[C320-list] Change oil?

[Jeff Hare]

Regarding the impellers, for the first 3 or 4 years, I used to change mine every spring and keep the old ones as spares.  Overkill really, as I now have lots of spares so I do this only every 3rd year now depending on how much engine time I have.  But when removing them in the spring I did see that the blade that sat over the hump remained bent back after removal.  However, looking at all the removed spares I have, they all have straight fins, so that bend is only temporary and self-correcting.  There were a few years where I pulled the impeller in the fall.  I never saw a difference either way in performance, so I would think it matters how long you leave it like that.  Multiple years?  Probably an issue.  4-6mos?  Probably no issue at all.

As for the antifreeze hardening, I only have anecdotal evidence, but my experiences with RV Antifreeze doesn't seem to match the PS report, or at least not for the durations we're talking about.  All my old spares seem about as flexible as brand new ones with no signs of cracking.  Even the recent ones that have seen a couple winters in Antifreeze.  But that's not a scientific test, so whether it's a real problem for you maybe it falls into the category of "it depends".  We use the -60 RV antifreeze in the head and the rubber pump parts in the head are in great shape, with the pump operation smooth as silk.  If the RV Antifreeze were hardening rubber parts, I'm sure this would be trashed by now.  Nothing there has been replaced since the factory installed it and having a boat full of girls, it seems to get a lot of use.  :)

But... These are just my observations, not any scientific tests.

Cheers!
-Jeff Hare
#809



-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of jim brown
Sent: Saturday, October 4, 2014 4:08 PM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] Change oil?

I would agree but would not change the impeller until the spring after running the engine for a while. I worry about the antifreeze sitting there all year-Practical Sailor says either kind can harden and  damage the blades. A mechanic also told me that over the cold winter the blades can take a significant set leading to a less efficient pump. Not sure if either is true but just in case. 


Jim Brown  



________________________________
 From: "mcdonough5 at verizon.net" <mcdonough5 at verizon.net>
To: C320-List at catalina320.com 
Sent: Saturday, October 4, 2014 10:33 AM
Subject: Re: [C320-list] Change oil?
 

Thank you Doug and Karl. You confirm what I really knew I should do. I was 
just hoping that, welllll, maybe I could get away with it this year.

jack




-----Original Message----- 
From: Karl Krueger
Sent: Saturday, October 04, 2014 10:06 AM
To: C320-List at catalina320.com
Subject: Re: [C320-list] Change oil?

Jack:

My two cents, the answer would be yes.  The properties of oil decrease with
age and there for should be changed over time.  You either change your car
oil when you travel so many miles or with a certain amount of time.  Put
fresh oil inside the engine to coat the cyclindar walls for the winter.
Changing oil is much less expensive than having engine issues.

Smooth sailing from Milwaukee with 39 degrees and gale force winds on the
big pond (Lake Michigan)

Karl Krueger
Kindred Spirit #282

On Sat, Oct 4, 2014 at 8:38 AM, <mcdonough5 at verizon.net> wrote:

>
> After a season filled with repairs and maintenance and zero sailing, we’ve
> run our Yanmar (3GM30F) engine less than 15 hours total – and maybe not
> even that much.
>
> Considering that, is it still necessary to change the oil and filter for
> winter storage?
>
>
> Jack
> #947
>
>


-- 
Karl W Krueger - ABR, CRS, GRI
RE/MAX Realty 100
Phone - 414-322-6541
Fax - 414-327-6870