Recent content by twillyse6

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    1998 Glastron

    I have a 1998 Glastron 175sx with a Volvo Penta engine. It is rated to go 41 mph @4600 rpm. Best I can get is 34 mph @ 3950 rpm at 4400 ft elevation with a 3 blade 14.5x19 prop. Is there anything I can do to improve speed and power?
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