Re: BOLT head in the Bilge...
It is something you need to fix, sooner rather than later. Each time you start the motor it is going to flex that mount, and with only one bolt holding it if it breaks the whole motor will be useless, plus if it shifts because it broke you could bend or break other parts. If you are lucky you might be able to use a screw extractor to get it out. Put a lot of penetrating oil on it first and let it work. then drill a small hole for the extractor too bite into. It should just back out. If that doesn't work then you will need to drill out the bolt and re tap the hole.