Ok....here is the story. I have been trying to get the old girl above 4800. She is running great..no missin, jumps on plane, 37 on GPS.<br /><br />This weekend my friend brought his 17 ft with new 70hp Yammy, his boat is 100-150 lighter than mine. Both boats have the same size props 13 1/4 x 17. His is aluminum mine is SS. Both boats have same hull design. I had 500 lbs of people and a full 15 gal tank in mine he had 400 and 1/2 15 gal tank in his.<br /><br />Here is the thing: Running down the river @WOT was neck and neck, until I edged in front of him and he had my wake to deal with. HAHA. His RPMS were @ 5900 mine were @ 4800, or so the gauge said. There is no brandname on my gauge so I cant go to their website. On the back there is 4 settings: 2cyl, 3cyl, 4cyl and 6 pole...I have it set at 6 pole. Do I need a new tach for my 77 85hp Evvy? Thanks for any help!
