Kohler KT722 - Page 8

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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
Dirty
Debris
Screen
Incorrect
Oil Level
Engine
Overloaded
Dirty Air
Cleaner
Faulty
Spark
Plug
Will Not Start
● ● ● ● ● ● ●
Hard Starting
● ● ● ● ● ●
Stops Suddenly
● ● ● ● ● ● ●
Lacks Power
● ● ● ● ● ● ●
Operates Erratically
● ● ● ● ● ●
Knocks or Pings
● ● ● ●
Skips or Misres
● ● ● ● ●
Backres
● ● ● ● ●
Overheats
● ● ● ● ● ●
High Fuel
Consumption
● ● ●
Engine Specications
Model Bore Stroke Displacement
Oil Capacity
(Rell)
Spark
Plug Gap
Maximum Angle
of Operation
(@ full oil level)*
KT610
3.27 in.
(83 mm)
2.4 in.
(61 mm)
40.3 cu. in.
(660 cc)
2.0 U.S. qt.
(1.9 L)
0.030 in.
(0.76 mm)
25°
KT620
KT715
2.6 in.
(67 mm)
44.2 cu. in.
(725 cc)
KT725
KT730
KT735
KT740**
KT720
2.7 in.
(69 mm)
45.6 cu. in.
(747 cc)
KT722
KT724
KT726
KT745
*Exceeding maximum angle of operation may cause engine damage from insufcient lubrication.
**KT740 engines with PRO Performance Air Cleaner have 45.6 cu. in. (747 cc) Displacement.
Additional 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. Details on Certied Power Ratings can be found at KohlerEngines.com.
Emission Control System
Exhaust Emission Control System for models KT600-KT620 and KT715-KT745 prior to Model Year
2024 is EM for U.S. EPA, California, and Europe.
Beginning in Model Year 2024, Exhaust Emissions Control System for models KT600-KT620,
KT715-KT745, and KT720-KT726 is EM for U.S. EPA and Europe.
NOTE: Tampering with the engine and its emission control system voids the EPA Certicate of
Conformity, ARB Executive Order, and EU type-approval.