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Old 06-23-2010, 07:23 PM
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Join Date: Jun 2010
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Default 9.8 prop problem

I have Mercury 9.8 serial 9395101 for use on 13' 6" fishing boat. It came with 2-blade prop, 8 spline.Motor revs high & goes nowhere fast. Does it need perhaps a 3-blade , larger & with more pitch. If so where do I get one as they don't seem to be listed for 9.8. Please help.
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Old 06-24-2010, 05:42 PM
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Location: Lake Placid, Fl
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The prop hub may be slipping, scrib a line across hub of prop and prop washer under prop nut, take boat for a run and check to see if line is still aligned, if not prop is slipping and needs to be rehubbed.
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Old 08-01-2010, 07:33 PM
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Default 9.8 prop problem

Have fitted Blackmax 3 blade 8.5 x 8, much better. cost £40 new off ebay.
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