Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 04-09-2012, 07:06   #1
Registered User

Join Date: Mar 2012
Posts: 11
Perkins 6.354 Thermostat

My question is do Perkins 6.354 marine diesels have thermostat? My engine runs at 65 Deg C on the gauge, which I consider a bit cool. I have yet to confirm the gauge is correct but assuming it is I wondered about fitting / checking the thermostat. If so where is it located? I cant see one in the manual I have, which is far from comprehensive.

The engine has the normal heat exchange system with external supply cooling the gearbox and engine oil, the header tank/heat exchanger before exiting via the exhaust manifold, so I assume its standard in its plumbing arrangement.

Thoughts on the operating temp and need for a thermostat?

Engine revs are not at max and probably below normal cruise. I am not sure exactly how many rpm as my tacho cable has been broken since I have owned the boat. A replacement cable is now just days away.

Thanks,

Martin
__________________

__________________
mrh123 is offline   Reply With Quote
Old 04-09-2012, 07:47   #2
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,592
Images: 240
Re: Perkins 6.354 Thermostat

Greetings and welcome aboard the CF, Martin.
__________________

__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 04-09-2012, 09:17   #3
Registered User
 
The Blue Heron's Avatar

Join Date: Jul 2012
Location: Pensacola Fl
Boat: Heritage East 40
Posts: 199
Re: Perkins 6.354 Thermostat

Hello Martin. Yes they have thermostats. Two near the front of the manicooler above the waterpump.
That is a bit too cool for the engine. At 1300 RPM's I am at 185F on my perkins.

Is your turbo or N/A?
The Blue Heron is offline   Reply With Quote
Old 04-09-2012, 16:06   #4
Registered User

Join Date: Mar 2012
Posts: 11
Its a N/A engine. I quite like simple, especially when it comes to boat engines. I am surprised there are two thermostats. Does that mean one for the engine coolent and one for the external supply or are the two or the engine coolant only?
__________________
mrh123 is offline   Reply With Quote
Old 04-09-2012, 16:17   #5
Registered User

Join Date: Mar 2012
Posts: 11
Sorry, hit send while trying to correct my typos. Do you mean above the engine coolant circulation water pump or the external water supply pump? I am unable to see any indication of its location in the documentation I have (I am sure I need to find a better manual), nor do I know its specifications other than the temperature range. I believe we have a Perkins distributor down here in Perth, but I am unsure how useful/helpful they will be with an old marine engine.
__________________
mrh123 is offline   Reply With Quote
Old 04-09-2012, 20:14   #6
Registered User

Join Date: Jul 2012
Location: Auckland New Zealand
Boat: Farr 1020
Posts: 101
Re: Perkins 6.354 Thermostat

Martin
A running temp of 65 C is within the normal temp range for a marine diesel. My manual states range as 50C - 75C with the thermostat to be fully open at 80C.

Acushla
__________________
Acushla is offline   Reply With Quote
Old 05-09-2012, 16:13   #7
Registered User
 
The Blue Heron's Avatar

Join Date: Jul 2012
Location: Pensacola Fl
Boat: Heritage East 40
Posts: 199
Oops sorry I didn't see it was Celsius. Yes your temps are good. Check your impeller.
The Blue Heron is offline   Reply With Quote
Old 08-09-2012, 22:42   #8
Registered User

Join Date: Mar 2012
Posts: 11
Update. With my newly acquired tacho cable - thanks to the good work by the guys at Flexible Drive Agencies, who used some of my old fittings to rebuild me a new cable - I can now see I am pottering around at 1500 rpm with a temp of 65 deg C, doing 6.4 knots. If I up the rpm to 2000 the temperature comes up to a much more likable 80 deg C and settles there. We are now doing just under 8 knots.

So looking at the temperature change, I am guessing I dont even have a thermostat installed as my web research seems to indicate the correct one opens at 78 deg C. I also wonder if the extended running at the lower rpm and cooler temperature could have glazed the bores or it she still working hard enough even at that low load not to glaze up? I did note at 2000 rpm she was putting out a fair bit of black exhaust....not at all what I would call excessive, just what you would expect at the higher work load.

