"bpuharic" wrote in message
...
On Tue, 23 Mar 2010 21:18:49 -0400, "Eisboch" wrote:


"Tim" wrote in message
...

On Mar 23, 6:54 pm, bpuharic wrote:
On Tue, 23 Mar 2010 17:41:47 -0700 (PDT), Tim
wrote:



Bob, if you're running a raw water system I think I'd just the simple
stuff with the nylon mesh inside. My hoses on my 350 GM are common
from NAPA. even the ones that carry the water to the manifold risers.
Now from the manifolds to the outdrive or exhaust ports in the hull,
that might be a different issue that I have no knowledge of.

this is actually an inboard (surprising for a 27' boat, but it has a V
drive). the marina guy said i could probably get what i need at the
autoparts store, but i don't think they're actually any cheaper.

these hoses go from the risers to the muffler, then to the exhaust
ports.

Woah!. OK, thats for some interesting stuff!

Sounds like the type that was on the last boat I had and had to replace.
Big honking hoses.
The engines were the MercCruiser (GM) 454ci and the hoses that ran from
the
risers to the
mufflers were either 4" or 6" diameter. (can't remember). The boat yard
where I bought the
boat located and installed them. I never liked that boat. Sold it. Now
boatless. Miss the Navigator.

Eisboch


i didn't want to pull the hoses off the risers when i visited the boat
on saturday...so i measured the circumference.

calculated 3.88" diameter. from this i assume the ID was 3.5" with
about a 0.2" thick wall.

I've forgotten what size the ones I replaced were, but I am sure they were
quite a bit larger.
I seem to recall 6" diameter, but can't guaranty that. I know the boatyard
had to order
them special and they took a couple of weeks to get. They were not formed.

Eisboch