8.1 oil pressure

[Michael340]

Hi everyone!
First time Sea Ray owner. I bought a 2003 340 with 8.1s motors. Question is, the port motor oil pressure gauges jumps to 100psi when I turn on the ignition also when running. I’m assuming it’s a faulty oil sender since it’s pegs out with just the ignition on. What do you guys think?

 

[CaptRonn]

Swap gauges and see if it still shows the same thing. If it does, it’s the sender, if not, it’s the gauge.

 

[Michael340]

Good idea!

 

[Michael340]

Swap gauges and see if it still shows the same thing. If it does, it’s the sender, if not, it’s the gauge.

I swapped the gauge and same thing. Ignition on, tach jumps to 100.

 

[CaptRonn]

I swapped the gauge and same thing. Ignition on, tach jumps to 100.

Sounds like a bad sender.