I have 871 Detroit in my 45 commander the oil pressure alarm went off the other day so I replaced the oil pressure sending unit the alarm Is now silenced but my pressure gauge reads over 100 psi at idle then it goes back down to 45 pounds roughly when I’m cruising speed do you think maybe I picked up a bad sensor
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You need to make sure the psi on the new sensor is the same as the old sensor. Wrong psi will cause gauge to be inaccurate.
Thanks Joe the new sensor is stamped 100 psi I’m gonna go back to the parts department see what I can do