The 50-h.p. Force outboard is an alternate-firing twin, having the same equipment except for an alternator rated at 5 amps. ... 20, 25, 150 and 175 h.p. The all-new, V-6 175-h.p. Mariner fills the need of offshore boat owners who want more than 150 h.p. but feel ... AQUAMET 17 -Delivers high strength, outstanding toughness, and excellent corrosion resistance for the really rugged service requirements.