Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-09-2018, 01:18 PM   #1
Senior Member
 
Restitution's Avatar
 
City: Kalama, WA
Vessel Name: "Restitution"
Vessel Model: 38' Californian
Join Date: Mar 2012
Posts: 200
Farymann genset oil pressure problem

Our Farymann genny will run for 30 minutes, the shut down. It is not temperature related, but oil pressure. Engine starts well. Oil pressure is at 40psi. Gradually over a half an hour, oil pressure dips below 20psi. Once down to 14 psi, the oil pressure safety switch engages and rightfully, the engine shuts down. I tried 50 weight oil in lieu of prescribed 15w40. Same thing happens. Oil level on dipstick is between full and low mark. Ive read where near full oil quantity may cause foam and low oil pressure. My next step is to reduce oil to low mark and see what happens. Oddly, the instructions say that engine runs best if oil is not topped off to full. Using high zinc oil. Do any of you men have some insight into this problem?

Thanks

Sam Nigro
Attached Thumbnails
F610D884-6C72-40F4-BD9C-7F2567AA8F6B.jpg  
Restitution is offline   Reply With Quote
Old 02-09-2018, 01:32 PM   #2
Guru
 
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
Try blowing out the oil passages with the gauge out while cranking the engine..
bayview is offline   Reply With Quote
Old 02-09-2018, 01:36 PM   #3
Guru
 
diver dave's Avatar
 
City: Palm Coast, FL
Vessel Name: Coquina
Vessel Model: Lagoon 380
Join Date: Jan 2017
Posts: 2,116
is the genset fairly level?
how does the oil on the dipstick look, foamy?
Is this a new problem?
Is the dipstick original?
Has a new oil filter been tried?

If all that looks good, then we might have to consider a plugged oil pump screen.
diver dave is offline   Reply With Quote
Old 02-09-2018, 01:48 PM   #4
Guru
 
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
Sometimes there is a pressure control spring that is accessible without dropping the pan. cleaning or replacing that might help. Changing the filter is a good idea.
bayview is offline   Reply With Quote
Old 02-09-2018, 01:55 PM   #5
Guru
 
kchace's Avatar
 
City: Brookline, NH
Vessel Name: Blue Heaven
Vessel Model: Albin 43 classic double cabin, twin 135 Lehmans
Join Date: Sep 2013
Posts: 2,070
First thing is to verify that the oil pressure is in fact falling that low. It could be a sensor problem. Install a mechanical oil pressure gauge ON the generator and see if it agrees.
kchace is offline   Reply With Quote
Old 02-09-2018, 02:23 PM   #6
Guru
 
timb's Avatar
 
City: Oriental N.C.
Vessel Name: true heading
Vessel Model: marine trader 38 dc
Join Date: Sep 2017
Posts: 565
I have one like that I think there is an oil strainer do you have a MANUAL . I have not ran mine much the surveyor said it didn't have any oil in it .I may have a pdf of the shop manual .I going to try to bring mine home next weekend .is yours on a dynamica gen set
timb is offline   Reply With Quote
Old 02-09-2018, 03:10 PM   #7
Technical Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 6,166
Shoot lower part of engine crankcase with an IR gun. See how hot oil is getting. I don't know what is normal for that thing, would not expect it to go over 180F.

Look in the manual for what is normal oil pressure. Some little engines lower oil pressure is normal.
Ski in NC is offline   Reply With Quote
Old 02-09-2018, 04:01 PM   #8
Guru
 
timb's Avatar
 
City: Oriental N.C.
Vessel Name: true heading
Vessel Model: marine trader 38 dc
Join Date: Sep 2017
Posts: 565
3. Oil pressure check The oil pressure depends mostly on the wearing conditions of the bearings. Before checking the oil pressure make sure that the oil level is topped and oil with correct viscosity is used. Remove the oil channel plug screw and connect oil pressure gauge with adaptor. Oil pressure values, hot engine ): Idle speed => min press. 0,5 bar ( 7 PSI ) Nominal speed => min press. 1,8 bar ( 23 PSI ) If oil pressure is to low first check the pressure relief valve before starting further dismantling of the engine.
15/18W engines : Plug screw located on crankcase side.
timb is offline   Reply With Quote
Old 02-09-2018, 06:22 PM   #9
Guru
 
BruceK's Avatar
 
City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 11,655
Oil pressure can be high while the oil is cold and thick and reduce as the
oil heats and thins. It could be a worn engine. Is it using oil?
__________________
BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
BruceK is offline   Reply With Quote
Old 02-11-2018, 10:55 PM   #10
Senior Member
 
Restitution's Avatar
 
City: Kalama, WA
Vessel Name: "Restitution"
Vessel Model: 38' Californian
Join Date: Mar 2012
Posts: 200
All good questions. Crankcase temp is 145. I’ve cleaned the screen strainer, to no avail. It is most certainly a decreasing oil pressure issue. Water is well within tolerance at manifold, head and antifreeze holding tank. Upon start, 40psi. Gradually drops below 15 psi over the course of 30 minutes. No oil filter on this engine and oil is NOT foamy on dipstick when run. The low oil cut off sending unit is working properly.

