24 590 28 Rev. --KohlerEngines.com
© 2011 by Kohler Co. All rights reserved.
Troubleshooting
Do not attempt to service or replace major engine components, or any items that require special
timing or adjustment procedures. This work should be performed by a Kohler authorized dealer.
Possible Cause
Problem
No
Fuel
Improper
Fuel
Dirt In
Fuel Line
Broken
Fusible
Link
Dirty
Debris
Screen
Incorrect
Oil Level
Engine
Overload
Dirty Air
Cleaner
Faulty
Spark
Plug
Will Not Start
●● ● ● ● ● ● ●
Hard Starting
●● ● ● ● ● ●
Stops Suddenly
●●●●●●
Lacks Power
●● ●● ● ●●
Operates Erratically
●● ● ● ●●
Knocks or Pings
●●●●
Skips or Misfi res
●● ● ●●
Backfi res
●●●●
Overheats
●●●●●
High Fuel
Consumption
●●●
Engine Specifi cations
Model Bore Stroke Displacement
Oil Capacity
(Refi ll)
Spark Plug
Gap
Maximum Angle
of Operation
(@ full oil level)*
ECH630
3.2 in.
(80 mm)
2.72 in.
(69 mm)
42.4 cu. in.
(694 cc)
1.7-2.0 U.S. qt.
(1.6-1.9 L)
0.03 in.
(0.76 mm)
25°
ECV630
ECH650
ECV650
ECH680
ECV680
ECH730
3.27 in.
(83 mm)
45.6 cu in.
(747 cc)
ECV730
ECH740
ECV740
ECH749
ECV749
CH735/CH26
2.6 in.
(67 mm)
44.2 cu. in.
(725 cc)
CV735
CH745
CV745
*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.
Exhaust Emission Control System for models ECH630-ECH749, ECV630-ECV749, CH735/CH26,
CH745, CV735, and CV745 is EM, O2S, ECM, MPI for U.S. EPA, California, and Europe.
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.
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