2004 F115 oil pressure warning

[finaticfishing]

In these disturbingly cold Florida winter mornings, @ 65 degrees, one of my motors gets an oil pressure alarm at first start up and running for a minute or so. If I let it run a few minutes, shut down and restart, the warning goes away. I never have this problem when it is over 75 degrees or so. Any ideas other than replacing the low oil pressure switch? Could it be something else. Motors have @ 600hrs on them and only one has the issue.

[99yam40]

IMO You really need to have the pressure and the pressure switch checked to see if the pressure is really low or the switch is a problem