Help 2007 Yamaha 115 2 stroke Draining Cranking Battery

I took my boat into the shop to have the carburetor cleaned/rebuilt. Before I took it in, I had no issue with battery drain. A week after I got it back I took the boat to the lake and dead cranking battery. I went back home and the battery won't charge 100% so now I'm certain it's the battery, which is three years old and sits outside. Makes sense to me.

I buy a new battery with more CCA and RC, give it a full charge that evening, but by morning it's down to 50% charge. I check the positive from the motor and it's drawing over 250 MA just sitting there. Battery drains to 50% in about 5-6 hours. Anyone have any suggestions as to what could cause that many MA draw and what I need to look at? I'm not sure I what to take it back to the same shop as I found some odd things with my boat when they were done. I think they took it fishing.

Thanks for any help,
Bill<br /><br />
Modified by wkerber at 10:14 AM 1/17/2011

Modified by wkerber at 10:22 AM 1/17/2011