I'm restoring a Hunter 23 (victim of Hurricaine Sandy) and need to repower. I have access to buying a Mercury 3.5 h.p. 2009, apparently good shape, little used, $500.00, and wondering if it is enough power. I think the price is ok. Sailing conditions are variable; South Jersey, mostly summer, and tidal changes are approximatly 4 feet. I am an experienced open ocean sailor on larger sailboats and have never needed a motor this small. Thanks for any input.