huntercj Posted September 12, 2016 Share Posted September 12, 2016 I have a 2003 Yamaha 75 four stroke tiller on a 17 foot starcraft stare fire. I have tried a few props and about the best I see for top speed is 30 to 31 on gps. Just seems slow to me or am I expecting too much from a 75? Quote Link to comment Share on other sites More sharing options...
delcecchi Posted September 13, 2016 Share Posted September 13, 2016 That is about it. You can look at the various tests of similar rigs on places like boattest.com, as well as the manufacturers sites. Remember a 75 hp motor is pretty much the same top speed wise no matterwhat brand. Quote Link to comment Share on other sites More sharing options...
huntercj Posted September 13, 2016 Author Share Posted September 13, 2016 Thanks , that's what I thought. I should just up grade to a 90 I see there the same weight. Quote Link to comment Share on other sites More sharing options...
delcecchi Posted September 13, 2016 Share Posted September 13, 2016 The 90 should get you maybe another 3mph That's about what I got going from 115 Merc to a 140 Suzuki Quote Link to comment Share on other sites More sharing options...
vtx1029 Posted September 13, 2016 Share Posted September 13, 2016 Yep that's about what I see with my 17' alumacraft and a 75hp merc 2 smoker Quote Link to comment Share on other sites More sharing options...
delcecchi Posted September 13, 2016 Share Posted September 13, 2016 One other thing that is in favor of the 90 is that it will be better with a heavy load. With my boat and the 115 (it was rated for 150) if I had a bunch of people in it, like 4 or 5 adults, it struggled some. Now that is much better. Quote Link to comment Share on other sites More sharing options...
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