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Mercruiser 4 3 drain plugs.
Before boats are stowed away for the winter they must undergo a process known as winterization this means that the engine is completely emptied cleaned and antifreeze is applied so that damage does not occur over the cold season.
4 3 mercruiser drain plugs diagram.
It is equipped with four drain plugs.
Mercruiser drain plugs if you leave the plugs out there is no need for antifreeze but you still want to stabilize your fuel system properly.
Thread on the plug is 13.
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