It is equipped with four drain plugs.
Mercruiser 4 3 block drain plug.
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Remove the drain plugs located on either side.
The 4 3 mercruiser engine is a popular inboard motor for boats.
Remove the drain plugs located on either side of the engine block.
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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.
Make sure that when you remove the drain plug that the water drains and that the passage is not plugged with rust.
2006 mercruiser drain plug locations.
Thread on the plug is 13.
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