I'm needing some input here to help me make a decision. My 22 is powered by a Johnson 70, 4 stroke. For a kicker, I'm thinking of putting on a Nissan (or similar) 4/5/6 HP 4 stroke. Will the 4 or 5 HP push my 22 home in case I need it? Considering I might have to run uphill against a 3 knot...