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Honda GX270 - page 1
31ZK6601 00X31-ZK6-6010 2003 Honda Motor Co., Ltd. -All Rights Reserved K1:GX390 300.2003.10 Printed in Japan Owner’ s Manual GX270 ・ GX390 LPG-Fueled Engine Black DIC 157 AH HC 英 N EM3 GX270 AH O/M 31ZK6601 GX270 AH O/M 31ZK6601 ...
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Honda GX270 - page 2
Keep this owner’s manual handy, so you ca n refer to it at any time. This owner’s manual is considered a permanent part of the engine and should remain with the engine if resold. The information and specifi cations included in this pub lication were in effect at the time of approval for p rinting. Illustrations are ba sed on the GX270 LPG. Hond ...
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Honda GX270 - page 3
1 INTRODUCT ION Congratulations on your selection of a Honda engine. We are cer tain you will be pleased with your purchase of one of the finest engines on the market. We want to he lp you get t he best res ults from y our new engine a nd to operate it safely. This manual contains the information on how to do that; please read it carefully. As you ...
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Honda GX270 - page 4
2 INTRODUCTION A FEW WORDS ABOUT SAFETY Safety Labels Safety Messages Safety Headings Safety Section Instructio ns Your safety and the safety of others are ve ry important. And using this engine safely is an important responsibility. To help you make informed decisions about safety, we have provided operating procedures and other information on lab ...
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Honda GX270 - page 5
3 CON TENTS ....................................................................................... ENGINE SAFETY . 5 ................................................ IMPORTANT SAFETY INFORMATION . 5 ........................................................................ CONTROLS & FEATURES . 7 ............................................ COMP ...
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Honda GX270 - page 6
4 CONTENTS ......................................................... HELPFUL TIPS & SUGGESTIONS . 33 ................................................................... STORING YOUR ENGINE . 33 ........................................................................ Storage Preparation . 33 ...................................................... ...
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Honda GX270 - page 7
5 ENGINE SAFE TY IMPORTANT SAFETY INFORMATION Owner Responsibilities Refuel With Care Hot Exhaust Most accidents with engines can be prevented if you follow all instructions in this manual and on the engine. Some of the most common hazards are discussed below, along with the best way to protect yourself and others. Honda engines are designed to giv ...
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Honda GX270 - page 8
6 ENGINE SAFETY Other Equipment Carbon Monoxide Hazard Review the instructions provided with the equipment powered by this engine for any additional safety precautions that should be observed in conjunction with engin e startup, shutdown, or operation, or protective apparel that m ay be needed to operate the equipment. Exhaust gas contains poisonou ...
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Honda GX270 - page 9
7 COMPONENT & CONTROL LOCATIONS CONTROLS & FEA TURES MUFFLER AIR CLEA NER THROTTL E LEVER RECOIL STA RTER SPARK P LUG OIL DR AIN PLU G ENGINE SWITCH CHOK E LEVER OIL FILLER CAP START ER GRIP 01/11/15 10:57:19 31ZK6600_008 ...
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Honda GX270 - page 10
8 CONTROLS & FEATURES CONTROLS Engine Switch ENGINE SWITCH OFF ON The engine switch enables and disables the ignition system. The engine switch must be in the ON position for the engine to run. Turning the engine switch to the OFF position stops the engine. 01/11/15 10:57:27 31ZK6600_009 ...
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Honda GX270 - page 11
9 CONTROLS & FEATURES Choke Lever CHOK E LEVER O O P P E E N N C C L L O O S S E E D D The choke lever opens and closes the choke valve in the carburetor. Some engine applications use a remotely-mounted choke control rather than the engine-mounted choke lever shown her e. The CLOSED position create s a vacuum to help the LPG to f low into the e ...
