Fits a 160cc lawnmower. There are 4 gaskets and a gasket block that fit over 2 long bolts that go through the base of the air cleaner and thread into the engine block. It takes some very skilled fingers and a lot of swearing to assemble an air cleaner base with screws, crankcase breather, gaskets, spacer, carburetor, throttle plate, kill switch and automatic choke all lined up and bolted to the engine, not to mention the fuel line. After all this, the engine started from the second jolt and worked without further adjustments. Looks like rivets are a better option.
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