I replaced my mixing elbow several years ago on my Yanmar 2 GMF which
was not a fun task. The mixing elbow was attached to (threaded into)
the exhaust flange and both had to be removed. The mixing elbow could
not be rotated to be removed while the exhaust flange was attached to
the engine with four (4) long bolts.
Once both were removed, the job of separating the mixing elbow from the
exhaust flange was relatively easy.....put the exhaust flange in a large
vice and unscrewed the mixing elbow.
Screwed the new mixing elbow to the exhaust flange and was ready to put
them back on the engine. Sounds easy but not so much. Both together
were heavy and working in the engine compartment with virtually one hand
(left hand and I am right handed) was a challenge.
In order to place the 2 components back onto the engine I got two (2)
identical bolts to the four (4) and cut the heads of....I screwed the
two (2) bolts diagonally into the side of the engine...I was then able
to slide the combined mixing elbow/exhaust flange onto the two (2) bolts
as the heads were removed.
It was then a matter of screwing 2 of the 4 original bolts into place,
unscrewing the 2 duds and inserting the remaining original 2 bolts.
If the job was done on a work bench, it would be no big deal but doing
it in the engine compartment lying on your side was a challenge I would
not to repeat.
Rob Abbott
AZURA
C&C 32 - #277
Halifax, N.S.
On 2023-07-16 10:29 p.m., ALAN BERGEN via CnC-List wrote:
I replaced mine after discovering a pinhole in the mixing elbow. It
was corroded so badly that I couldn't remove it from the piece it was
attached to, even heating it with a torch and using a five foot piece
of pipe on a wrench for leverage. I removed both pieces together
(easy) and replaced them with cast iron items. I was able to salvage
the nipple.
Alan Bergen
35 Mk III Thirsty
Rose City YC
Portland, OR
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