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Honda GX270 - page 12
10 CONTROLS & FEATURES Throttle Lever Recoil Starte r Grip THROTTL E LEVER SLOW F F A A S S T T START ER GRIP The throttle lever controls engine speed. Moving the throttle lever in the dir ections shown makes the engine r u nf a s t e ro rs l o w e r . Some engine applications use a remotely-mounted throttle control rather than the engine-mount ...
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Honda GX270 - page 13
11 CONTROLS & FEATURES FEATURES Oil Alert System (applicable engine types) If the engine stops and will not restart, check the engine oil le vel (page ) before troubleshooting in other ar eas. The Oil Alert system is designed to prevent engine damage caused by an insufficient amount of oi l in the crankcase. Before the oil level in the crankcas ...
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Honda GX270 - page 14
12 BEFORE OPERAT ION IS YOUR ENGINE READY TO GO? Check the General Condition of the Engine For your safety, and to maximize the service life of your equipment, it is very important to take a few moments before you operate the engine to check its cond ition. Be sure to take care of a ny problem you find, or have your s ervicing dealer c orrect it, b ...
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Honda GX270 - page 15
13 BEFORE OPERATION Check the Engine Check the Equipment Power ed by This Engine Check the engine oil level (see pag e ). Running the engine with a low oil level can cause engine damage. The Oil Alert system (applicable engine types) will automatically stop the engine bef ore the oil level falls below safe li mits. However, to avoid the inconvenien ...
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Honda GX270 - page 16
14 OPERA TION SAFE OPERATING PRECAUTIONS STARTING THE ENGINE B e f o r eo p e r a t i n gt h ee n g i n ef o rt h ef i r s tt i m e ,p l e a s er e v i e wt h e IMPORTANT SAFETY INFORMATION on page and the chapter titled BEFORE OPERATION . Review the instructions provided with the equipment powered by this engine for any sa fety precautions that sh ...
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Honda GX270 - page 17
15 OPERATION CHOK E LEVER THROTTL E LEVER S S L L O O W W C C L L O O S S E E D D Move the choke lever to the CLOSED position. Always use the choke when starting the engine. Some engine applications use a remotely-mounted choke control rather than the engine-mounted choke lever shown her e. Move the throttle lever away from the SLOW position, about ...
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Honda GX270 - page 18
16 OPERATION ON ENGINE SWITCH START ER GRIP Turn the engine switch to the ON position. Operate the starter. Pull the starter grip lightly u ntil you feel re sistance, then pull briskly. Return the starter grip gently. 4. 5. 01/11/15 10:58:23 31ZK6600_017 ...
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Honda GX270 - page 19
17 OPERATION CHOK E LEVER OPEN Move the choke lever to the OPEN position after the engine has started. 6. 01/11/15 10:58:27 31ZK6600_018 ...
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Honda GX270 - page 20
18 OPERATION STOPPING THE ENGINE THROTTL E LEVER ENGINE SWITCH OFF SLOW To stop the engine in an emergency, simply turn the engine switch to the OFF position. Under normal condi tions, use the foll owing procedure. Move the throttle lever to the SLOW position. Some engine applications use a remotely-mounted throttle control rather than the engine-m ...
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Honda GX270 - page 21
19 OPERATION SETTING ENGINE SPEED THROTTL E LEVER SLOW F F A A S S T T Position the throttle lever for t he desired engine speed. Some engine applications use a remotely-mounted throttle control rather than the engine-mounted throttle lever shown her e. For engine speed recommendations, refer to th e instructions provided with the equipment powered ...
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Honda GX270 - page 22
20 SERVICING YOUR E NGINE THE IMPORTANCE OF MAINTENANCE Maintenance, replacement or r epair of emission control devices and systems may be done by any engine repair establishment or individual, using parts that are ‘‘certified’’ t o EPA standards. Good maintenance is essential for saf e, economical, and trouble-free operation. It will also ...
