2005+ Mercury Verado 4 Stroke 200/225/250/275 6 gear housing Service Manual, Page 3Get this manual
Precautions It should be kept in mind, while working on the product, that the electrical and ignition systems are capable of violent a,.d damaging short circuits or severe electrical shocksWhen performing any work where electrical terminals could possibly be grounded or touched by the mechanic, the battery cables should be disconnected at the batteryAny 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 internal damage when the engine is startedIt is important to note, during any maintenance procedure replacement fasteners must have the same measurements and strength as those removedNumbers on the heads of the metric bolts and on the surfaces of metric nuts indicate their strE 19thAmerican bolts use radial lines for this purpose, while most American nuts do not have strength markingsMismatched or incorrect fasteners can result in damage or malfunction, or possibly personal injuryTherefore, fasteners removed should be saved for reuse in the same locations whenever possibleWhere the fasteners are not satisfactory for reuse, care should be taken to select replacement that matches the original