[C320-list] Perkins Perama M30 Overheating

[Timothy Woods]

I had a similar problem with my last boat. It would overheat and when I
would restart it would cool back down. It drove me nuts for 6 months. It
end up being the raw water impeller rubber delaminented from the brass
bushing.

Tim

On Aug 26, 2017 12:54 AM, "Bev Wright" <bev.wright at verizon.net> wrote:

> Mark,
>
> Thanks for your post because, coincidentally, Whoosh #15 overheated on Wed
> night in Herring Bay/Chesapeake (opposite coast!) for the first time ever
> since I got her in 07/2014 and our boats are both 1993 vintage so I wonder
> if that's a sign of something?  I was motoring to the slip after engine had
> been running/idling for 90+ minutes (hanging out waiting for a race which
> didn't happen due to no wind) and noticed that temp was about 190° at 3000
> RPM. I throttled back to 2000 RPM and it cooled down immediately to normal
> 175°. I inched it back up to 2500 and it stayed at 175° for the remaining
> 20 min trip back to the slip. I had no smoke. Today I checked the strainer
> and it was clean. Oil, transmission fluid and coolant were OK and dry
> bilge. So, it's a mystery other than maybe she doesn't like to idle for
> that long. It was suggested that perhaps something was temporarily blocking
> the raw water intake. I will be cruising this weekend and will obviously
> keep an eye on it.
>
> Bev Wright
> s/v Whoosh #15
> Deale, MD
>
> -----Original Message-----
> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On
> Behalf Of Mark Cole
> Sent: Friday, August 25, 2017 11:25 PM
> To: C320-List at Catalina320.com
> Subject: [C320-list] Perkins Perama M30 Overheating
>
> My wife and I motored our boat over to a local boat yard for a haul-out
> yesterday.  About 20 minutes into the 1 hour trip, I noticed the water temp
> gauge was up to 220° and there was grey smoke (steam?) coming from the
> exhaust.  I shut the engine down and checked the raw water strainer.  There
> was a little gunk in the strainer, but not much.  Everything else looked
> OK, so I started the engine up again; there was cooling water coming out of
> the exhaust and water temp was back to normal.  We motored the rest of the
> way to the haul-out and the temp gauge stayed at 175° the whole way.  I
> went back to the boat this morning to start on the long list of stuff to
> do.  When I checked the bilge, there was maybe a gallon of water with
> antifreeze in the bilge.  I opened the heat exchanger on the engine,
> thinking it would be empty, but it was full.  When I dipped my finger in,
> it didn’t smell like antifreeze…  Is it possible that the heat exchanger
> burst when the water temperature went up?  Does that mean I could now have
> salt water in the engine block?  Anybody dealt with this before?
>
> Mark
> Fiddler’s Green, #8
> Tacoma, Washington=
>
>