[C320-list] Perkins Perama M30 Overheating

[Jeffrey Brown]

It's does sound like an impeller issue. I change mine every two years, cheap and easy to replace. 

Jeff Brown
949-350-5123

> On Aug 26, 2017, at 6:18 AM, Timothy Woods <woodstimothya at gmail.com> wrote:
> 
> 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=
>> 
>>