My oil pressure gauge isn't working so I'm going to replace the gauge and the sender. The boat currently has a gaffrig 2-1/16" 0-80 PSI gauge. I'm replacing it with a autometer platinum, but I only see a 0-100PSI. If I put a 0-100PSI gauge, do I need to put a 0-100PSI sender on it? Thanks

Yes, you do need a 100psi sender, to match the 100psi gauge.

Thank you Mild Thunder!

Would a 98 Tantrum with stock efi502 be an electric gauge?

yes. Autometer makes the correct sender for that gauge. I believe oil psi is the blue wire in the harness.

I'm ordering from CP Performance and looks like there is only one 0-100PSI sender