I think you are right. Black pipe wrapped. There may have been an
(expensive) Yanmar mixing elbow in the mix originally, but you should have a
flange bolted to the exhaust manifold (I am speaking about my 2 cyl Yanmar)
which has threads for the pipe and is removed with four bolts. I have gone
through two broken 'mixing elbows' over the last 20 years. The rest is
available from a home improvement store. The 'elbow' has to be welded.
The fiberglass/asbestos(?) tape is available from Moyer Marine, the Atomic 4
specialists.
Gary
30-1
----- Original Message -----
From: "Allen White via CnC-List" <cnc-list@cnc-list.com>
To: <cnc-list@cnc-list.com>
Sent: Tuesday, September 23, 2014 8:31 AM
Subject: Re: Stus-List Wife doesn't like it when the boat leans ( sort of )
Since we had an amazing trip up the River on Saturday running with the
wind
for 4 hours, a great dinner, party at another club, walk the town and a
great breakfast, why beat into 14knts on the nose trying to make our way
back down the narrow river home? We'll just motor through the narrows,
drop
the hook for lunch and then sail the rest of the way ! About 2 hours into
the trip, she says " Why do I smell exhaust?" "Probably a wind eddy as we
are passing 30 feet from a highway bridge abutment". Not believing myself,
and noticing a change in the exhaust note, I pulled the companion way
steps
to have a look. Smoke, steam and water spraying all over the place. In a
surprisingly calm voice, she asks " Do we have a fire ?" No, just a
broken
exhaust. "What will we do ?" We are after all a sailboat, we'll sail !
Raised the sails, and beat the rest of the trip in short tacks home, where
several friendly members at our club were at the slip to help us in. First
time I sailed into the slip. Nice smooth landing, all well.
Now the point of the post: Yanmar SB 8 single. Is the exhaust just black
pipe wrapped with fiberglass tape ? It appears to be nothing more. I
don't
know what may have been done to her before I got her, but it looks like a
bushing, 3 inch nipple, 90, 3 inch nipple, 90, 1 1/2 inch nipple, y
adapter
for water outlet from top of engine, copper male to sweat fitting that is
clamped into exhaust hose to muffler. May be slightly different as it was
kind of dark last night while I was in there. Also any wisdom on getting
the
old pipe out of the top of the engine ?
Thanks,
Allen
Windfall '78 C&C 26
Poughkeepsie Yacht Club
Hudson River - Hyde Park, NY
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