
the engine may stop. (See Fig.󱯔-󰴪)
(9) IMPORTANT: Disconnect power cord from wall receptacle,
then starter motor. (See Fig.󱯖-󰴦)
2. STOPPING
(1) Move throttle control to SLOW, then to STOP.
(See Fig.󱯘-󰴤)
(2) Pull out safety key. (See Fig.󱯘-󰴥)
(3) Close fuel valve. (See Fig.󱯘-󰴦)

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ENGLISHFRANÇAISEESPAÑOL
7. MAINTENANCE
(See Fig. 7)
MAINTENANCE, REPLACEMENT, OR REPAIR OF
THE EMISSION CONTROL DEVICES AND SYSTEMS
MAY BE PERFORMED BY ANY NONROAD ENGINE
REPAIR ESTABLISHMENT OR INDIVIDAL.
1. DAILY INSPECTION (See Fig. 7-①)
Before running the engine, check the following service items.
󰿿Loose or broken bolts and nuts
󱀀Enough clean engine oil
󱀁Leakage of gasoline and engine oil
󱀂Enough gasoline
󱀃Safe surroundings
󱀄Excessive vibration, noise
2. PERIODIC INSPECTION
Periodic maintenance is vital to the safe and efcient operation
of your engine.
Check the table below for periodic maintenance intervals.
IT IS ALSO NECESSARY FOR THE USER OF THIS ENGINE
TO CONDUCT THE MAINTENANCE AND ADJUSTMENTS ON
THE EMISSION-RELATED PARTS LISTED BELOW TO KEEP
THE EMISSION CONTROL SYSTEM EFFECTIVE.
The emission control system consists of the following parts :
(1) Carburetor and internal parts
(2) Cold start enrichment system, if applicable
(3) Intake manifold, if applicable
(4) Spark plug
(5) Magneto or electronic ignition system
(6) Spark advance/ retard system, if applicable
(7) Exhaust manifold, if applicable.
(8) Hoses, belts, connectors, and assembles
The maintenance schedule indicated in the following table is
based on the normal engine operation.
Should the engine be operated in extremely dusty condition or
in heavier loading condition, the maintenance intervals must be
shortened depending on the contamination of oil, clogging of
lter elements, wear of parts, and so on.
3. INSPECTING THE SPARK PLUG
(See Fig. 7-②,③)
(1) Remove three bolts from bafe to examine a spark plug, and
please remove bafe. (See Fig.󱯚-󰴥)
󰿿SPARK PLUG
󱀀BAFFLE
󱀁BOLT
(2) Clean off carbon deposits on the spark plug electrode using
a plug cleaner or wire brush.
(3) Check electrode gap. The gap should be 0.6 mm to 0.7mm
(0.02 inch.-0.03 inch.). Adjust the gap, if necessary, by
carefully bending the side electrode. (See Fig.󱯚-󰴦)
Recommended Spark Plug :
SX17 . . . .
E4RC (TORCH) / BR-4HS (NGK)
SX21/30............... BR-4HS (NGK)
Parts number
E4RC (TORCH)
BR-4HS (NGK)
(NA)
065 - 01407 - 40
Periodic Maintenance Schedule table
Maintenance Items Every 8 hours (Daily) Every 50 hours (Season) Every 100 hours (Season)
Clean engine and check bolts and nuts (Daily)
Check and rell engine oil  (Rell daily up to upper level)
Change engine oil (*Note 1) (Initial 20 hours) 
Clean spark plug 
Clean fuel cup 
Clean and adjust spark plug and electrodes 
Replace spark plug 
*Note 1: Initial oil change should be performed after rst twenty (20) hours of operation. Thereafter change oil every hundred (50) hours.
Before changing oil, check for a suitable way to dispose of old oil. Do not pour it down into sewage drains, onto garden soil or into
open streams. Your local zoning or environmental regulations will give you more detailed instructions on proper disposal.

