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FUSO 4M4 – Engine – STRUCTURE AND OPERATION – Piston

•For selective fit of the pistons with the upper crankcase, match corresponding size marks on the pistons and upper crankcase. The size marks of the pistons are “A” through “C” and the “C” marked piston has the largest outside diameter.
• Install the pistons with the front marks facing forward of the engine.

 

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