I have a 2006 205 Sport with a...

[llmatt]

I have a 2006 205 Sport with a 5.0 L MerCruiser Chevy engine that was purchased new.  Recently when we were just on the water I found that the engine had blown a drain plug out of the side of the engine block.  Obviously it was blowing water and the pump started pumping water out the side, or I wouldn't even have known the problem.  Since I didn't have any spare drain plugs, this ended our day.  After purchasing and installing the plug, everything is now fine and running smoothly.

My question is why it happened, and can I expect it to happen again?  I thought maybe since the plugs were plastic that they deteriorate over time and I should replace all of them.  Anyone else experience this or have any thoughts?

Thank you,

[Captain_Zero]

Yes they can deteriate overtime to some degree, but more likely was cross threaded at some point. I remove mine quite often when I flush and drain so I always keep new spares

[wingless]

My blue plastic Mercruiser raw water exhaust drain plug thumb screws are removed and replaced after every usage and have been holding up great over three years so far.

[Hugo]

Hi All,

 Where are the engine drain plugs on my 2002 220 bowrider 5.0 Mercruiser?

It's been a few years since I was on the forum, so I appreciate your help.