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Honda GX270 - page 23
− − − 21 SERVICING YOUR ENGINE MAINTENANCE SAFETY Safety Precautions Carbon monoxide poisoning from engine exhaust . Burns from h ot parts. Injury from moving parts. Some of the most important safety precautions follow. However, w e cannot warn you of every conceivable hazard that can ari se in performing maintenance. Only you can decide whet ...
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Honda GX270 - page 24
− − − − − − ＊ − ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○＊ 22 SERVICING YOUR ENGINE MAINTENANCE SCHEDULE For commercial use, log hour s of operation to determine proper maintenance intervals. These items should be serviced by your servicing dealer, unless you have the proper tools and are mechanically profici ...
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Honda GX270 - page 25
23 SERVICING YOUR ENGINE FUEL RECOMMENDATIONS Use LPG with a propane content of 95% or higher. This engine is certified to operate on LPG only. Occasionally you may hear a light ‘‘spark knock’’ o r ‘‘pinging ’’ (metallic rapping noise) while operating under heavy loads. This is no cause for concern. If spark knock or pinging occurs ...
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Honda GX270 - page 26
24 SERVICING YOUR ENGINE ENGINE OIL LEVEL CHECK LOWER LIMIT UPPER LI MIT FILLER CAP /DIP STICK Check the engine oil level with the engine stopped and in a level position. Running the engine with a low oil level can cause engine damage. The Oil Alert system (applicable engine ty pes) will automatically stop the engine before the oil level falls belo ...
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Honda GX270 - page 27
25 SERVICING YOUR ENGINE ENGINE OIL CHANGE FILLER CAP / DIPSTI CK OIL LEVE L DRAIN PL UG Drain the used oil while the engine is warm. Warm oil drains quickly and completely. 1.16 US qt (1.10 ) Running the engine with a low oil level can cause engine damage. The Oil Alert system (applicable engine types) will automatically stop the engine before the ...
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Honda GX270 - page 28
26 SERVICING YOUR ENGINE ENGINE OIL RECOMMENDATIONS Oil is a major factor affecting performance and service life. Use 4-stroke automotive detergent oil that is designed for engines operating on LPG. For operation in temperatur es below 32°F (0°C), 5W-30 synthetic oil may be used for easier starting. Do not use 5W-30 synthetic oil when the air tem ...
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Honda GX270 - page 29
27 SERVICING YOUR ENGINE AIR FILTER INSPECTION PAPER FILTER ELEMENT FOAM FILTER ELEMENT Remove the air cleaner cover and inspect the filter elements. Clean or replace dirty filter elements. A lways replace damaged filter elements. Refer to page for instructions that apply to the air cleaner and filter service. 28 01/11/15 10:59:52 31ZK6600_028 ...
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Honda GX270 - page 30
28 SERVICING YOUR ENGINE AIR CLEANER SERVICE AIR CLEANE R COVER PAPER FILTER ELEMENT FOAM FILTER ELEMENT GASKET WING NUTS A dirty air filter w ill restrict air flow to the c arburetor, reducing engine performance. If you operate the engine in very dusty areas, clean the air filter more often than specified in the MAINTENANCE SCHEDULE. Operating the ...
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Honda GX270 - page 31
29 SERVICING YOUR ENGINE Wipe dirt from the inside of the air cleaner base and cover, using a moist rag. Be caref ul to prevent dirt f rom entering the air duc t that leads to the carburetor. Place the foam air filter element over the paper element, and reinstall the assembled air filter. Be sure the gasket is in place beneath the air filter. Tight ...
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Honda GX270 - page 32
− − − − 30 SERVICING YOUR ENGINE SPARK PLUG SERVICE SPARK P LUG WRENCH 0.028 0.031 in (0.70 0.80 mm ) BPR6ES W20EPR-U An incorrect spark plug can cause engine damage. Disconnect the spark plug cap, and remove any dirt from around the spark plug area. Remove the spark plug with a 13/16-inch spark plug wrench. Inspect the spark plug. Replace ...
