Technical Manual - trictools.com

1 GX240GX270GX340GX390UT2/RT2 Technical ManualPTR54179 2010 American honda Motor Co., Rights ReservedGX240 GX270 GX340 GX390 (UT2/RT2) Technical Manual 2010 American honda Motor Co., Inc All Rights Reserved1 PrefaceThis Manual covers engine selection, engine installation design and engine installation testing, so the combination of a honda engine and your equipment will make the best possible product. Please feel free to contact your honda engine Distributor at any time for additional Technical information or to discuss your engine application information contained in this Manual is based on the latest product information available at the time of printing. We reserve the right to make changes at anytime without part of this publication may be reproduced, or transmitted, in any form or by any means, electronic, mechanical photocopying, recording or otherwise, without the prior written permission of the publisher.

2 This includes text, figures and Features .. 2 Emission Regulations .. 2 Recommended Power Range .. 3 Maximum Operation .. 3 Continuous Operation .. 3 Power Curve .. 3 Output Confirmation Methods .. 5 Cooling .. 5 Minimum Cooling Air Flow Requirement .. 5 Ambient Temperature Limits .. 5 Testing .. 5 engine Enclosures .. 6 Fuel System .. 7 Fuel Tank Position .. 7 Fuel Line .. 7 Fuel Valve Installation .. 7 Fuel Pump .. 7 Fuel Tank Filter Installation .. 7 Controls .. 7 engine Switch .. 7 Carburetor Controls .. 8 Exhaust System .. 9 Recommended Muffler .. 9 Fabricated Exhaust Systems .. 9 engine Mounting .. 10 Inclination .. 10 Resonance Check .. 10 Electrical System .. 11 Battery .. 11 Fuse .. 11 engine Switch .. 11 Charging Coil Selection .. 12 Lamp Coil Kit (optional) .. 12 Oil Alert System (optional).

3 12 Wiring Precautions .. 12 Wiring Diagrams .. 13No Charge Coil Models .. 13 Electric Start Models .. 13 Power Transmission .. 15V-Belt Connections .. 15 Starting Performance ..16 Installation Considerations ..17 Maintenance Points Accessibility ..17 Dimensional Drawings ..19GX240-270 ..19GX340-390 ..23 PTO Dimensional Drawings ..27H Type (with reduction) ..27L Type (with reduction) ..27P Type ..28Q Type ..28S Type ..29V Type ..29W Type ..30 Dimensions and Weights ..31GX240 ..31GX270 ..33GX340 ..34GX390 ..35 Specifications ..36GX240 ..36GX270 ..36GX340 ..37GX390 ..38 Serviceability ..39 Maintenance Schedule ..39 engine Oil Level Check ..40 engine Oil Change ..41 Air Cleaner Check/Cleaning and Replacement ..41 Sediment Cup Cleaning ..44 Spark Plug Check/Adjustment ..45 Spark Plug Replacement.

4 46 Spark Arrester Cleaning (if equipped) ..46 Idle Speed Check/Adjustment ..47 Valve Clearance Check/Adjustment ..48 Combustion Chamber Cleaning ..49 Fuel Tank and Filter Cleaning ..50 Fuel Tube Check ..50 Evaporative emissions ..51 Types with OEM provided fuel tanks ..51GX240 GX270 GX340 GX390 (UT2/RT2) Technical Manual2 2010 American honda Motor Co., Inc All Rights ReservedINTRODUCTIONH onda engines are designed for minimal maintenance. When maintenance is required, the task is kept simple by providing convenient maintenance access and engines use proven engine technology and design innovations to make them highly reliable FEATURESHigh PerformanceOHV design reduces thermal distortion of the cylinder. This helps maintain the optimum seal between the piston rings and cylinder, which minimizes oil and fuel consumption.

5 Power is also maintained in extreme operating and Quiet OperationOHV design provides a reduced reciprocating mass and balanced weight distribution. The 25 inclined cylinder produces a low center of gravity for the moving parts, which further reduces vibration for quiet operation. These features, and the compact design result in extremely smooth of proven design technologies reduces noise from internal engine components. The hardness of reciprocating parts, the helical cut gears on the crankshaft and camshaft and the use of select materials makes these engines exceptionally quiet. The large muffler is designed to further reduce engines are built with quality that provides proven durability and reliability. Proven features such as OHV design and cast iron cylinder sleeve provide long life in all types of operating conditions.

