Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 3Get this manual
It 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 strengthAmerican 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 re-use, care should be taken to select replacement that matches the original Cleanliness and Care of Outboard Motor
A marine power product is combination of many machined, honed, polished and lapped surfaces with tolerances that are measured in the ten thousands of an inchmmWhen any product component is serviced, care and cleanliness are importantThroughout this manual, it should be understood that proper cleaning, and protection of machined surfaces and friction areas is part of the repair procedureThis is considered standard shop practice even if not specifically statedWhenever components are removed for service, they should be retained in orderAt the time of installation, they should be installed in the same locations and with the same mating surfaces as when removedPersonnel should not work on or under an outboard which is suspendedOutboards should be attached to work stands, or lowered to ground as soon as possibleWe reserve the right to make changes to this manual without prior notificationRefer to dealer service bulletins for other pertinent information concerning the products described in this manual