Make sure that when you remove the drain plug that the water drains and that the passage is not plugged with.
How many water drain plugs mercruiser 4 3.
I believe the motor is a gm.
If done with muffs and running the motor does this wet the impeller enough to not damage it from running dry.
It is equipped with four drain plugs.
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Locate all your engine s water drain plugs and hoses.
For stern drive and inboard engines such as mercruiser models the drain plugs are either brass or plastic.
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The 4 3 mercruiser engine is a popular inboard motor for boats.
Remove the drain plugs located on either side of the engine block.