I believe maximum rated continuous rpm for my engine is 2400. Is that correct? Should the exhaust look darker at that sort of load or am I pushing her too hard? It might well be time for an injector service.

Thanks for you input,

Martin
__________________
mrh123 is offline   Reply With Quote
Old 08-09-2012, 23:14   #9
Registered User

Join Date: Nov 2011
Location: Montegut LA.
Boat: Now we need to get her to Louisiana !! she's ours
Posts: 3,421
Re: Perkins 6.354 Thermostat

Ive always run my perkins at 1800 to 1850 for max. But I see that others use higher rpms then that ! 1600 rpms should not glaze the cyls! My best fuel mileage was at 1650 in our Colvin. Ran it there for 7800 hours before we did anything major to it !
__________________
Bob and Connie
bobconnie is offline   Reply With Quote
Old 09-09-2012, 18:40   #10
Registered User

Join Date: Jul 2012
Location: Auckland New Zealand
Boat: Farr 1020
Posts: 101
Re: Perkins 6.354 Thermostat

Martin
It depends on the size of the prop that you are running as to whether you are overloading the engine. Once the exhaust starts to turn smoky black then you are overloading the engine. I wouldn't have said that you have no thermostat fitted, the temps you quote would appear in line with a thermostatically controlled engine.
I would continue to operate the engine at a speed and load that does not cause black smoke but at provides best hull speed for a while to see how it all settles down.
You would need to reduce prop pitch and/or diameter to get the revs up to optimum engine speed and at the same time give optimum hull speed.

Acushla
__________________
Acushla is offline   Reply With Quote
Old 10-09-2012, 04:27   #11
Registered User
 
The Blue Heron's Avatar

Join Date: Jul 2012
Location: Pensacola Fl
Boat: Heritage East 40
Posts: 199
I ran my Trawler yesterday my 6.354 Perkins ran at Max Rpm of 2600. I observed 10.8 kts and temp was 198 f

If that helps.
The Blue Heron is offline   Reply With Quote
Old 10-09-2012, 04:29   #12
Registered User
 
The Blue Heron's Avatar

Join Date: Jul 2012
Location: Pensacola Fl
Boat: Heritage East 40
Posts: 199
My manual states max continues is 2400. I found the sweet spot at 1700 rpm.
The Blue Heron is offline   Reply With Quote
Old 09-10-2012, 17:02   #13
Registered User

Join Date: Oct 2012
Posts: 1
Re: Perkins 6.354 Thermostat

...Perkins and suppliers tell us this engine is obsolete... no parts available.

Does anyone know of a parts supplier for this engine? Simpler parts like thermostats, impellers, and the like?
__________________
red doc is offline   Reply With Quote
Old 10-10-2012, 01:44   #14
Registered User

Join Date: Oct 2009
Location: australia
Posts: 467
Re: Perkins 6.354 Thermostat

G'day Red Dot,
This a w.w.w. forum where are you ? May be able to help.
__________________
shakey doug is offline   Reply With Quote
Old 10-10-2012, 03:05   #15
Registered User

Join Date: Jun 2012
Posts: 19
Re: Perkins 6.354 Thermostat

Quote:
Originally Posted by red doc View Post
...Perkins and suppliers tell us this engine is obsolete... no parts available.

Does anyone know of a parts supplier for this engine? Simpler parts like thermostats, impellers, and the like?
Parts are available all over the world. Perkins is Massey-Ferguson tractor. The brand is now owned by Agco. Go to AGCO Parts | Tractors | Perkins Engine Parts

I own a 6.354 in a farm tractor. Never have a problem getting parts. For raw water pump impeller, order the part by the brand of the pump. Heat exchanger the same. Nearly everything else, including a complete rebuilt engine is available from your local MF farm machinery dealer.
__________________

__________________
Heritage is offline   Reply With Quote
Reply

Tags
perkins

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 19:02.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.