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What size gas tank?
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<blockquote data-quote="airshot" data-source="post: 298338" data-attributes="member: 1183"><p>The old rule of thumb for outboard motors was one gallon of gas per hour running time for every ten hp. So your 9.9 will have three hours run time with a 3 gal tank. That formule is for wide open throttle, if just putting around you can double that time frame. However there are many factors that increase fuel usage such as heading into a strong wind, choppy water, heavy load in the boat. I always figured a third to get out and a third to get in and a third for safety when I calculate how much fuel I will need. Hope this helps.</p><p></p><p>Airshot</p></blockquote><p></p>
[QUOTE="airshot, post: 298338, member: 1183"] The old rule of thumb for outboard motors was one gallon of gas per hour running time for every ten hp. So your 9.9 will have three hours run time with a 3 gal tank. That formule is for wide open throttle, if just putting around you can double that time frame. However there are many factors that increase fuel usage such as heading into a strong wind, choppy water, heavy load in the boat. I always figured a third to get out and a third to get in and a third for safety when I calculate how much fuel I will need. Hope this helps. Airshot [/QUOTE]
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What size gas tank?
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