User manual KOHLER K91

[. . . ] OWNER's MAN UAL MODELS K91 I (4 hP) Kl6l, &Kl81 (7 hP) (8 hP) operating & maintenance instructions CONGRATULATIONS-You have selected a fine four-cycle engine. Kohler designs strength and on-the-job durability into each engine. . . making a Kohler engine dependable. . . dependability you can count on. n long-life 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 rebored, these engines can last even longer. Kohler engines are easy to service, all routine service air filter, carburetor--are easily and quickly accessible. parts--points, condenser, spark plug, n 0 Every Kohler engine is backed by a worldwide network of over 10, 000 distributors and dealers. [. . . ] Remove the plug and check its condition. Replace the plug if worn or reuse is questionable. NOTE: Do not clean the spark plug in a machine using abrasive grit. Some grit could remain in the spark plug and enter the engine causing extensive wear and damage. 3. Check gap (0. 025") using a wire feeler gauge. Adjust the gap as necessary by carefully bending the ground electrode. Install the plug and torque to 18-22 ft. lb. Wire 2. / CARBU. RETOR TRdUBLESHOOTlNG Kohler K91, K161 and K181 engines are equipped with one of two basic types of carburetors - Kohler or Walbro - fixed main jet or adjustable main jet. The carburetor is designed to deliver the correct fuelto-air mixture to the engine under all operating conditions. The main fuel and idle fuel needles on adjustable jet carburetors are set at the factory and normally do not require further adjustment. On fixed jet carburetors, the low idle fuel needle is also set at the factory and normally does not need further adjustment. The main fuel jet is calibrated and installed at the factory and is not adjustable*. *NOTE: Engines operating at attitudes above approximately 1830 m (6000 ft) may require a special "high altitude" main jet. AND ADJUSTMENTS Carburetor adjustments should be made on/y after engine has warmed up. Kohler Carburetor Adjustment 1. With the engine stopped, turn the fuel adjusting needles In (clockwise) until they bottom lightly. NOTE: The tips of the fuel adjusting needles are tapered to critical dimensions. Damage to the needles and seats in carburetor body will result if the needles are forced. adjusting needles out (counterclockwise) from lightly bottomed as follows: 1 KOHLER ADJ. 1 LOW IDLE 1 l-1/2 TURNS 1 l-l/2 TURNS 1 MAIN FUEL 1 2TURNS 1 3TURNS 2 TURNS . I I K91 K161 K181 TROUBLESHOOTING If engine troubles are experienced that appear to be caused by the carburetor, check the following areas before adjusting the carburetor. Make sure the fuel tank is filled with clean, fresh gasoline. Make sure the fuel tank cap vent is not blocked and that it is operating properly. Make sure fuel is reaching the carburetor. This includes checking the fuel shut-off valve, fuel tank filter screen, in-line fuel filter, fuel lines, and fuel pump for restrictions or faulty components as necessary. Make sure the air cleaner base and carburetor is securely fastened to the engine using gaskets in good condition. Make sure the air cleaner element is clean and all air cleaner components are fastened securely. after checking the items listed above, starting or engine operation problems exist, it may be necessary to adjust or service the carburetor. [. . . ] Include letter suffixes if there are any. See "Engine Identification Numbers" above. 14 SPECIFICATIONS K91 Power Rating at4000 RPM . . . L. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]