Just speculating here, ...maybe it's the antifreeze that screws up the impellers! I don't put antifreeze through my raw water circuit ever, just drain it in the fall. my impeller has been in about 6 years and still looks like it will last another 6. sam :-)
On 2012-10-20, at 4:49 AM, "D.Drake" <d...@rogers.com> wrote: > 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> 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 >>> 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. >>> >>> >>> _______________________________________________ >>> This List is provided by the C&C Photo Album >>> http://www.cncphotoalbum.com >>> CnC-List@cnc-list.com >>> >>> _______________________________________________ >>> This List is provided by the C&C Photo Album >>> http://www.cncphotoalbum.com >>> CnC-List@cnc-list.com >>> >>> _______________________________________________ >>> This List is provided by the C&C Photo Album >>> http://www.cncphotoalbum.com >>> CnC-List@cnc-list.com >> >> >> >> _______________________________________________ >> This List is provided by the C&C Photo Album >> http://www.cncphotoalbum.com >> CnC-List@cnc-list.com > > -- > D.Drake 73 Jensen Healey C&C 26 > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com
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