Changed the oil and lube on my 2001, 210 Signature, Bowrider. New boat to me, never had it in the water. Put muffs on and ran water to the outdrive. It doesn't appear to be taking the water and I have an alarm after about 15 seconds. Constant beep. My fuel gauge stays below empty, even though I put 10 gallons in. How many different things can cause this alarm? Way late to schedule service and I need to get it in the water. Help!!