816286 Mercruiser HOSE, OIL COOLER TO THERMOSTAT HOUSING - OLD DESIGN

To prevent damage to the intake and exhaust valves, an adjustment must be made to the valve clearance setting. Loosen the nuts on each rocker arm and move the adjustment screw on each rocker arm away from the bridge as far as possible.
1. Put engine in position on Tool (A) and turn the engine over on its side. Make sure the blocks that are used as support for the top of the engine are against the cylinder head only and not against the exhaust manifold or valve cover bases. 2. Loosen the nuts that hold each connecting rod bearing caps (1) in position. Turn the crankshaft if necessary to loosen all the nuts. Make sure the nuts are still tight enough to hold the bearing caps in place when the crankshaft is turned. 3. Turn the crankshaft so that "V" on the crankshaft gear is in alignment with "V" mark (3) on the idler gear.4. Remove the bearing caps that hold the connecting rods in position against the crankshaft. 5. Remove bearings (4) from each bearing cap. Make sure that each bearing is kept with the bearing cap it is removed from for correct installation purposes. 6. Remove