Where is Oil Pressure Sender on Mercruiser 5.7L?

[tmh]

I have a 5.7L Mercruiser from early 90's. I am not getting a reading on my oil pressure sensor and I never have since buying the boat a few years ago. I have searched and read some threads here on troubleshooting and I get it, but I can't find the sender on the engine. Can anyone explain to me where to look for the oil pressure sender?

Thx.

 

[Lyle29464]

Re: Where is Oil Pressure Sender on Mercruiser 5.7L?

should be just under your exhaust manifold. It goes in the oil galley. looks like the temp sender

 

[Bt Doctur]

Re: Where is Oil Pressure Sender on Mercruiser 5.7L?

There or directly behind and to the right of the dist.

 

[tmh]

Re: Where is Oil Pressure Sender on Mercruiser 5.7L?

Thx. I'll check it out.

Can I test the gauge response like I did the temp gauge... by grounding the lead and seeing if the gauge pegs? I don't want to replace things willy-nilly unless I have reason to believe they are not working.

I did just order a temp sender as I was able to ground and peg the gauge AND the sender, when removed, looked beat. I hope that solves it. I guess I could have run the ohm meter on the sender but I really don't know how to do that or what to expect if "good" or "bad". $21 is a reasonable price for one I know is working anyhow.

 

[Lyle29464]

Re: Where is Oil Pressure Sender on Mercruiser 5.7L?

The sender works the same as the temp sending unit.