Mercury 7U7Z-6312-A Crankshaft Pulley

To replace or reposition the crankshaft pulley, initially, the drivebelt has to be removed. After that, remove the crankshaft pulley bolt.Later, remove the pulley and the crankshaft sprocket. A larger, shorter bolt is screwed into the crankshaft in order to afford the puller a 'bite.' Then an appropriate puller is to be used in the removal of the crankshaft pulley, which is not to be pryed or tapped with an impact puller. Clean the area of the pulley that the front seal sits against and apply clean engine oil the apply the crankshaft pulley without hammering on it then tighten the pulley bolt to its required torque. To replacement of front oil seal, the crankshaft pulley should be removed before prying out the seal using a screwdriver. If possible use a scraper or sharp tool to clean out further the seal bore and check for roughness or uneven surfaces. Put a thin layer of clean engine oil on the lip of the new seal and get it into the bore by means of a socket or a section of pipe a little smaller in size than the seal while seeing to it that the exposed end of the seal is on the inside of the engine. Lastly, a crankshaft pulley need to be placed in its position again.

Before adjusting the size of the gap to adjust the crankshaft pulley, it is necessary to decommission the drivebelt. Secondly, take out the crankshaft pulley bolt. Thread a longer shorter diameter bolt into the crankshaft to act as a stop for the puller then use a puller for this purpose to remove the crankshaft pulley. Do not try to pry the pulley off or use perchance a impact puller. Coat with clean engine oil the interface contact surface of the pulley that engages the front seal before fitting the crankshaft pulley to the crankshaft without hammering, then, tighten the pulley bolt to the recommended torque. To replace front oil seal, first, remove the crankshaft pulley, the oil seal then is removed by prying it out with a screwdriver being cautious not to damage the cover in the process. Scrub the seal bore and check for roughness or injuries on it with sharp edges or scratches. Apply clean engine oil to the lip of the new seal and insert it into the bore with a socket or a piece of pipe which is slightly smaller in diameter than the seal with the open side of the seal pointing towards the engine. Last of all, the crankshaft pulley ought to be repositioned back.

Remove the fender splash shield.

Unscrew the pulley bolt and remove the pulley, noting which way round it is fitted.

Lightly coat the crankshaft front seal with clean engine oil, then install the crankshaft pulley.