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Did you mean oil level is good or you verified the level sensor is working? Drive oil level can be good & level sensor can be broken setting off alarm.Drive oil level is good.
Well with the engine running and alarm constant on, I unhooked the oil pressure alarm switch and the alarm stopped. The drive lube reservoir level is good so I’m assuming the level sensor is working fine, nothing was moved or unhooked from that during the engine swap. I am 99% certain I just need to move the oil alarm switch to an oil passage, and that it’s currently in a water jacket drain port.
Long story, but I had to add in a oil pressure safety shutoff switch for my new electric fuel pump, so I moved the original oil pressure alarm switch, and T’d the new oil pressure safety shutoff switch where the alarm switch was at (right next to the oil filter block mount) along-side the oil pressure gauge sender.
When I did all this, I thought/was told, that switch was a knock sensor, not realizing it was a low oil pressure alarm switch. So I thought it could be mounted anywhere on the block, so I bought some brass fittings and T’d that into a water jacket drain on the port side middle of the block.
I didn’t have any time to monkey with it yesterday but will tonight.
Long story, but I had to add in a oil pressure safety shutoff switch for my new electric fuel pump,
Well with the engine running and alarm constant on, I unhooked the oil pressure alarm switch and the alarm stopped. The drive lube reservoir level is good so I’m assuming the level sensor is working fine, nothing was moved or unhooked from that during the engine swap. I am 99% certain I just need to move the oil alarm switch to an oil passage, and that it’s currently in a water jacket drain port.
Long story, but I had to add in a oil pressure safety shutoff switch for my new electric fuel pump, so I moved the original oil pressure alarm switch, and T’d the new oil pressure safety shutoff switch where the alarm switch was at (right next to the oil filter block mount) along-side the oil pressure gauge sender.
When I did all this, I thought/was told, that switch was a knock sensor, not realizing it was a low oil pressure alarm switch. So I thought it could be mounted anywhere on the block, so I bought some brass fittings and T’d that into a water jacket drain on the port side middle of the block.
I didn’t have any time to monkey with it yesterday but will tonight.
Lucas, as you may know, the electric fuel pump's relay will be triggered by a N/O (normally open) style low oil pressure switch, and not by a N/C style, as per what may be used for a low oil pressure alarm system.
In other words, the N/O style will close during engine oil pressure, and will open in the absence of engine oil pressure.
Whereas the alarm switch will be open during engine oil pressure, and will close in the absence of engine oil pressure.
the oil pressure switch is a two terminal- two wire connection (therefor it can only be used one way) So what type NO or NC does not matter.
The oil pressure alarm switch is a one wire connection (therefor it can only be used one way) So what type NO or NC does not matter.
There are many different types of oil pressure switches out there. If the OP was to use the wrong one, his system will not work as intended.
View attachment 21986
Why not show a pic of the required switch, a link from our host's catalog page or something equally useful.
http://www.marineengine.com/newparts/part_details.php?pnum=MER87-805605A+1