[C320-list] Perkins Perama M30 Overheating

[Bev Wright]

Ps, we have been motoring 2000-3000 for 90 min and temp is fine. I can only hope that it was an obstruction that cleared itself.

⁣Sent from TypeApp ​

On Aug 26, 2017, 1:07 PM, at 1:07 PM, Bev Wright <bev.wright at verizon.net> wrote:
>for me, it shouldn't be the impeller because i just had it changed in
>July. 
>
>⁣Sent from TypeApp ​
>
>On Aug 26, 2017, 12:42 PM, at 12:42 PM, Jeffrey Brown
><oceanblues at mac.com> wrote:
>>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=
>>>> 
>>>>