6 To further enhance the reliability of these engines, a 2-stage air cleaner system, digital electronic ignition system, mechanical centrifugal governor and proven side-draft carburetor are standard REGULATIONSThe honda GX390 engines meet Environmental Protection Agency and the California Air Resources Board regulations. honda engine distributors and equipment manufacturers that use honda engines are required by regulation to follow this OEM Technical Manual . Correct engine matching ensures that the engine will be durable (and emission durable) in GX270 GX340 GX390 (UT2/RT2) Technical Manual 2010 American honda Motor Co., Inc All Rights Reserved3 RECOMMENDED POWER RANGEM aximum OperationOperate the engine at not more than 90% of the maximum horsepower available at a given maximum operating hp = x maximum hpContinuous OperationFor continuous operation (more than 30 minutes), operate the engine at not more than 80% of the maximum horsepower available at a given recommended operating hp = x maximum hpPower CurveGX240GX270 engine SPEED(rpm)200036003000(KW)(HP)OUTPUTTORQ UE131415765489(PS)76548920 NET POWERNET (N m)(lbf ft)(kgf m)RECOMMENDED OPERATING SPEED RANGEENGINE SPEED(rpm)200036003000(KW)(HP)OUTPUTTORQ UE131415765489(PS)76548920 NET POWERNET (N m)(lbf ft)(kgf m)RECOMMENDED OPERATING SPEED RANGEGX240 GX270 GX340 GX390 (UT2/RT2) Technical Manual4 2010 American honda Motor Co.

7 , Inc All Rights ReservedGX340GX390 engine SPEED(rpm)200036003000(KW)(HP)OUTPUTTORQ UE171819209876101112(PS)98761011122628 NET POWERNET (N m)(lbf ft)(kgf m)RECOMMENDED OPERATING SPEED RANGEENGINE SPEED200036003000 RECOMMENDED OPERATING SPEED RANGE(min-1 [TRO])(N m)28(KW)(HP)(lbf ft)(kgf m) POWERNET GX270 GX340 GX390 (UT2/RT2) Technical Manual 2010 American honda Motor Co., Inc All Rights Reserved5 Output Confirmation MethodsGovernor Rod MeasurementWhen the engine is properly matched and operating at its continuous rated load, the carburetor throttle angle should be approximately half way between full open and full closed positions. Bring the engine to normal operating temperature and then apply the expected continuous load. If the throttle is more than halfway open, the engine is being overloaded resulting in overheating and shortened engine RPM MeasurementNormal governor droop can also be used to measure engine load.

8 At rated speed: engine is operating within the continuous recommended power Minimum Cooling Air Flow RequirementEngine enclosure must have the minimum cooling air flow listed : 7 m3 (247 ft3) per minute at 3,600 rpmGX340/GX390: 8 m3 (282 ft3) per minute at 3,600 rpmAmbient Temperature Limits-15 to +40 C (+5 to +104 F)Testing Use thermocouple temperature probes at the specified locations. Operate the engine under worst-case conditions An electronic data logger is required for the temperature data collection Set up the data logger to take multiple readings per minute. If data is being taken manually, a reading every 5 minutes is adequate. Take readings until the engine oil temperature is stabilized at continuous rated load Run the application for one hour of continuous operation; the temperatures should be stabilized in that time.

9 If the application is used only for short intervals, note the normal run time in the application document. Shut the engine down and continue to take readings. Attempt to restart the engine after heat soaking for 5 minutes. For enclosed applications, fuel bowl temperature should be monitored after testing until the maximum is reached - this may take several minutesrpm with loadrpm without load1-()100% 5%GX240 GX270 GX340 GX390 (UT2/RT2) Technical Manual6 2010 American honda Motor Co., Inc All Rights ReservedMaximum Operating TemperaturesThese temperatures are based on an ambient temperature of 40 C (104 F). Compensate for any deviation linearly; , if the ambient temperature is 20 C (68 F), the maximum acceptable oil temperature is 120 C (248 F).Adjusted oil temperatures of less than 40 C will require more frequent oil EnclosuresWhen the engine installation in the equipment obscures the emission label, a duplicate label must be applied.

10 In this case, as part of the engine matching process, it will be necessary to establish a process for the OEM to obtain duplicate labels. EPA requires full documentation, control, and record keeping of the duplicate label Air IntakeThe engine must be provided with a cooling duct so that fresh air can be drawn directly from outside the enclosure cover. Install the cooling air duct with the intake port in a place free from dust and dirt. The cooling air volume changes according to the shape of the duct and screen and the engine installation conditions. Operate the engine under the normal operating conditions and be sure that the engine meets all temperature cooling air duct must have a cross-sectional area of at least 300 cm2 ( sq in).When the engine is operated in dusty areas, install a filter at the enclosure inlet for the cooling air.