I an helping a friend that aquired a Cat30 she is in very good shape, unfortunatly, nobody explained to him the rules of the raw water intake. Consequently he never closed it. After some time away from the boat the A4 has frozen and now needs to be taken out and overhauled or if we win the lottery repowered w/ a new Beta marine diesel. My question, has anybody had to take the engine out of the cabin. Any tips? can I use the boom to lift out the engine. Does anybody that has repowered, have any tips?