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24 590 52 Rev. --

KohlerEngines.com

Engine Specifi cations

Model

Bore

Stroke Displacement Oil Capacity 

(Refi ll)

Spark Plug 

Gap

Maximum Angle 

of Operation 

(@ full oil level)*

PCH680

3.27 in. 

(83 mm)

2.72 in. 

(69 mm)

45.6 cu. in. 

(747 cc)

1.7-2.0 U.S. qt. 

(1.6-1.9 L)

0.030 in. 

(0.76 mm)

25°

PCV680
PCH740
PCV740

*Exceeding maximum angle of operation may cause engine damage from insuffi  cient lubrication.
Additional specifi cation information can be found in service manual at KohlerEngines.com.
Any and all horsepower (hp) references by Kohler are Certifi ed Power Ratings and per SAE J1940 

& J1995 hp standards. Details on Certifi ed Power Ratings can be found at KohlerEngines.com.

Emission Control System

Exhaust Emission Control System for propane EFI models PCH680, PCH740, and PCV680, 

PCV740 is EM, O2S, ECM, MPI for U.S. EPA, California, and Europe.
NOTE:  Tampering with the engine and its emission control system voids the EPA Certifi cate of 

Conformity, ARB Executive Order, and EU type-approval.

Summary of Contents for command pro PCH680

Page 1: ...ines com Please review carefully as it provides your speci c rights and obligations To maintain compliance with applicable emission regulations exhaust system backpressure may not exceed limits which...

Page 2: ...xide is odorless colorless and can cause death if inhaled WARNING High Pressure Fluids can puncture skin and cause severe injury or death Do not work on fuel system without proper training or safety e...

Page 3: ...K Air Cleaner Cover L Element Cover M Precleaner N Paper Element O Air Cleaner Base P Rubber Seal Q Low Pro le Air Cleaner R Debris Screen S Oil Filter T Vaporizer Regulator U Vaporizer Regulator Inl...

Page 4: ...nes can burn out starter motor NOTE Upon start up a metallic ticking may occur Run engine for 5 minutes If noise continues run engine at mid throttle for 20 minutes If noise persists take engine to yo...

Page 5: ...low pro le precleaner if equipped Every 100 Hours1 Check oil cooler ns clean as necessary if equipped Change oil Replace low pro le air cleaner element if equipped Remove cooling shrouds and clean coo...

Page 6: ...stall and secure dipstick Change Oil and Filter Change oil while engine is warm 1 Clean area around oil ll cap dipstick and drain plug Remove drain plug and oil ll cap dipstick Allow oil to drain comp...

Page 7: ...eous vapor state Lock O assembly opens and closes controlling fuel ow from supply tank before reaching vaporizer regulator Over time fuel deposits can accumulate inside vaporizer regulator Removing th...

Page 8: ...if equipped Ensure end of breather tube is properly connected Oil Cooler if equipped 1 Clean ns with a brush or compressed air 2 Remove two screws securing oil cooler and tilt to clean back side 3 Rei...

Page 9: ...r Possible Cause Problem No Fuel Tank Nearly Empty Improper Fuel Dirt In Fuel Line Broken Fusible Link Dirty Restricted Vaporizer Regulator Inlet Filter Dirty Debris Screen Incorrect Oil Level Engine...

Page 10: ...dditional speci cation information can be found in service manual at KohlerEngines com Any and all horsepower hp references by Kohler are Certi ed Power Ratings and per SAE J1940 J1995 hp standards De...

Page 11: ...11 24 590 52 Rev KohlerEngines com...

Page 12: ...24 590 52 Rev KohlerEngines com 2018 by Kohler Co All rights reserved...

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