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    quick gas question???

    Alright, quick question, does the gas i use for my 175 hp 1985 mariner matter. Should i use unleaded reguler, or use premium gas?? If it does, would it have an effect on the boat performance? Any advice is much appreciated.
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    propeller hub question

    Alright quick question does all propeller have a rubber hub shock absorber?
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    Performance Vent System..????

    Performance Vent System can change about how many mph? is it just about 5-10 mph or is it about 30-40 mph? My motor is a 175 hp mariner and it's going about 10mph. Need help as much as possible. It use to go about 60+. Does all boat's propeller have a rubber hub or not? NEED HELP...
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    hub????? Questions

    how would you change a spun hub? What are the symptom of a spun hub? Does all propeller have the plastic shock absorber hub? my propeller is a quicksilver and a 175 hp motor. Please need advise and thanks in advance.
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    slow speed....HELP

    Hello, my 175 hp boat somehow can only go about 10-15 mph. it use to go about 50+. What would the problem be for my boat. Is it the wire or propeller or some other thing with my motor? When i give it full throttle it seems as though the motor isn't changing gear, the motor just work harder...
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