Re: Mercury Mark 6 Water pump Woes

[Buccaneer]

Bill, thanks for your reply. When I tore apart my two Mark 6’s,
using the best parts to make one good one, I noticed that
on one unit the spring tension clip on the pump discharge cap
was missing. When putting everything back together, I used
the cap that had the clip, and installed the new seal in it.
When I tried to bolts the upper housing to the mid section
where the pump is, it would not mate together all the way,
and had about a 1/16" gap. Could not figure out why, so I ended
up removing the clip on the cap, and then the housings bolted
together tight. It appears that the cover plate would be tight
without the clip, but I’m glad you mentioned the clip, as that’s
one thing I can re-hash.
When I tested the pump in the bucket, all of the lower unit was
bolted together, and the water was over the pump area.
What’s a fast idle speed for an outboard? I wonder if my
heavy duty 1/2" drill spins fast enough for testing?
Thanks, Buccaneer

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