I have a 16 foot 2001 bayliner with a mercury 50 hp with oil injection ,I recently noticed some bluish oil driping from the motor housing when I tilted the motor up for trailering after boating.I cleaned out the houseing and ran the motor with the cover off but could not tell where it was comming from.It does not leak unless it is running.The motor runs fine,could it be something with the oil injection??????????