My friend has a Mobius V-drive. Last night we put the battery in and cranked the motor for the first time this season in the garage (without water supply). The engine fired immediately and we ran it for about 5 seconds. The V-drive oil pressure light under the throttle control stayed on while the motor was running. This never stayed on last season. My friend found a loose wire at the V-drive pressure sensor and repaired it last week. This would explain why it was never on last season. Does the water intake need to be attached for the sensor to go off? The boat has very low hours. Could the pressure sensor be bad? I believe the boat is a 2005.