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Honda GX270 - page 33
− ＋ − 31 SERVICING YOUR ENGINE IDLE SPEED ADJUSTMENT THROT TLE STOP SCRE W A loose spark plug can overheat and damage t he engine. Overtightening the spark plug can damage the threads in the cylinder head. After the spark plug seats, tighten with a 13/16-inch spark plug wrench to comp ress the washer. If reinstalling the used spa rk plug, tig ...
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Honda GX270 - page 34
32 SERVICING YOUR ENGINE SPARK ARRESTER SERVICE (optional equipment) 5 mm SCREWS 4 mm SCREW 4m m SCREWS 8 mm NUTS MUFFLER SP ARK ARRE STER EXHAUST DEFLE CTOR SPARK ARREST ER MUFFLER PROTEC TOR SCREEN Your engine is not factory-equipped with a spark arrester. In some areas, it is illegal to o perate a n engine without a spark a rrester. Check local ...
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Honda GX270 - page 35
33 HELP FUL TIPS & SUGGE STIONS STORING YOUR ENGINE Storage Pre paration Cleaning Proper storage preparation is essential for keeping your engine troublefree and looking good. The f ollowing steps will help to keep rust and corrosion from impairing your engine’s function and appearance, and will make the engine easier to s tart when you use i ...
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Honda GX270 - page 36
− 34 HELPFUL TIPS & SUGGESTIONS Engine Oil Storage Precautions Engine Cylinder Align not ch on pull ey wit h hole a t top of c over . Select a well-ventilated storage area away from any appliance that operate s with a f lame, suc h as a f urnac e, water hea ter, or clothes dryer. Also avoid any area with a spark-producing electric motor, or w ...
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Honda GX270 - page 37
35 HELPFUL TIPS & SUGGESTIONS Removal From Storage With the engine and exhaust system cool, cover the engine to keep out dust. A hot engine and exhaust system can ig nite or melt some materials. Do not use sheet plas tic as a dust c over. A nonporous c over will trap moisture around the engine, pr omoting rust and corrosion. Position the equipm ...
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Honda GX270 - page 38
36 HELPFUL TIPS & SUGGESTIONS TRANSPORTING If the engine has been running, allow it to cool for at least 15 minutes before loading the engine-powered equipment on the transpor t vehicle. A hot engine and exhau st system can burn you and can ignite some materia ls. Keep the engine level when transporting to reduce the possibility of fuel leakage ...
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Honda GX270 - page 39
37 TAKING CARE OF UNEXPECTED PROBLEMS ENGINE LACKS POWER Possib le Cause Correction ENGINE WILL NOT START Possib le Cause Correction Fuel valve OFF. Choke O PEN. Engine s witch O FF. Out of fuel. Spark plug fau lty, foule d, or imprope rly gapped. Spark plug w et with fuel (floode d engine ). Ca rbur et or mal fun cti on, igniti on malf unction, va ...
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Honda GX270 - page 40
38 TECHNICAL & CONSUMER INFORMATION TECHNICAL INFORMATION Serial Number Location SERIAL NUM BER & ENGINE TYPE Engine serial number: Record the engine serial number in the space below. You will need this serial number w hen ordering parts, and when making technical or warranty inquires (see page ). 47 01/11/15 11:01:20 31ZK6600_039 ...
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Honda GX270 - page 41
39 TECHNICAL & CONSUMER INFORMATION Remote Contro l Linkage RETURN SP RING Flexible wire core mounting Solid wire core mounting WIRE 5m m CIRCLIP THROTTL E LEVE R WIRE HOLDE R 4 mm SCREW OPTIONA L WIR E HOLDER CHOKE LEVER REMOT E CHOKE LINKAGE REMOTE THR OTTLE L INK AGE THROTTL E LEVER FRICTION NUT The throttle and choke control levers are prov ...
