oil pressure sending unit problem

[atomb]

Hey guys i got a new oil pressure sender unit and went to install today.
I got the quicksilver one that I believe is the correct one ill have to check again but im fairly sure its correct.
heres the problem: when i go to thread the new one into the block it is to close to thread into the block -do they make an extensionor adapter coupler or something i really - I dont have an alarm oil sensor. whats the story on this, anyone have any ideas?

 

[Rocky_Road]

Re: oil pressure sending unit problem

Hey guys i got a new oil pressure sender unit and went to install today.
I got the quicksilver one that I believe is the correct one ill have to check again but im fairly sure its correct.
heres the problem: when i go to thread the new one into the block it is to close to thread into the block -do they make an extensionor adapter coupler or something i really - I dont have an alarm oil sensor. whats the story on this, anyone have any ideas?

My 3.0L (2005) has a fitting that goes into the block, and the sender unit then screws into the fitting. The reason that I know this is when I added the plumbing for the additional oil pressure switch, and I removed my sender unit, the fitting came out with it. The pipe thread on my sender is the same as on the fitting, so I could probably screw the sender straight into the block...but I would have the clearance problem that you seem to be describing.

I will see if I can find a parts diagram that shows this fitting....

Happy boating!

 

[atomb]

Re: oil pressure sending unit problem

Thanks rocky road im going to keep searchin. I just found your thread when you were doing your oil alarm. Ok I have some questions for you. Did you go with the original alarm you photod in the thread or did you buy the one don s suggested?
How is your setup working by the way? cant find the tee part number or that diagram anywhere.

 

[Rocky_Road]

Re: oil pressure sending unit problem

Thanks rocky road im going to keep searchin for what your talking about.pointing me in the right direction Rocky.

Go here...it is item #8 (part #22-32974):

http://www.perfprotech.com/store/assembly/Wiring-Harness-and-Electrical-Components,2330-40.aspx

I am sure that this can be had from NAPA.

Happy boating!

 

[Rocky_Road]

Re: oil pressure sending unit problem

Thanks rocky road im going to keep searchin. I just found your thread when you were doing your oil alarm. Ok I have some questions for you. Did you go with the original alarm you photod in the thread or did you buy the one don s suggested?
How is your setup working by the way? cant find the tee part number or that diagram anywhere.

I don't remember what DonS suggested, but I used the OEM Mercruiser oil pressure switch to keep things as original as I could. The buzzer, and the wiring, were already in my wire bundle.

The tee was easy to get at NAPA, and I used one of NAPA's brass nipples to move the tee away from the block. THAT WAS A MAJOR MISTAKE...since the brass nipple cracked within 3 hours of run time, and I didn't find this out until I was flushing out the motor. I had lost over 3 quarts of oil into the bilge, but never lost any real oil pressure nor hurt the engine. I immediately replace the stand-off nipple with a stainless steel one. My guess as to why the brass one failed is either I overtightened it, or the weight of both sending units caused it to flex and fatigue crack....

The alarm system now covers all three areas: oil pressure, water temp, and drive lube. It is working great, and I welcome the buzzer telling me all is well before the engine builds up oil pressure. I occassionally test the system by using the kill lanyard to stop the engine (this leaves the key in the "RUN" position), and I always get the alarm within several seconds of the engine stopping.

Here is my current oil unit(s) setup...!

 

[atomb]

Re: oil pressure sending unit problem

Thanks Rocky Road

 

[Rocky_Road]

Re: oil pressure sending unit problem

Glad to be of any help!

Point me to the alarm thread you saw, and I will look at it and PM you about anything that I did differently. I am a firm believer in having the alarm working as advertised, and can probably help you get yours figured out.

Happy boating!

 

[atomb]

Re: oil pressure sending unit problem

dont worry about it Im ok, i think, right now. sending unit is taking a back seat to getting the entire engine bolted together - I got a lot of little things to do and a few big ones.