Engines should be cleaned of any drips or other runs. When an engine and engine room is not clean, chafe and/or leaks may not be identified early enough to prevent problems. I recommend running engines a minimum of 15-20 minutes a week, depending on type. Consult a qualified marine engine mechanic.  When the engine heats up inside and the outside is still cold, it will cause condensation.   Overtime this condensation will damage the engine.  When the engine is hot, I recommend using WD-40 type lubricant to spray components.  The metal absorbs the protective shield and when the engine cools down the pores are closed and the engine is protected better.  This I learned in the Navy and used it on 104G engines and other air planes. I suggest  re-applying areas that have additional corrosion until the dry rust spots absorb the oil.  Most people do not check their engine, generator oil or transmission levels.  I highly recommended doing this inspection before starting the systems.

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