I installed one in my boat (single 175 HP Johnson 2 stroke). I think it cost me about $350 at the time. It took me about 8 hours to install though it should have taken half that (live and learn). It has always worked good for me. I use it to show me the best consumption rate vs speed AND to count EXACTLY how much fuel I have in my tank. My gas gauge is only a rough estimate. It takes about 20 gallons just to come off full and when it shows half a tank it's well less than half. Every time I fill up I write down what the total is. It gives me piece of mind to know how many gallons are in my tank. Not that I push it, I just want to always be aware of fuel. If the weather kicks up it can be as important as oxygen. Remember 1/3 out, 1/3 back, 1/3 reserve.
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