Analog Gauge Low Oil Pressure Reading @ high RPMs

Jambrin

Member
Oct 25, 2013
36
Kentucky
Boat Info
2002 340 Sundancer
Engines
MX 6.2 MPI Hurth 630 V-drive
Looking for advice on what to check / change. My starboard engine analog oil pressure gauge is reading low at high engine RPM. It reads correctly at idle, but once engine speed increases above 1500 or so the oil pressure gauge needle drops closer to 0 instead of increasing closer to 50+.
I know the oil pressure is OK because I have vessel view mobile connected and the oil pressure at high RPMs is around 50, and also the systems monitor does not alarm.
Is there a separate sender for the alarm & vessel view vs the analog gauge? If so, can anyone point me to location on the engine of the analog sender that I can replace?
P.S. - I initially assumed the analog oil pressure gauge was faulty so I ordered a new one and replaced it, but the problem persists.
 
Probably the sender, #17 in the diagram, PN 815425T, that needs replaced? Probably the vessel view and systems monitor run off the sensor #16?
 

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