"Steve M" wrote in message
. 254.210...
".JIMinMA." wrote in
:

Steve M wrote:

I have a Sundancer 290 with the 7.4L Merc, and I have a small
water leak in the engine compartment. When the boat sits
for a while (days), there is no leaking, but when I take
it out for a spin, it's dripping when I come back. The
dripping is coming from somewhere directly under the
hub, but I can't see up under there to see exactly where
it's coming from. The risers go down into that area,
but the water that's dripping is not warm, so I don't
think it's coming from the risers. What's up under
there that could be leaking? Any ideas/suggestions?

Thanks!

Steve

You need to be a bit more descriptive. What is a "hub"? What do you have
for a drive train? Is it an IO or inboard? Straight transmission or V
drive. Alpha, Bravo, or TRS? Would you be able to get a better look at
things if you used a mirror and high power flashlight?
Jim




The hub, or coupler, is the rubber donut-shaped thing that connects the
outdrive shaft to the engine.

I have an I/O 7.4L Merc with a Bravo I outdrive.

I didn't have a mirror with me, but that would be worth a try.

Steve


You say it leaks only when the engine is running, and that the drips are
cool. That eliminates everything on the transom except the sea water pickup
fitting and hose. Also check the connections between the risers and
bullhorn. there may be an oil cooler mounted high on the back of the engine.
If so check that. Check the heat exchanger if you have one. look at the
hoses between the thermostat housing and risers. look at the connections
between the risers and manifolds. Look at the thermostat housing. Look at
the engine circulating pump. Be careful of the spinning belts and pulleys.
They'll bite you if they can.
Jim