O.S. Engines Notes on installing cooling fan and clutch

Notes on installing cooling fan and clutch

		Do not use a tool which locks piston when installing a cooling-fan and clutch, or top of the piston may be damaged. Also, do not insert a screw driver or the similar into the exhaust port.
		It is recommended to use Crankshaft Clamp 7091 (Stock Number: OSMR1005; Mfg. Number: 71530500) available as an optional tool. It is made of durable engineering plastic and locks the crankshaft without risk of damage to any part of the engine.

Application is as follows:

		Remove the crankcase rear cover plate from the engine and rotate the crankshaft to the bottom dead center (BDC) position.
		Insert the crankshaft clamp so that its grooved portion surrounds the crankpin and lower end of the connecting rod and securely tighten the fan or clutch onto the crankshaft.