Yanmar Oil Pressure - SailNet Community
 
LinkBack Thread Tools
post #1 of 6 Old 07-28-2009 Thread Starter
Doug K
 
Join Date: Jul 2009
Location: Va Beach
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Yanmar Oil Pressure

I have a 3gm 22 hp w/ 4500 hrs on her. The oil pressure gauge normally sits at 40. At 2200 rpm's the gauge is dropping to about 25-30. Anyone know what's the normal pressure range?
Searunner37 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 6 Old 07-28-2009
Senior Member
 
timebandit's Avatar
 
Join Date: Sep 2002
Posts: 928
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
 
For your engine--40

You might want to check for fuel in the oil that might thin the oil and reduce the oil pressure.

Rick
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Mac 25
Copernicus
Southern California
I am not a prejudice racist sexist bigot. I just hate stupid people.
timebandit is offline  
Quote Quick Reply Share with Facebook
post #3 of 6 Old 07-28-2009 Thread Starter
Doug K
 
Join Date: Jul 2009
Location: Va Beach
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Yanmar Oil Pressure

Thanks for that advice on fuel in the oil. We just ran the engine pretty hard on a ten day cruise around the Delmarva Peninsula with out much wind. I am about to change out the oil with Rotella 15w-40w. We had been using Castrol 15w-40w. The engine is starting to get into the 190 degree range when I run the rpm's above 2200 leading me to think heat exchanger needs to be serviced. I'll change out the impeller as well. I was thinking the high temps may have something to do with a drop in oil pressure.
Searunner37 is offline  
Quote Quick Reply Share with Facebook
post #4 of 6 Old 07-28-2009
Senior Member
 
Join Date: May 2006
Posts: 201
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
If you do have diesel thinning the oil the diaphragm of the fuel pump is probably ruptured, if this is so you should see a rise in the oil level as well.

On the rise in temperature, if you have a heat exchanger on a 22HP 3GM you have a 3GMF. I found I had the same problem with my 3GMF and it turned out to be the small elbow on the water injection into the exhaust elbow. These engines also suffer from the exhaust elbow itself becoming blocked with carbon and corrosion. The heat exchanger is of course another point to check as you already noted.
r.furborough is offline  
Quote Quick Reply Share with Facebook
post #5 of 6 Old 07-29-2009 Thread Starter
Doug K
 
Join Date: Jul 2009
Location: Va Beach
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
I think you may have nailed it. I do have a 3GMF. The last time I looked over the heat exchanger I ran some welding rods thru it. It looked pretty clean. That was about 175 hours back. I'll check out that exhaust elbow. I may have overfilled the oil level bit when I was topping up after 26 hours of motoring. Do you think this could have affected the fuel pump diaphragm? I found it curious that when I went to top up after another 10 hours engine time that the oil level was just above full.
Searunner37 is offline  
Quote Quick Reply Share with Facebook
post #6 of 6 Old 07-29-2009
Senior Member
 
Join Date: May 2006
Posts: 201
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
Sent you a PM....
r.furborough is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Yanmar Oil Pressure Light/Alarm Out? Please help! gwp Gear & Maintenance 1 05-19-2008 11:32 PM
Yanmar oil pressure brak Gear & Maintenance 4 05-04-2008 09:40 PM
Oil Pressure Mystery Solved bsfree Gear & Maintenance 5 12-21-2007 07:23 PM
W60 - No oil pressure after oil change??? pma_foyl Gear & Maintenance 9 12-01-2004 09:45 AM
Oil Pressure Problems Tom Wood Gear and Maintenance Articles 0 05-16-2002 08:00 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome