HAVE A 94 MODEL MERCURY 115 2STROKE OIL INJECTED. THINK WATER PUMP HAS WENT OUT CRANKED AT HOUSE HOOKED TO WATERHOSE. LET RUN 30 SECONDS OR SO AND NO WATER COMING OUT THE PEE HOLE. HOW LONG CAN I LET IT RUN TO SEE OR SHOULD IT START AS SOON AS BEING CRANKED? IF WATER PUMP IS OUT HOW MUCH MONET AM I LOOKING AT?