2001 350 mag mpi audio oil sensor part number

[Dark Horse]

Hello all,
I have a 2001 350 Mag Mpi that has a bad oil pressure sensor switch. This is the switch that causes the audio alarm. Oil pressure is just fine.
I have looked everywhere and cant find a part number for it. There are like a thousand items that come up in a search even under the mercruiser name.
Any one have a part number or suggestion for the replacement?

[Viper]

Post your engine serial number and I'll look it up

[Dark Horse]

Serial number is OL672493
Thanks

[bud37]

Here is a link to the Mercury parts catalogue for future use......

https://www.mercurymarine.com/en/ca/par ... ts-catalog

[Viper]

I come up with part # 87-805605A1

[Dark Horse]

Thank you both for that info..
Helps me so much.

[Dark Horse]

One last question- any idea where I would find this on the engine? I've looked at the entire engine and I must be missing it.

[Viper]

Some are on the side of the block toward the back but most are at the back of the block behind the intake manifold. It'll probably be next to the oil sender for the gauge which is a small cylindrical canister. I believe in your case, both units will have one wire each.

[Viper]

Your switch is likely on the back but if you see something on the side of the block, don't mistaken the knock sensor for an oil pressure switch.

[bud37]

The fitting the knock sensor screws into may have a blue drain plug in it.......try not to disturb this assembly.