The impeller could be so old that the vanes have taken a set and it takes
time for them to get the pressure up. It could also be that a majority of
the vanes have torn off already. Double check the belt tension too. It is
surprising just how little belt slip it takes for a diminished pump flow.
yes, its a 20GM or MG20. Fresh water cooled, uses anti freeze and a raw
water pump. I don't think 1 minute would hurt since there is water
circulating via the fresh water pump, but not sure how long the raw should
take to kick out water.
On Wed, Aug 10, 2016 at 9:08 PM, Josh Muckley via CnC-List
You have an inboard? Have you replaced the impeller? Having no other
details it doesn't a minute does not sound ridiculously long to wait. I
would keep an eye on it though and definitely replace the impeller if you
don't have a record of its last replacement.
Josh Muckley
S/V Sea Hawk
1989 C&C
orne Serpa
via CnC-List
Sent: Wednesday, August 10, 2016 19:56
To: cnc-list@cnc-list.com
Cc: Lorne Serpa
Subject: Stus-List How long before the raw water pump fuse water out the
tailpipe?
When I start my boat after it's been sitting for a few days it seems like it
takes maybe a minute b
When I start my boat after it's been sitting for a few days it seems like
it takes maybe a minute before the water comes out the tailpipe. How long
is reasonable to wait? I have no heating issues.
Lorne Serpa
C&C 30MKII 1988
Friendship, MD
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