Also check the mixing elbow-crap will block flow out of back side of heat
exchanger.......
Kim Brown
TrustMe!!! 35-3
Message: 14
Date: Tue, 05 May 2015 07:49:11 -0400
From: Robert Boyer <dainyr...@icloud.com>
To: Tom Buscaglia <t...@sv-alera.com>, "cnc-list@cnc-list.com"
<cnc-list@cnc-list.com>
Subject: Re: Stus-List Overheating as high RPM only
Message-ID: <691a0ca5-29ae-4030-97d7-0bbe95a58...@icloud.com>
Content-Type: text/plain; charset="us-ascii"
Maybe one or two blades of the pump's impeller are worn off so that the pump
supplies enough cooling water up to a point. I would check the impeller
next.
Bob Boyer
S/V Rainy Days / Annapolis MD
1983 C&C Landfall 38 - Hull #230
email: dainyr...@icloud.com
blog: dainyrays.blogspot.com
"There is nothing--absolutely nothing--half so much worth doing as simply
messing about in boats." --Kenneth Grahame
> On May 4, 2015, at 9:19 PM, Tom Buscaglia via CnC-List
<cnc-list@cnc-list.com> wrote:
>
> We did a run last weekend to a local harbor for the weekend. Wind was
fluky and it was a short trip so we were motoring. Alera has a Yanmar 3HM35
with around 700 original hours and was running fine at our usual cruising
RPM of 26-2800 on the tach. The hot alarm went off and I let her cool down
and then ran at a lower ROM (1800 or so) and no more alarms. When I got to
our destination, I cleaned out the raw water trap as it was pretty crapped
up. On the way back the alarm went off again but this time all I had to do
was throttle back to around 2200 and it was fine. Much less steam/smoke
that on the way out.
>
> Today I checked the fan belt on the pump and it was a little loose so I
tightened that. I'll be getting her hauled next week for a pressure wash,
prop grease and zinc replacement, and will check the intake then.
>
> Aside from the intake, belt and crap trap, anything else I should check?
>
> Tom B
> Tom Buscaglia
> SV Alera
> 1990 C&C 37+/40
> Vashon Island WA
> (206) 463-9200
> www.sv-alera.com
>
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>
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