Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 14-04-2021, 13:48   #1
Registered User

Join Date: Oct 2018
Location: Daytona Beach
Boat: Gulfstar, Hirsch, 45'
Posts: 166
1985 Perkins 4.108 - Gulfstar

I have a technical question that I simply cannot figure out. Our engine alarm will not stop blaring at the helm as long as the engine runs, for 1 min or 15 hours. When we start our engine, it runs great, no smoke, or trouble starting, no overheating, or under pressure issues, oil and water (cooling) are fine.

We installed a new alternator as the older one had a voltage regulator that was Kaput.... so the 65 Amp alternator is brand new and putting out 14.5 volts. The issue with the alarm started before replacing the alternator. It does have a small diode that comes off of the alternator, but the electronics shop tested it and said it was "fine" (no open circuit)

Any thoughts on where I should look? Any help is greatly appreciated

Mark
Rubicon King is offline   Reply With Quote
Old 14-04-2021, 13:54   #2
Registered User
 
Marathon1150's Avatar

Join Date: Jan 2012
Location: Vancouver, Canada; Papeete, Tahiti
Boat: Beneteau Idylle 1150 (Papeete), Beneteau First 35s5 (Vancouver)
Posts: 395
Images: 11
Re: 1985 Perkins 4.108 - Gulfstar

The oil pressure sensor on our 4.108 failed and resulted in a continuous alarm. You might want to check the wiring to the senor and the sensor itself.

Good luck. It must be seriously annoying to have the alarm sounding continuously!
__________________
Desolation Island is situated in a third region, somewhere between elsewhere and everywhere.
Jean-Paul Kauffmann
Marathon1150 is offline   Reply With Quote
Old 17-04-2021, 16:53   #3
Senior Cruiser
 
tkeithlu's Avatar

Cruisers Forum Supporter

Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 3,195
Re: 1985 Perkins 4.108 - Gulfstar

Your engine alarm is likely to be either (or both) a over heat sensor (switch that closes at a fixed temperature) or an oil pressure sensor (only opens with a set minimal oil pressure). Both are pretty obvious on the engine, and are readily available at any ol' auto supply. You would normally expect the oil pressure alarm to sound when you turned the ignition on (supplied it power, and it's closed because there is no oil pressure. It should stop shortly after the engine starts and oil pressure goes up. The temperature sensor you shgould not hear from unless you run out of coolant or otherwise seriously overheat the engine.

So, it likely is the oil sensor that is bad. Take it to an auto shop and get one like it. It looks like this:

https://www.google.com/search?q=oil+...hrome&ie=UTF-8
__________________
Never let anything mechanical know that you are in a hurry.
tkeithlu is offline   Reply With Quote
Old 18-04-2021, 12:17   #4
Registered User

Join Date: Oct 2018
Location: Daytona Beach
Boat: Gulfstar, Hirsch, 45'
Posts: 166
Re: 1985 Perkins 4.108 - Gulfstar

Th is for the replies. Im headed t on the boat on sat and will quickly check the oil pressure sending unit on the port side.
Rubicon King is offline   Reply With Quote
Reply

Tags
gulfstar, perkins

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
[SOLD] 1985 Bluewater Gulfstar 50 Sailmaster Cutter - $79,000 Chotu Boats For Sale and Wanted 65 02-08-2020 10:46
Owner manual for 1985 Hirsch Gulfstar 45' Camelot 2 Monohull Sailboats 1 07-01-2019 12:56
Perkins 4-108 vs Westerbeke 4-108 world spectator Engines and Propulsion Systems 14 15-08-2010 17:33
Gulfstar Water Heater Install and 4-108 Fuel Filter jimisbell Construction, Maintenance & Refit 3 29-10-2009 18:50

Advertise Here


All times are GMT -7. The time now is 09:16.


Google+
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.