Cruisers Forum

Thread Tools Search this Thread Rate Thread Display Modes
Old 29-07-2021, 04:40   #1
Registered User

Join Date: Feb 2019
Posts: 1
Cool running Universal 5411

Hi everyone; Ericson 28+ (first season that I have the boat) here with the 5411 direct raw water cooled. Engine runs fine, but cold; turns out that the previous owner had completely closed (shut off valve) the return and so the thermostat was never recirculating to get the temp up. Engine temps were around 100F (but again, running smoothly, no issues). When I opened the return and replaced the thermostat (also replaced the raw water pump) the engine comes up nicely to 140-150F and stays there, so all good. Just that it seems that even at full speed there is some recirculation needed to keep the engine temp up, which in turn reduces the water flow into the exhaust, with the result that quite a bit of steam is generated out the exhaust (and the exhaust water is on the warmer side). Anybody have any idea what is going on? - if I restrict the return I get the exhaust to stop steaming, but then the engine temp drops. If I run the engine temps at the correct temp I get steam. Almost looks to me like the cooling system is overdimensioned for the engine?
Thanks for any advice ...
E28+, Maine.
Alsail27 is offline   Reply With Quote
Old 29-07-2021, 04:52   #2
Senior Cruiser
tkeithlu's Avatar

Cruisers Forum Supporter

Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 3,705
Re: Cool running Universal 5411

Without getting too deeply into it, it sounds like you've got a 140 F thermostat when a 165 F would be better. The thermostat should control the steady state temperature with the available water flow fully open.
Never let anything mechanical know that you are in a hurry.
tkeithlu is online now   Reply With Quote
Old 29-07-2021, 05:20   #3
Senior Cruiser
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 43,322
Images: 241
Re: Cool running Universal 5411

Greetings and welcome aboard the CF, Alex.

Evidently, the Seawater Cooled engine uses a 7 PSI CAP.

Service Manual ➥
Parts Manual ➥

See page 31: Thermostat Assembly, Part #299624
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 online now   Reply With Quote
Old 29-07-2021, 05:41   #4
Registered User

Join Date: Aug 2016
Location: Long Island, NY
Boat: Cal 33-2
Posts: 304
Re: Cool running Universal 5411

I had a 5411 jn my previous boat which I owned for 20 years. Yes the 140F thermostat is correct. This is a raw water cooled engine and a higher temp would greatly increased scaling in the cooling passages if in salt water. DO NOT install a 165F or higher temp thermostat unless you convert to fresh water cooling (actually not a bad idea).

Sounds like you understand how the 5411 cooling water recirculation system works. I would get some water vapor (not really steam!) in the spring when the water was cold. As long as the engine is not overheating and the coolong water temp is at 140F, I would not worry about a bit of water vapor. At low loads, only a small amount of cooling water gets delivered to the exhaust as most is recirculated.

On an unrelated issue, the 5411 has the common Universal issue of having "trailer" connectors which are known for causing electrical problems. If they are still there, think strongly about replacing them.
S/V First Tracks
1985 Cal 33-2
JimsCAL is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Universal 5411 Exhaust Flange Search Chief Engineer Engines and Propulsion Systems 17 27-10-2019 15:42
Universal 5411 - Cooling System Failure and Fresh Water Conversion pmeyer Engines and Propulsion Systems 2 02-05-2015 06:35
Universal 5411 Garrett Engines and Propulsion Systems 10 09-05-2010 16:04
Universal 5411 Oil Leak Andy and Mara Engines and Propulsion Systems 2 19-11-2009 09:19
Universal 5411 - stuck coupler on propshaft Richhh Engines and Propulsion Systems 2 17-04-2006 12:08

Advertise Here

All times are GMT -7. The time now is 04:13.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.