1987 Service Manual For Mercruiser Alpha 1
This service manual has been written and published by the service department of Mercury Marine to aid our dealers, mechanics and company service per- sonnel when servicing the products described here- in. It is assumed that these personnel are familiar with the servicing procedures of these products, of like or similar products manufactured and marketed by Mercury Marine, and that they have been trained in the recommended servicing procedures for these products which include the use of mechanic’s common hand tools and the special Mercury Marine or recommended tools from other suppliers. We could not possibly know of and advise the service trade of all conceivable procedures by which a ser- vice might be performed and of the possible hazards and/or results of each method. We have not under- taken any suc h wide evaluation. Therefore, anyone who uses a service procedure and/or tool, which is not recommended by the manufacturer, first must completely satisfy himself that neither his nor the product’s safety will be endangered by the ser- vice procedure selected. All information, illustrations and specifications con- tained in this manual are based on the latest product information available at time of publication. It should be kept in mind, while working on the prod- uct, that the electrical system and ignition system are capable of violent and damaging short circuits or se- vere electrical shocks.
1997 4.3 Mercruiser Service Manual
When performing any work where electrical terminals could possibly be grounded or touched by the mechanic, the battery cables should be disconnected at the battery. Any time the intake or exhaust openings are exposed during service they should be covered to protect against accidental entrance of foreign material which could enter the cylinders and cause extensive inter- nal damage when the engine is started. It is important to note that, during any mainte- nance procedure, replacement fasteners must have the same measurements and strength as those re- moved, whether metric or customary. Numbers on the heads of the metric bolts and on surfaces of met- ric nuts indicate their strength.
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Customary bolts use radial lines for this purpose, while most custom- ary nuts do not have strength markings. Mismatched or incorrect fasteners can result in damage or mal- function, or possible personal injury. Therefore, fas- teners removed should be saved for re-use in the same locations whenever possible. Where the fas- teners are not satisfactory for re-use, care should be taken to select a replacement that meets the same specifications as the original.