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OWNER’s MAN UAL
MODELS
K91
I
(4 hP)
Kl6l,&Kl81
(8 hP)
(7 hP)
operating & maintenance
instructions
CONGRATULATIONS-You have selected a fine four-cycle engine. Kohler designs long-life
strength and on-the-job durability into each engine...making a Kohler engine
dependable...dependability you can count on.
n Parts subject to the most wear and tear (like cylinders, crankshafts, and camshafts) are
made from precision-formulated castiron...and because the cast iron cylinders can be
rebo
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Safety Information For Your Safety! These precautions should be followed at all times. Failure to.follow these precautions could result in injury to yourself and others. A WARNING A WARNING A WARNING # r- -v db u Explosive Fuel can cause fires and Rotating Parts can cause severe Hot Parts can cause severe burns. severe burns. injury. Do not touch engine while operating Stop engine before filling fuel tank. Stay away while engine is in or just after stopping. operation. Explosiv
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FUEL RECOMMENDATIONS OIL RECOMMENDATIONS Using the proper type and weight crankcase oil is WARNING: Explosive Fuel1 e, Gasoline is extremely flammable and its vapors can extremely important as is checking oil daily and explode if ignited. Store gasoline only in approved changing oil and filter regularly. (See ‘Required containers, in well-ventilated, unoccupied buildings, Maintenance” on page 7.) Failure to use the correct oil away from sparks or flames. Do not fill the fuel tank or using
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OPERATING INSTRUCTIONS ALSO READ THE OPERATING INSTRUCTIONS OF THE EQUIPMENT THIS ENGINE POWERS For A Retractable Start Engine - SLOWLY pull the PRE-START CHECKLIST starter handle until just past compression - STOP! Return starter handle, pull firmly with a smooth, steady cl Check oil level. Add oil if low. motion to start. Pull the handle straight out to avoid excessive rope wear from the starter rope guide. cl Check fuel level. Add fuel if low. Extend the starting rope periodically
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BAlTERY ’ and NOTE: If debris builds up on air intake screen other intake areas, STOP the engine L A 12 volt battery is normally used. Refer to the intake immediately and clean. Obstructed air operating instructions of the equipment this engine areas cause engine damage due to powers for specific information. overheating. If the battery charge is not sufficient to turn over the A WARNING: Hot Parts! engine, recharge the battery (see page 13). Engine components can get extremely hot
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MAINTENANCE INSTRUCTIONS WARNING: Accidental Starts! A Before servicing the engine or equipment, always disconnect the spark plug lead to prevent the engine from starting accidentally. Ground the spark plug lead to prevent sparks that could cause fires. Make sure the equipment is in neutral. These service procedures should also be performed as part of any seasonal tune-up. Maintenance Rewired Frecwencv CleanAirlntakeScreen’ ................................................................
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Precleaner Air Filter Plate Wing Nut 3 . Check gap (0.025”) using a wire feeler gauge. SPARK PLUGS Adjust the gap as necessary by carefully bending the ground electrode. Install the plug Every 100 hours of operation remove the spark plug, and torque to 18-22 ft. lb. check condition and reset the gap, or replace with a new plug as necessary. 1 . Before removing the spark plug, clean the area Wire around the base of the plug to keep dirt and debris out of the engine. 2 . Remove th
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CARBU.RETOR TRdUBLESHOOTlNG AND ADJUSTMENTS Carburetor adjustments should be made on/y after engine has warmed up. Kohler K91, K161 and K181 engines are equipped Kohler Carburetor Adjustment with one of two basic types of carburetors - Kohler or Walbro - fixed main jet or adjustable main jet. 1 . With the engine stopped, turn the fuel adjusting needles In (clockwise) until they bottom lightly. The carburetor is designed to deliver the correct fuel- to-air mixture to the engine under all
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5 . Low Idle Fuel Needle Setting: Place the throttle Walbro Carburetor Adjustment into the Tdlem or %low’ position. 3 .Idle SDeed Screw Turn the low idle fuel adjusting needle out (counterclockwise) from the preliminary setting until the engine speed decreases (rich). Note the position of the needle. Now turn the adjusting needle In (clockwise). The engine speed may increase, then it will decrease as the needle is turned in (lean). Note the position of the needle. \ Main Fuel Needl
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. 3 Start the engine and run at hatf throttle for five to Back out ten minutes to warm up. The engine must be Appx. 118 warm before making final settings. to 114 turn. Lean Lean 4 . Main Fuel Needle Setting: This adjustment is I I required only for adjustable main jet carburetors. \ I I \ If the carburetor is a fixed main jet type, disregard I I CI this setting. I \I { --- v Place the throttle into the Vast” position. Turn the adjusting needle In (clockwise). The @ c3
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Dirt Dirty Inconed Engine Dirty F=m No Im In Air oil over- Fitter spark TROUBLESHOOTING Fuel P= ueI FueILineScreen IAM Loaded Element mug When a problem occurs, do not Will not start X X X X X X overlook the simple causes. For Hard starting X X X X X X example, starting problems could be Stops suddenly X X X X X X caused by an empty fuel tank. The Lacks power X X X X X X X table lists some common causes of Operates troubles. erratically X X X X X X Knock& or pings X X X X Do not
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A/ways insist on genuine Kohler pans. All genuine Kohler parts meet strict standards for fit, reliability, MODEL DESIGNATION and performance. The Model number designates the cubic inch STORAGE displacement and the number of cylinders--Model K181S; for example: designates 18 cubic inch displacement, 1 designates single cylinder. The If the engine is to be out of service for approximately two months or more, use the following storage letter suffii designates a specific version as follows
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SPECIFICATIONS K91 Power Rating at4000 RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...? . . . . . . . . . . . . . . . . . . . . . ..4hp 8.9 in3 (145 cm3) Displacement . . ,..,..............,,.,,.................................... 2.375 in (60.33 mm) Bore . . . . . . . . . . . . . . . . . . . . . . . . ..l.............................~ . . . . . . . . 2.000 in (50.80 mm) Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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LIMITED 1 YEAR ENGINE WARRANTY We warrant to the original consumer that each new engine sold by us will be free from manufacturing defects in materials or workmanship in normal service for a period of one (1) year from date of purchase, provided it is operated and maintained in accordance with Kohler Co.% instructions and manuals. Our obligation under this warranty is expressly limited, at our option, to the replacement or repair at Kohler Co., Kohler, Wisconsin, 53044, or at a service faci
