Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 21-09-2019, 04:18   #1
Registered User

Join Date: Nov 2016
Posts: 11
Yanmar 3GM30F intermittent oil pressure alarm

We are heading back from Florida to New Orleans in pretty rolly 6ft seas. We’ve been running about 2800 for 8 hours, then dropped to 2200. The alarm chirps as we come off waves and roll to port. It will hold for up to 2-3 seconds.

1) is this a concern worthy of shutting down?

2) is this just a hot or faulty sensor?

3) is the oil sloshing around causing a problem with the actual oil pressure?

We’ve got 36 hours to go....thoughts are much appreciated.
__________________

jwillis22 is offline   Reply With Quote
Old 21-09-2019, 05:26   #2
Registered User

Join Date: Nov 2014
Posts: 1,006
Re: Yanmar 3GM30F intermittent oil pressure alarm

It could be a little of all three....

Can you run off downwind or heave to for a few moments and check the oil level? It could be a bit low causing an oil pickup problem when the boat rolls.

DougR
__________________

DougR is offline   Reply With Quote
Old 21-09-2019, 07:37   #3
Registered User

Join Date: Nov 2016
Posts: 11
Re: Yanmar 3GM30F intermittent oil pressure alarm

Resolved:

1) We’re rolling along under sail at 7 knots.
2) The oil pump is on the starboard side of the engine. When we rolled to port, the pump was starved.
3) checking the level was useless. Since the oil was sloshing around.

4:::: Added 1/2 quart fixed it all. But now we don’t need the damn things haha.

Thanks.
jwillis22 is offline   Reply With Quote
Old 21-09-2019, 16:58   #4
Registered User

Join Date: Feb 2010
Posts: 210
Re: Yanmar 3GM30F intermittent oil pressure alarm

Quote:
Originally Posted by jwillis22 View Post
Resolved:

1) We’re rolling along under sail at 7 knots.
2) The oil pump is on the starboard side of the engine. When we rolled to port, the pump was starved.
3) checking the level was useless. Since the oil was sloshing around.

4:::: Added 1/2 quart fixed it all. But now we don’t need the damn things haha.

Thanks.


I'm happy to hear that you found the cause of the low oil pressure warning but if you're right then you came dangerously close to a major crankshaft seizure, that oil pickup sits remarkably close to the bottom of the oil pan and the engine must have been almost completely out of oil.
The oil pickup and screen when installed correctly is about in the geometric centre of the oil pan, not to one side.
Now would be a good time to do an oil and filter change.
skipperpete is offline   Reply With Quote
Old 21-09-2019, 19:45   #5
Registered User

Join Date: Apr 2007
Location: Australia
Boat: Island Packet 40
Posts: 2,883
Images: 7
Re: Yanmar 3GM30F intermittent oil pressure alarm

I have a vague recollection that both a shallow and a deep oil pan are available for these engines. Might be worth checking.
RaymondR is offline   Reply With Quote
Old 22-09-2019, 21:05   #6
Marine Service Provider

Join Date: Jan 2012
Location: Lake Ontario
Boat: Douglas 32 Mk II
Posts: 2,834
Re: Yanmar 3GM30F intermittent oil pressure alarm

Quote:
Originally Posted by jwillis22 View Post
We are heading back from Florida to New Orleans in pretty rolly 6ft seas. We’ve been running about 2800 for 8 hours, then dropped to 2200. The alarm chirps as we come off waves and roll to port. It will hold for up to 2-3 seconds.

1) is this a concern worthy of shutting down?

2) is this just a hot or faulty sensor?

3) is the oil sloshing around causing a problem with the actual oil pressure?

We’ve got 36 hours to go....thoughts are much appreciated.
Shouldn’t run engine if heeled more than 15 degrees.
ramblinrod is offline   Reply With Quote
Old 22-09-2019, 21:07   #7
Marine Service Provider

Join Date: Jan 2012
Location: Lake Ontario
Boat: Douglas 32 Mk II
Posts: 2,834
Re: Yanmar 3GM30F intermittent oil pressure alarm

Did you reduce throttle to drop rpm?

If the engine lost 600 rpm on its own because it was starved of lubrication that is really not cool.
__________________

ramblinrod is offline   Reply With Quote
Reply

Tags
3gm, 3gm30, alarm, oil, yanmar

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
Oil pressure gauge intermittent readings Ketchgould Electrical: Batteries, Generators & Solar 1 03-05-2015 07:38
Intermittent oil pressure reading Ketchgould Engines and Propulsion Systems 0 02-05-2015 06:29
3GM30F Intermittent power loss ScuzzMonkey Engines and Propulsion Systems 10 15-08-2013 18:12
Yanmar 3GM30F Rebuild Rookie - no oil pressure garymcg Engines and Propulsion Systems 12 23-11-2012 17:05
Yanmar 3YM20 Oil Pressure Alarm with B Engine Panel Capitain Mike Electrical: Batteries, Generators & Solar 5 23-07-2011 15:15

Advertise Here


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 13:48.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×

ShowCase vBulletin Plugins by Drive Thru Online, Inc.