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Honda GX270 - page 42
40 TECHNICAL & CONSUMER INFORMATION Carburetor Modificati on for High Altitude Operation Fuel Regulator Information The GX270 and GX390 LPG-fueled engine do not require any modifications for high-altitude operation. However, performance will decrease at high altitudes. This engine is certified to comply with U.S. EPA and California ARB emission ...
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Honda GX270 - page 43
41 TECHNICAL & CONSUMER INFORMATION Emission Control System Inform ation Source of Emissions The U.S. and California Clean Air Acts Tampering and Altering The combustion process produces car bon monoxide, oxides of nitrogen, and hydrocarbons. Control of hydrocarbons and oxides of nitrogen is very important because, under certain conditions, the ...
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Honda GX270 - page 44
42 TECHNICAL & CONSUMER INFORMATION Problems That May Affect Emissions Maintenance Replacement Parts If you are aware of any of the follow ing symptoms, have your engine inspected and repaired by your servicing dealer. Hard starting or stalling after starting. Rough idle. Misfiring or backfiring under load. Afterburning (backfiring). Black exha ...
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Honda GX270 - page 45
− − − 43 TECHNICAL & CONSUMER INFORMATION Air Index An Air Index Information hang tag/lab el is applied to engines certified to an emission d urability time period in acco rdance with the requirements of the California Air Resources Board. The bar graph is intended to provide you, our customer, the ability to compare the emissions perform ...
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Honda GX270 - page 46
×× ×× ×× ×× × ×× × ×× ×× ×× ± ± − − 44 TECHNICAL & CONSUMER INFORMATION Specifications GX270 GX390 GX270/GX390 Tuneup ITEM SPECIFICA TION MA INTE NANCE 50.7 lbs (23.0 kg ) 4-stro ke, overhead valve, single cylin der 16.5 cu-in (270 cm ) 3.0 2.3 in (77 58 m m) 15.7 16.9 16.0 in (400 430 407 mm) 8.9 bhp (6.6 kW, 9.0 PS) at ...
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Honda GX270 - page 47
45 TECHNICAL & CONSUMER INFORMATION Wiring Diagra m Engine Types With Oil Alert 01/11/15 11:02:30 31ZK6600_046 ...
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Honda GX270 - page 48
46 TECHNICAL & CONSUMER INFORMATION CONSUMER INFORMATION Honda Publications Shop Manual Parts Catalog These publications will give you additional information for maintaining and repairing your engine. You may order them from your Honda engine dealer. This manual covers complete maintenance and overhaul procedures. It is intended to be used by a ...
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Honda GX270 - page 49
47 TECHNICAL & CONSUMER INFORMATION Warranty Service Infor mation Servicing dealership personnel are trained pr ofessionals. They should be able to answer any question y ou may have. If you encounter a problem that your dealer does not solve to your satisfaction, please discuss it with the dealership’s management. The Service Manager or Gener ...
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Honda GX270 - page 50
48 MEMO 01/11/15 11:02:50 31ZK6600_049 ...
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Honda GX270 - page 51
−− ＋ − QUICK REFERENCE INFORMATION LPG w ith a pr opane conte nt of 9 5%o rh i g h e r Fuel Engine Oil Spark Plug Carburetor Maintenance SAE 30, API SJ, for general use 1.16 US qt (1.10 ) BPR6ES W20EPR-U 0.028 0.031 in (0.70 0.80 mm) Check engine oil level. Check air filter. Change engine oil. Refer to the maintenance schedule on page 22. T ...
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Honda GX270 - page 52
31ZK6601 00X31-ZK6-6010 2003 Honda Motor Co., Ltd. -All Rights Reserved K1:GX390 300.2003.10 Printed in Japan Owner’ s Manual GX270 ・ GX390 LPG-Fueled Engine Black DIC 157 AH HC 英 N EM3 GX270 AH O/M 31ZK6601 GX270 AH O/M 31ZK6601 ...
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