I have had much the same experience as Sebastien .I have replaced the
impellor every 3rd or 4th year in the spring on spec. I winterize with
antifreeze each Fall and then pack the impelor with petroleum jelly
which helps with the spring startup
On 19/10/2012 9:16 AM, Sébastien Lemieux wrote:
I don't have the experience of Rich but I would also lean in that
direction. I've changed mine for the first time this summer after 3
years. The impeller looked in perfect condition (no cracks and blades
were as flexible as a new one). I kept the old one as a spare and now
feel confident that I will only inspect the impeller every spring.
I've been told by a mechanic that if the raw water circuit is
winterized using antifreeze (vs. drained), the impeller holds up very
well. Since our impeller spends more than half the year in
antifreeze, this might explain the durability!
I also reasoned that since we sail on a lake with no commercial
traffic and never solo there is little risk in case I have to face an
impeller break down: I have a spare and tools on board, I know how to
swap them.
Sébastien Lemieux
Merlot X - C&C 30 mk2 1987
Mooney Bay - Lake Champlain
On Oct 18, 2012, at 21:28, Rich Knowles wrote:
I check mine each season's end when I winterize. If it looks good, it
goes back in. I have installed one new one in 15 years and that
includes several runs of a few minutes each year without water. They
are pretty durable. I check for cracking.
Rich Knowles
Indigo. LF38
Halifax
On 2012-10-18, at 22:04, Martin DeYoung <mdeyo...@deyoungmfg.com
<mailto:mdeyo...@deyoungmfg.com>> wrote:
...how often do you guys change the impeller in the raw water
pump?
I change Calypso's 4-108 raw water impeller at the start of each
season then put the lightly used old one in the spares box. It is
also my practice to check the impeller prior to setting off on a
longer trip where a sudden loss of cooling might be inconvenient.
There has been a year or so where I did not change the impeller in
the spring and the impeller perform fine with no significant change
in appearance.
I change the impeller after each time I forget to open the raw water
inlet thru hull valve and allowed the engine to run without cooling
water for more than a few minutes.
Martin
Calypso
1970 C&C 43
Seattle
-----Original Message-----
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of
Robert Abbott
Sent: Thursday, October 18, 2012 5:24 PM
To: cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>
Subject: Stus-List Miscellaneous
Because of excessive mussel growth on my prop and prop shaft the past
several seasons, this past Spring I tried something new, namely applying
"lanolin" to them....boat was hauled this week and I can report that the
lanolin was not very effective.....there were approx. 3 dozen mussels
attached to the prop and the prop shaft was covered as well.
On another note, applied Micron 66 antifouling paint to the boat this
past Spring (have been using Micron CSC for over 12
years).....absolutely no growth of any kind....and specifically no
'slime' which is common with the CSC.....the bottom looks like it did
when it was painted in the Spring and I only applied a very light coat
of the '66' (actually diluted it approx. 10%)....it is incredible
antifouling paint.....only regret is that it is not sold in Canada.
And, after 7 sailing seasons, I decided to check the air filter on the
Yanmar 2GMF.....took the cover off to discover there was no 'actual
filter' in the metal casing...ooops! There will be by next Spring.
Lastly, how often do you guys changedthe impeller in the raw water
pump? Not what the specs recommend but actually how often.....every
year, 2 years, 5 years, 10 years?
Bob Abbott
AZURA
C&C 32 - 84
Halifax, N.S.
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D.Drake 73 Jensen Healey C&C 26
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