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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 Misres
● ● ● ● ●
Backres
● ● ● ● ●
Overheats
● ● ● ● ● ●
High Fuel
Consumption
● ● ●
Engine Specications
Model Bore Stroke Displacement
Oil Capacity
(Rell)
Spark Plug
Gap
Maximum Angle
of Operation
(@ full oil level)*
XT-6, XT6.5,
XT6.75
2.56 in.
(65 mm)
1.8 in.
(45 mm)
9.1 cu. in.
(149 cc)
20 oz.
(0.60 L)
0.03 in.
(0.76 mm)
20°
XT-7, XT8
2.75 in.
(70 mm)
10.6 cu. in.
(173 cc)
*Exceeding maximum angle of operation may cause engine damage from insufcient lubrication.
Additional specication information can be found in service manual at KohlerEngines.com.
Exhaust Emission Control System for models XT-6, XT6.5, XT6.75, XT-7, XT8 is EM for U.S. EPA,
California, and Europe.
Any and all horsepower (hp) references by Kohler are Certied Power Ratings and per SAE J1940
& J1995 hp standards. Details on Certied Power Ratings can be found at KohlerEngines.com.