Quote:
Originally Posted by sailorboy1
BTW - those are bolts not screws
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Actually, I'm about 95% sure they are screws. Most
water pump covers are held on with fasteners that are fully threaded with Philips heads, and those are "machine screws."
I have seen some people differentiate between a machine screw and a machine bolt, or a machine bolt has a hex head.
If the water
pump fastener has a shank, and unthreaded part between the head and the threads, then it would indeed be a bolt.
Google "machine screw" and see if that looks like what holds your water pump cover on. Then see if you can find a Phillips head bolt.
And to the OP's question, on my last
boat I replaced the fasteners with SS Allen head, it was an almost impossible place to reach and the Allen head seemed to provide a more positive engagement when removing them. I haven't made the change on my
current boat yet, as it is easier to reach.