Grant actually owned one slave himself as well: Grant himself owned a slave named William Jones, acquired from his father-in-law. At a time when he could have desperately used the money from the sale of Jones, Grant signed a document that gave him his freedom. Grant freed this slave in 1859.
Volunteers dedicated more than 100 hours, on average, to sports and recreation (120 hours), religion (117 hours) and social services (116 hours). But they gave only about half as many hours to education and research associations (66 hours) and to health-related organizations (58 hours) (Chart 3).
Re: How many hours are too many? 25 to 50 hours per year is average useage in my area. 424 hours in 12 years seems fine. 1500 hours would mean rebuild time if the engine is well looked after. not exactly a rare boat with rare features, so if the price doesn't beat others with lower hours, move on.. there's no shortage of low hour boats. of course, not many 18 footers have hour meters.