I have an alpha one outdrive and it is taking in water from a small hole near the exhaust vent. It is a round hole about 1 inch in diameter. It has one on each side of the exhaust vent. I put my finger in the hole on the left side and I can feel some metal in there, on the other side though when i put my finger in it i feel nothing. I used a garden hose and forced water thru the hole and I can see water getting into the bilge area. Is this a big money fix or something i can do myself. Thank you