For an experiment, I tried straight 50 weight, thinking heavier viscosity would prevent the low oil pressure. It made no difference.

I would agree perhaps worn out bearings is the problem except for the fact that the disparity between high pressure and low pressure is 25psi?

I am hoping that the pressure relief valve/spring may be faulty? Or perhaps the oil pump?

Any additional thoughts?

Last year I had cranked the engine too long before it started and sucked fresh water into crankcase. I did clean that mess up and flushed new oil through several times back then. Perhaps some of the gummy residue put pressure releif out of commission? Never really ran genny last year after that.

I’m thinking of emptying crank case once again and flushing with diesel?
Restitution is offline   Reply With Quote
Old 02-11-2018, 10:59 PM   #11
Senior Member
 
Restitution's Avatar
 
City: Kalama, WA
Vessel Name: "Restitution"
Vessel Model: 38' Californian
Join Date: Mar 2012
Posts: 200
Engine is not burning oil and seems pretty tight. It does have 800 hours on it.
Restitution is offline   Reply With Quote
Old 02-12-2018, 07:18 AM   #12
Valued Technical Contributor
 
DavidM's Avatar
 
City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,009
If oil pressure is 40 psi at startup and drops to 15 psi after running 30 minutes and 50 weight oil doesn't make any difference and you are not using oil, that sounds like an oil pressure relief valve problem, not the oil pump, the bearings or anything else discussed.

Don't know if that engine even has an oil pressure relief valve or how to get to it, but that is where I would focus.

David
DavidM is offline   Reply With Quote
Old 02-12-2018, 11:34 AM   #13
Senior Member
 
Restitution's Avatar
 
City: Kalama, WA
Vessel Name: "Restitution"
Vessel Model: 38' Californian
Join Date: Mar 2012
Posts: 200
I am in agreement that the pressure relief valve is my next thing to check. Im wondering if perhaps the relief valve is 'clogged' from last years episode with sucking in water? Sure would save quite a bit of time and work to simply flush the crankcase with diesel. Either way, I am leaning toward the valve as the problem.
Restitution is offline   Reply With Quote
Old 02-12-2018, 11:59 AM   #14
Guru
 
timb's Avatar
 
City: Oriental N.C.
Vessel Name: true heading
Vessel Model: marine trader 38 dc
Join Date: Sep 2017
Posts: 565
let us know what you find I'm going to try to get mine out the bring it home this weekend . there is a access plate on the bottom you can pull the rod cap if it goes that far .
timb is offline   Reply With Quote
Old 02-21-2018, 06:30 PM   #15
Guru
 
timb's Avatar
 
City: Oriental N.C.
Vessel Name: true heading
Vessel Model: marine trader 38 dc
Join Date: Sep 2017
Posts: 565
Click image for larger version

Name:	IMG_20180221_182355256.jpg
Views:	136
Size:	66.9 KB
ID:	73181
timb is offline   Reply With Quote
Old 02-21-2018, 06:32 PM   #16
Guru
 
timb's Avatar
 
City: Oriental N.C.
Vessel Name: true heading
Vessel Model: marine trader 38 dc
Join Date: Sep 2017
Posts: 565
I got mine out do you have a parts source? I think it's where the oil smell was coming from.
timb is offline   Reply With Quote
Old 02-22-2018, 01:01 PM   #17
Senior Member
 
Restitution's Avatar
 
City: Kalama, WA
Vessel Name: "Restitution"
Vessel Model: 38' Californian
Join Date: Mar 2012
Posts: 200
Yep. I ended up putting the genny project on hold for several weeks due to busy schedule and weather. Will pick back up on it in three weeks and let you know what I come up with. I plan to run some diesel oil in the crankcase in lieu of oil for a very short period of time to wash out. Then refill with Delo400 14w40. If problem persists, I will take out some oil to the low line on the dipstick as too much oil may be causing foaming. One way or another, I'll chase the problem down. Good luck with yours!
Restitution is offline   Reply With Quote
Old 02-22-2018, 09:39 PM   #18
Guru
 
Xsbank's Avatar
 
City: Pender Harbour, BC
Vessel Name: Gwaii Haanas
Vessel Model: Custom Aluminum 52
Join Date: Sep 2013
Posts: 3,791
If you had water in the crankcase and then it sat the relief valve may be rusty. Try and take it out for a look.
__________________
Don't believe everything that you think.
Xsbank is offline   Reply With Quote
Old 02-23-2018, 01:52 AM   #19
Senior Member
 
Restitution's Avatar
 
City: Kalama, WA
Vessel Name: "Restitution"
Vessel Model: 38' Californian
Join Date: Mar 2012
Posts: 200
Exactly!!! I was thinking that diesel in the crankcase might unclog or free the relief valve up? Perhaps I should go directly to the source. Do you know where the relief valve is on the ferryman?
Restitution is offline   Reply With Quote
Old 06-28-2018, 11:04 PM   #20
Senior Member
 
Restitution's Avatar
 
City: Kalama, WA
Vessel Name: "Restitution"
Vessel Model: 38' Californian
Join Date: Mar 2012
Posts: 200
Does anyone know where the pressure relief valve is on these Ferrymans?
Restitution is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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


» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 07:17 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012