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ENGLISHFRANÇAISEESPAÑOL
8. PREPARATIONS FOR STORAGE
4. ENGINE OIL CHANGE (See Fig. 7-④,⑤)
Initial oil change : After 20 hours of operation
Thereafter : Every 50 hours of operation
(1) When changing oil, stop the engine and loosen the drain
plug. Drain the used oil while the engine is warm. Warm oil
drains quickly and completely.
CAUTION
To prevent injury, pay attention to the hot oil.
(2) Re-install the drain plug before relling oil.
Oil capacity (Upper level) : Oz (L)
SX17/21....................20.3(0.6)
SX30 ......................33.8(1.0)
(3) Refer to page 5 for the recommended oil.
■Always use the best grade and clean oil. Contaminated oil,
poor quality oil and shortage of oil cause damage to engine
or shorten the engine life.
5. CLEANING FUEL CUP (See Fig. 7-⑥,⑦)
WARNING Flame Prohibited
(1) To examine a fuel cap, remove three or four bolts from bafe
and remove bafe. Then, please remove speed control lever
knob, two bolts and two nuts from Front cover and remove
Front cover. (See Fig.󱯚-󰴩)
󰿿BAFFLE
󱀀FRONT COVER
󱀁SPEED CONTROL LEVER KNOB
(2) Inspect fuel cup for water and dirt. (See Fig.󱯚-󰴪-󰿿)
(3) To remove water and dirt, close the fuel valve and remove
the fuel cup.
(4) After removing dirt and water, wash the fuel cup with
kerosene or gasoline. Reinstall securely to prevent leakage.
1. DISCHARGE FUEL (See Fig. 8-①)
WARNING Flame Prohibited
If you do not use the engine more than 1 month, discharge fuel
to prevent gum in the fuel system and carburetor parts.
■Remove the fuel cup, place it over a container and open the
fuel valve to discharge fuel from the fuel tank.
■Remove the drain screw of the carburetor oat chamber
and discharge fuel.
2. ENGINE OIL
■Change the engine oil with fresh oil.
■Remove the spark plug, pour about 0.2 Oz (5 cc) of engine
oil into the cylinder, slowly pull the starter handle of the
recoil starter 2 or 3 times, and reinstall the spark plug.
3. CLEAN AND STORE
■Slowly pull the recoil starter handle until resistance is felt
and leave it in that position.
■Clean the engine thoroughly with an oiled cloth, put the
cover on, and store the engine indoors in a well ventilated,
low humidity area.
6. HIGH ALTITUDE ENGINE OPERATION
■Please have an authorized Robin America service dealer
modify this engine if it is to be run continuously above 5000
feet (1500 meters). Failure to do so, may result in poor
engine performance, spark plug fouling, hard starting, and
increased emissions.
■Carburetor modication by an authorized Robin America
service dealer will improve performance and allow that this
engine meets EPA (Environmental Protection Agency) and
California ARB (Air Resources Board) emission standards
throughout its useful life.
■An engine converted for high altitudes can not be run at
5000 feet or lower. In doing so, the engine will overheat and
cause serious engine damage.
Please have an authorized Robin America service dealer
restore high altitude modied engines to the original factory
specication before operating below 5000 feet.

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ENGLISHFRANÇAISEESPAÑOL
9. EASY TROUBLESHOOTING
WHEN ENGINE WILL NOT START :
Perform the following checks before you take the engine to
your Robin America service dealer. If you still have trouble after
completing the checks, take the engine to your nearest Robin
America service dealer.
1. Is there a strong spark across the
electrode ?
(1) Is the stop switch at position “ I ” (ON)?
(2) Remove and inspect the spark plug.
If the electrode is fouled, clean or replace it with new one.
(3) Remove the spark plug and connect it to the plug cap. Pull
the starter handle while grounding spark plug against engine
body. Try with a new spark plug if the spark is weak or there
is no spark.
The ignition system is faulty if there is no spark with a new
spark plug.
WARNING
■Wipe out spilled fuel carefully before testing.
Place spark plug as far away from spark plug
hole as possible.
■Do not hold spark plug by hand while pulling
recoil starter.
2. Is there enough compression?
Pull the starter handle slowly and check if resistance is felt.
If little force is required to pull the starter handle, check if the
spark plug is tightened rmly.
If the spark plug is loose, tighten it.
3. Is the spark plug wet with gasoline?
(1) Is the fuel valve opened?
(2) Choke (close choke lever) and pull the starter handle ve or
six times. Remove the plug and check if its electrode is wet.
If the electrode is wet, fuel is well supplied to your engine.
(3) When the electrode is dry, check where the fuel stops.
(Check the fuel intake of the carburetor.)
(4) In case the engine does not start with well supplied fuel, try
using fresh fuel.

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ENGLISHFRANÇAISEESPAÑOL
10. SPECIFICATIONS
MODEL SX17 SX21 SX30
Type Air-cooled, 4-cycle single cylinder, overhead camshaft, gasoline engine
Displacement Cu.In (mL (cc)) 10.3 (169) 12.9 (211) 17.5 (287)
Direction of Rotation Counterclockwise, as Viewed from P.T.O. Shaft side
Lubricant Automotive detergent oil (API/ SE or higher grade, SAE/ 5W-30 or 10W-30.)
Oil Capacity Oz (L) 20.3 (0.6) 33.8 (1.0)
Fuel Automotive Gasoline (Unleaded)
Fuel Tank Capacity Qts (L) 3.6 (3.4) 3.8 (3.6) 6.4 (6.1)
Spark Plug E4RC (TORCH) or
BR-4HS (NGK) BR-4HS (NGK)
Starting System Recoil starter / AC 120V Electric starter
Dry Weight lb (kg) 34.2 (15.5) 44.1 (20) 68.3 (31)
Dimensions
(L x W x H) in. (mm)
12.4 ×16.7 ×15
(316 ×424 ×380)
12.8 ×17 ×15
(324 ×433 ×380)
15.1 ×19.1 ×17.8
(384 ×484 ×453)
Valve Clearance 0.0047 +0.0012
0in. ( 0.12 +0.03 0mm )
(Intake and Exhaust) Note : Adjust the valve clearance while the engine is cold.
Emissions Durability Period
(California only) 250 hours 500 hours