We had an issue too this year, first launch, as did another local boat.
Were told very common that the exhaust elbow will close up due to mineral
buildup. Apparently 3-5 year life. We took it off and cleared some crap
out with a screwdriver, put it back on and flow was back. We plan to
replace soon with a stainless steel copy of the Yanmar part, to see if it
lasts longer.
On May 30, 2018 11:08:48 Eric Frank via CnC-List <cnc-list@cnc-list.com> wrote:
Never had trouble with this before, but this year I could not get the raw
water going out the exhaust when I was getting ready for launching. Always
use a bucket of fresh water on the intake to the raw water pump (new
impeller every year) just to make sure things are working. Engine started
fine but no water out the exhaust. Impeller was turning when I cranked the
engine so thought the problem might be downstream of that. A mechanic at
the yard reported back that things were fine and he just had to run the
engine at a high RPM to get the raw water flowing. Anyone else experience
that? Does it suggest that the tubes where the raw water cools the engine
water could be getting clogged? Advice appreciated.
Eric Frank
Cat's Paw
C&C 35 Mk II
Mattapoisett, MA
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