Easy peasy and safe way for fresh water cooled engine in salt water. (Yanmar
3gm with Sendor after market radiator) I usually do this while in water
pending haul out. Close inlet seacock. Remove intake hose from water pump inlet
which is on top of engine. Insert new hose into inlet fitting. Other end of
hose (cut end at 45 degree angle) into bucket of fresh water with garden hose
with shut off nozzle. Start engine which will suck fresh water. Slightly open
hose nozzle so bucket maintains constant level. Run engine at faster idle for
a few minutes to thoroughly rinse out all salt residue and minimize residual
water in muffler. Open gallon jug of RV antifreeze (I use the -100 degree
stuff just for extra measure) Remove hose from bucket insert in antifreeze.
Suck a gallon. Shut off engine just before use up all of antifreeze so liquid
remains in pump and impeller doesn’t dry out. Open seacock, drain residual
water. Remove strainer top or body to clean. Reattach cooling line to pump
inlet. Done. Has worked flawlessly for over 40 years.
John Read
Legacy III
1982 C&C 34
Noank, CT
From: CHARLES SCHEAFFER via CnC-List
Sent: Wednesday, March 05, 2025 4:07 PM
To: Stus-List <cnc-list@cnc-list.com>
Cc: CHARLES SCHEAFFER <cscheaf...@comcast.net>
Subject: Stus-List Re: Seacock Tee for winterizing the engine
Stuffing a hose into the inlet works on the hard, but not when the boat's
afloat. I also don't like to tie up another person for such a mundane task.
The seacock tee idea came from Don Casey and makes it a quick and easy one man
operation. I usually have four gallons of pink stuff in a five gallon bucket
and run a few gallons through before shutting down. I don't like to waste it
or pollute, so I hang another bucket near the exhaust outlet and watch the
exhaust water color change from clear, to light pink when I swing the bucket to
catch the strong bright pink, before shutting down. That uses a few gallons,
but I'm certain it gets everywhere and I capture the last gallon and use it
inside for the sink traps & drains and ice box drain, etc.
I added a tee to the thruhull for the air conditioner intake and use the same
bucket and hose and similar method. I can run the air conditioner pump without
running the compressor.
Chuck S
On 03/04/2025 2:52 PM EST Firewater via CnC-List <cnc-list@cnc-list.com
<mailto:cnc-list@cnc-list.com> > wrote:
It takes a 2nd person, but our method is extremely simple. Our boat came with
a length of hose where one end has several wraps of rigging tape. This fits
snugly in the thru-hull and we just put the hose into the jug and suck the
antifreeze directly into the engine. No tools required.
Jim Reinardy
C&C 30-2 “Firewater”
Milwaukee, WI
Sent from my iPad
On Mar 4, 2025, at 10:48 AM, David Knecht via CnC-List <cnc-list@cnc-list.com
<mailto:cnc-list@cnc-list.com> > wrote:
There was a prior discussion regarding winterizing the engine where someone
described converting the engine raw water seacock into a Tee-fitting so that
antifreeze could be run into the engine to winterize the boat. This would
allow the process without having to remove the hose from the raw water strainer
or the seacock. I can't find that email anywhere so I am wondering if anyone
has notes on how this was done. I presume you would use a standard brass Tee
fitting, adapters (all the ones I have found have female threads so require an
adapter to add to the seacock) and two shutoff levers, one for each water path.
Thanks- Dave
S/V Aries
1990 C&C 34+
New London, CT
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it active. Please help by making a small contribution using PayPal at:
https://www.paypal.com/paypalme/stumurray All contributions are greatly
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