Read an article recently on impellers looking perfectly fine, but the
"fins" had become detached from the hub. The drive pin did not go all
the way through the hub to the rubber fins so it allowed the hub to slip
inside the fins. So impeller may look absolutely fine,
but not fully functioning...food for thought when you check the impeller.
On 04/05/2015 10:20 PM, Joel Aronson via CnC-List wrote:
Impeller.
Joel
On Monday, May 4, 2015, Tom Buscaglia via CnC-List
<cnc-list@cnc-list.com <mailto: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
<http://www.sv-alera.com/>
--
Joel
301 541 8551
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Boat_Sig Cheers,
Jeff Nelson
Muir Caileag
C&C 30
Armdale Y.C.
Halifax
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