I need help Oil Pressure sender? - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems
 Not a Member? 


Like Tree1Likes
  • 1 Post By Classic30
Reply
 
LinkBack Thread Tools
  #1  
Old 10-30-2013
First String
 
Join Date: Jan 2009
Location: South carolina
Posts: 808
Thanks: 39
Thanked 7 Times in 7 Posts
Rep Power: 6
ltgoshen is on a distinguished road
I need help Oil Pressure sender?

I have a question about my newly installed 2GM20F.
I just installed this engine last month. It came with its own electrical panel and looms. It was a good running take out, from another sailboat
The Buzzer in the old engine I took out would sound the second I turned the key on. Once I pushed the start button and gained oil pressure the buzzer would turn off. The new engine does not do that? I am afraid to run the engine long as I may or may not have oil pressure. So here is the question. Is there a way to check the pressure switch with a meter? It screws into the block just under the oil filter base and has one wire connected to it. I know the buzzer is good. It will sound with the toggle switch on the interments panel.
So I need to know if there is a way to test the switch. And please explain step by step. I know nothing about electrical stuff. I am trying to learn and I am reading a lot of books and watching u-tube how to vid to try to get better at it.
Thanks for your help.
Capt. Curt
Reply With Quote Share with Facebook
  #2  
Old 10-30-2013
erps's Avatar
the pointy end is the bow
 
Join Date: Aug 2006
Location: La Conner, Washington
Posts: 6,154
Thanks: 2
Thanked 26 Times in 26 Posts
Rep Power: 10
erps will become famous soon enough erps will become famous soon enough
Re: I need help Oil Pressure sender?

The sender unit should have variable resistance to ground depending on the oil pressure. In the case of a buzzer, it should have low resistance when there is no/low oil pressure (which allows a path to ground, closed switch) and the sender should open the switch to ground when there is oil pressure. This is a generalization. Resistance is measured with an ohm meter. Put one lead of the ohm meter on the electric contact on the sender and the other lead on the engine block. The reading should be a closed switch, or very low ohms. Now have someone start the engine and see if the ohm reading goes higher. An alternative is to screw out the sender unit, put your finger over the hold and have someone start your engine momentarily and see if oil squirts out.

I don't understand the toggle switch test on the instrument panel. On my boat, when I turn the key to the run position, it energizes all the gauges and the low oil pressure buzzer sounds.
__________________
Ray
S.V. Nikko
1983 Fraser 41
La Conner, WA


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


Boating for over 25 years, some of them successfully.
Reply With Quote Share with Facebook
  #3  
Old 10-30-2013
rikhall's Avatar
old guy :)
 
Join Date: Feb 2008
Location: Fredericton, NB, Canada
Posts: 1,028
Thanks: 12
Thanked 13 Times in 11 Posts
Rep Power: 7
rikhall will become famous soon enough
Re: I need help Oil Pressure sender?

Curt

I am hoping it might be this simple, so please forgive me for asking.

Is the switch that "turns off" the alarms in the correct position?

(this is the on;u pic I have of the panel - sorry. It still had the plastic on it.)



Rik
__________________
Irwin Citation 34
Mystery
Reply With Quote Share with Facebook
  #4  
Old 10-30-2013
boz86's Avatar
Senior Member
 
Join Date: May 2012
Location: Maryland, US
Posts: 137
Thanks: 4
Thanked 2 Times in 2 Posts
Rep Power: 3
boz86 is on a distinguished road
Re: I need help Oil Pressure sender?

Just to be sure I understand, you're not getting the buzzer key on, engine off?

If so I had the same problem. The wire at the sender was corroded.

I would take a look there first, then at the back side of the panel. After that I'm thinking you have to do some continuity checking.
__________________
Sailing "Horizons," a Hunter 31, from the Middle Chesapeake around Solomons Island.
I can keep a secret, it's the people I tell who can't.
Reply With Quote Share with Facebook
  #5  
Old 10-30-2013
Senior Member
 
Join Date: Feb 2010
Posts: 174
Thanks: 1
Thanked 7 Times in 7 Posts
Rep Power: 5
redline is on a distinguished road
Re: I need help Oil Pressure sender?

