6304_36562 EFI Brochure_Final
Contents
1. KOHLER EFI Engines complete performance solutions THE ULTIMATE IN FUEL EFFICIENCY KOHLER EFI engines 26 and 28 HP save money by significantly reducing fuel consumption In consumer tests EFI engines reduced fuel consumption by 25 30 compared to carbureted engines With those numbers each piece of equipment saves 400 S500 every year And the engines exceed CARB EPA and international requirements for exhaust emissions MAXIMUM EQUIPMENT UPTIME Superior fuel efficiency peak power and instant throttle response all contribute to jobs getting done faster and with fewer stops for fuel KOHLER EFI SYSTEM BEATS THE COMPETITION Only Kohler features a closed loop EFI system in which all the components work together By feeding data to the Electronic Control Unit ECU so it can adjust for changes in load altitude and air cleaner condition the fuel economy and engine pertormance are maximized The only competitive EFI engine in this horsepower range has an open loop system so it cannot adjust to changing conditions OPEN LOOP SYSTEM When first started all EFI engines operate in an open loop mode This means the engine can run only as originally mapped in the ECU However unlike the competitor s system which remains open loop the EFI system by Kohler converts to closed loop upon warm up CLOSED LOOP SYSTEM Only KOHLER EFI engines include an oxygen sensor which triggers adjustments t2. e Detect and show fault codes if one arises e identify the problem e Provide flowcharts to troubleshoot the fault e Assist the technician in the repair procedure EFI SERVICE MANUAL The CD ROM also includes the EFI service manual subsection shown The 40 page section includes explanations about EFI how the engine starts up its electrical and fuel components and troubleshooting hints Order the complete EFI diagnostic system 25 761 23 S from your Kohler supply source EFI SERVICE KIT Complete with carrying case fuel pressure gauge Oetiker clamp pliers spare clamps circuit tester jumper plugs and a T valve Order the kit K03217 from SPX Corporation USA amp Canada 800 533 0492 International 507 455 7223 KILOWATTS NEWTON METERS LITERS PER HOUR MAXIMUM amp RECOMMENDED POWER u REVOLUTIONS PER MINUTE Fr 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 C26 MAXIMUM 026 RECOMMENDED 745 MAXIMUM 745 RECOMMENDED MAXIMUM amp RECOMMENDED TORQUE REVOLUTIONS PER MINUTE 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 C26 MAXIMUM C745 MAXIMUM 026 RECOMMENDED gt C745 RECOMMENDED RECOMMENDED FUEL CONSUMPTION AT 1 2 LOAD 1800 REVOLUTIONS PER MINUTE 2400 3000 0 C26 C745 HORSEPOWER LB FT GALLONS PER HOUR KOHLER COMMAND PRO KOHLER EFI Why the professionals are choosing KOHLER EFI engines Mi
3. MODEL POWER E 3600 RPM hp kW Moximum Recommended COOLING CRANKSHAFT ORIENTATION DISPLACEMENT cu in cc BORE in mm STROKE in mm lbs ft Nm rpm PEAK TORQUE Maximum COMPRESSION RATIO DRY WEIGHT Ibs kg OIL CAPACITY WITH FILTER U S qts L MOUNTING DIMENSIONS in mm Front to Back Side to Side OVERALL DIMENSIONS in mm Length Width With air cleaner Height a CH b 1 26 19 4 22 1 16 5 Air Horizontal 44 725 3 3 83 2 6 67 40 54 2 2800 9 94 43 2 1 2 3 5 89 7 3 184 2 See a below flat air cleaner heavy duty air cleaner commercial air cleaner heavy duty air cleaner 26 19 4 22 1 16 5 Air Vertical 44 725 3 3 83 2 6 67 40 54 2 2800 9 94 43 2 1 2 10 254 DBC 10 254 DBC See b below Length 13 8 351 Length 13 8 351 Length 21 2 538 Length 19 483 CH745 28 20 9 23 8 17 2 Air Horizontal 44 725 3 3 83 2 6 67 42 3 57 4 3000 9 94 43 2 1 2 3 5 89 7 3 184 2 See a below Width 17 7 451 Width 17 7 451 Width 17 7 451 Width 17 7 451 CV745 28 20 9 23 8 17 2 Air Vertical 44 725 3 3 03 2 6 67 42 3 57 4 3000 9 94 43 2 1 2 10 254 DBC 10 254 DBC See b below Height 19 483 Height 26 5 672 Height 14 3 363 Height 22 5 572 Horsepower ratings are in accordance with SAE J1940 Actual e
4. CONTROL UNIT ECU An ECU is the brain of EFI It includes program maps to monitor all primary sensors such as speed throttle position oil temperature and oxygen levels When the watertight ECU senses that a throttle response is needed a precise amount of fuel is injected During operation if a system fault does occur the ECU detects the fault and triggers the on board diagnostic system which stores the code for analysis An all weather connector locks to the ECU as part of the harness system THROTTLE POSITION SENSOR TPS The TPS indicates throttle plate angle to the ECU When the engine senses varying loads the ECU uses the TPS plus other sensors to save fuel and ensure smooth power ENGINE TEMPERATURE SENSOR This sensor helps determine the amount of fuel needed upon start up A cold engine requires more fuel than one at or near operating temperature The ECU depends upon this sensor to govern fuel flow and ensure reliable starts OXYGEN SENSOR Only Kohler uses an oxygen sensor in its EFI system This is a critical component in the closed loop system that separates Kohler from the competition The oxygen sensor installed in the muffler signals the ECU when oxygen content changes between the exhaust gas and the ambient air If the oxygen content strays from the ideal air tuel mixture mapped in the ECU the ECU then adjusts the fuel injector pulse for more or less fuel Again
5. chopper type grass screen e High oil temperature cutout switch KOHLER engines Printed in USA E 2103 9 03
6. ke Devore Executive Director Atlanta based Ed Castro Landscaping 26 and 28 HP Qur customers make a living with our products and the reliability of KOHLER EFI engines has given them peace of mind The KOHLER EFI engine reduces the consumer s expenses Fuel economy is the biggest benefit Not to mention that the engine is able to relay what is wrong so it takes care of diagnostic time Jeff Haltom General Manager Dixie Chopper The EFI offers significant performance improvements over non EFl engines as far as power under load conditions It recovers quickly and just keeps going Of course the obvious benefits we have promoted since we began using the KOHLER 28 HP engine are fuel economy and all the reasons they are more fuel efficient and lower emissions for states like Texas and California where that is a big issue Rick Curlett of Exmark It s really a no brainer You get more power less downtime and more hours We didn t buy EFI engines for their fuel efficiency or the lower emissions but if the power is there and we re saving gasoline at the same time why not Mike Devore Executive Director at Atlanta based Ed Castro Landscaping DN 2 sale MODEL SPECIFICATIONS ENGINE TYPE Four cycle V twin cylinder air cooled horizontal and vertical shaft electronic fuel injection EFI gasoline full pressure lubrication with oil filter aluminum head and crankcase with cast iron cylinder liners
7. ngine horsepower is lower and affected by but not limited to accessories air cleaner exhaust charging cooling etc application engine speed and ambient operating conditions temperature humidity and altitude For more information contact Kohler Co Engines Engineering Department Kohler reserves the right to change product specifications designs and equipment without Notice and without incurring obligation CH Length is grass screen to PTO mounting face Width is oil filter side to starter side Height is mounting feet to top of air cleaner CV Lengthis blower housing to air cleaner cover Width is oil filter side to starter side Height is mounting feet to top of air cleaner Features e Overhead valve design e Hydraulic valve litters e Large air filter e Oil Sentrym Options e Variety of crankshafts e Flywheel PTOS CH e Full pressure lubrication with filter e 15 or 25 amp charging regulated e Muffler guard e Hardened crankshaft journals e PTO thrust bearing CH e PTO side load bearing CV e Electronic ignition e 20 amp charging regulated e Exhaust deflectors spark arrestors e 2 volt solenoid shift electric starter Certification US97 0977 FOR MORE INFORMATION CONTACT YOUR KOHLER SOURCE OF SUPPLY OR CALL TOLL FREE IN THE U S AND CANADA 1 800 544 2444 KOHLER CO KOHLER WISCONSIN 53044 TEL 920 457 4441 FAX 920 459 1570 KohlerEngines com 2003 by Kohler Co All rights reserved e Metal
8. o the ECU map The sensor measures oxygen in the exhaust flow If the oxygen level strays from the ideal air fuel mixture it signals the ECU to adjust the amount of fuel injected into the system The loop between air fuel intake and exhaust output is then closed providing the critical feedback necessary to achieve optimum fuel economy and pertormance The KOHLER closed loop system offers these advantages over competition e Better fuel economy e Better adaptability to altitude changes e Lower exhaust emissions e Better adaptability to air cleaner conditions 26 HP Horizontal and Vertical KOHLER Command PRO gt Y Air Cooled Engine KOHLER Command PRO 28 HP Vertical and Horizontal Air Cooled Engine EFI TECHNOLOGY OFFERS KEY ADVANTAGES OVER CARBURETED ENGINES e Lower fuel consumption e Powerful acceleration e Excellent cold startability e Fast throttle response e Lower exhaust emissions e Peak power and torque e Easy diagnostics e Easy starts no choke The KOHLER EFI system is a complete engine fuel and ignition management design and includes these principal components e Fuel pressure regulator e Twin fuel injectors e Electronic control unit ECU e External high energy ignition coils e Engine temperature sensor e Throttle position sensor TPS e Speed sensor e Oxygen sensor e On board system diagnostics Exceptional system integrated components from Kohler and Bosch ELECTRONIC
9. this saves fuel and maximizes power ENGINE SPEED SENSOR Engine speed is determined by the ya engine speed sensor Located beside 4 the flywheel the passing of ring gear teeth generates voltage pulses Data is fed to the ECU to provide instant throttle response and precise fuel flow When power is needed it s there immediately FUEL PRESSURE REGULATOR The fuel pressure regulator maintains the required operating system pressure 39 psi Anytime fuel pressure exceeds this level excess pressure is relieved and any extra fuel is returned to the fuel tank Superior diagnostic and service support In addition to the items below Kohler offers an in depth EFI Troubleshooting CD TP 2552 from your Kohler source of supply Training trailers and portable EFI training stands are also available for Central Distributor and OEM assistance Contact your Kohler salesperson to arrange for the trailers and training stands COMPLETE EFI DIAGNOSTIC SYSTEM A complete diagnostic system photos A B C for KOHLER EFI engines has been designed by Kohler and the Robert Bosch Corp This system includes a 60 page installation guide and user manual a CD for use on your laptop or desktop PC and a 9 foot interface cable that mates to the engine s diagnostic plug WELCOME SCREEN As part of the system a welcome screen first appears on the CD The system then begins to talk to the engine ECU The system will
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