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.
Problem
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
2.56 in.
HD675
(65 mm)
2.75 in.
HD775
(70 mm)
HD950
2.87 in.
(73 mm)
HD1100
*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 models HD675, HD775, HD950, and HD1100 is EM 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.
8
Dirt In
No
Improper
Fuel
Fuel
Fuel
Line
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Stroke Displacement
9.1 cu. in.
(149 cc)
1.80 in.
(45 mm)
10.6 cu. in.
(173 cc)
1.89 in.
12.2 cu. in.
(48 mm)
(200 cc)
2.11 in.
13.7 cu. in.
(53.5 mm)
(224 cc)
KohlerEngines.com
Possible Cause
Dirty
Debris
Incorrect
Screen
Oil Level
Overloaded
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Oil Capacity
(Refi ll)
20 oz.
(0.60 L)
Engine
Dirty Air
Cleaner
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Maximum Angle
Spark Plug
of Operation
Gap
(@ full oil level)*
0.030 in.
20°
(0.76 mm)
14 590 53 Rev. --
Faulty
Spark
Plug
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