Try connecting the sender wire to ground at the engine end - that should turn on the buzzer and warning light. If it does, the wiring is OK and it's probably the sender. If not, the problem is in the wiring.

Note that Yanmar engine harnesses can have several sets of connectors between the engine and the control panel (mine has 7 (yes, seven!) in all including an extension cable and three different plugs right at the panel). Find/check/clean each of them to be sure.
__________________
Norman
s/y "Redline"
1998 Jeanneau SO45.2
Reply With Quote Share with Facebook
The Following User Says Thank You to redline For This Useful Post:
ltgoshen (10-30-2013)
  #6  
Old 10-30-2013
First String
 
Join Date: Jan 2009
Location: South carolina
Posts: 808
Thanks: 39
Thanked 7 Times in 7 Posts
Rep Power: 6
ltgoshen is on a distinguished road
Re: I need help Oil Pressure sender?

Quote:
Originally Posted by erps View Post
I don't understand the toggle switch test on the instrument panel. On my boat, when I turn the key to the run position, it energizes all the gauges and the low oil pressure buzzer sounds.
On my Panel there is a toggle switch that if held in the up position will sound the budder and make the charge light Oil Pressure light come on? Both the old one and the newer one workid like this,
See in the photo just above the start button.
Reply With Quote Share with Facebook
  #7  
Old 10-30-2013
First String
 
Join Date: Jan 2009
Location: South carolina
Posts: 808
Thanks: 39
Thanked 7 Times in 7 Posts
Rep Power: 6
ltgoshen is on a distinguished road
Re: I need help Oil Pressure sender?

Quote:
Originally Posted by rikhall View Post
Is the switch that "turns off" the alarms in the correct position?

(this is the on;u pic I have of the panel - sorry. It still had the plastic on it.)


Please see my note to erps.
Yes its in the correct position thow its a earler style.
Rik
Reply With Quote Share with Facebook
  #8  
Old 10-30-2013
First String
 
Join Date: Jan 2009
Location: South carolina
Posts: 808
Thanks: 39
Thanked 7 Times in 7 Posts
Rep Power: 6
ltgoshen is on a distinguished road
Re: I need help Oil Pressure sender?

Thanks for all the help.
I will go after work and try no start/key on led to ground and see if it buzzes.
If not I will I will pull the sender out of the engine I just replaced and see if thet sender works. If not I will go to the back side of the switchand start there.


Thanks again.



Reply With Quote Share with Facebook
  #9  
Old 10-30-2013
Classic30's Avatar
Once known as Hartley18
 
Join Date: Aug 2007
Location: Melbourne, Australia
Posts: 4,526
Thanks: 28
Thanked 42 Times in 42 Posts
Rep Power: 9
Classic30 will become famous soon enough Classic30 will become famous soon enough
Re: I need help Oil Pressure sender?

Quote:
Originally Posted by ltgoshen View Post
Thanks for all the help.
I will go after work and try no start/key on led to ground and see if it buzzes.
If not I will I will pull the sender out of the engine I just replaced and see if thet sender works. If not I will go to the back side of the switchand start there.
You don't need to go to that trouble just yet..

Disconnect the wire off the back of the sender, clamp it to the engine chassis (ground) somewhere close by and turn the ignition on (don't start the engine!). The buzzer and "low oil" light should turn on. If they don't, the problem is not the sender, but somewhere in the wiring.
rikhall likes this.
__________________
-
"Honestly, I don't know why seamen persist in getting wrecked in some of the outlandish places they do, when they can do it in a nice place like Fiji." -- John Caldwell, "Desperate Voyage"
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sender units for Farymann RodH Diesel 4 06-23-2013 04:29 PM
oil pressure sender Yanmar 2GM boz86 Diesel 2 03-18-2013 02:34 PM
Oil pressure sender Hudsonian General Discussion (sailing related) 1 12-15-2010 01:11 PM
Add fuel sender Mystiko Diesel 2 12-06-2009 11:56 PM
mast head sender mike dryver Gear & Maintenance 0 05-14-2006 06:37 PM


All times are GMT -4. The time now is 11:02 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.