I'm not going to argue with you,4 gps devices can't be wrong. I got 33-34mph with a 14 pitch prop with just me in the boat. It is 100% possible because it happened just like I hit 28.2 mph with my 20hp suzuki. Sometimes things are unexplainable and I had a Witness with me,my buddy. I guess he must of fixed the gps to show a higher speed than I was going,come on,what do I gain from lying,nothing. It is what it is,if you don't believe it than that is your opinion but numbers and I don't lie. My 2 cylinder merc smoked any 2 cylinder on the water,a 3 cylinder is a different animal and I never mentioned 3 cylinder engines. I said mercs and yamaha,common sense would tell you I was talking about the 2 cylinder engine,not 3. All I do is buy and sell any and every brand of engine up to 25hp and I test all of them and the average speed for 25hp 2 stroke mercs in the 2 cylinder form on an aluminum boat is usually upper,upper 20s to the low and mid 30s. Tons of aluminum boats on YouTube doing well over 30mph with a 25hp 2 cylinder engine. Again I was pushing a 14 pitch prop not a small 11 pitch prop so it was a huge difference in pitch. With a full load ,a hair over 1000 lbs of toal weight in the boat we(2 of us)did near 32mph. Don't you think these numbers suprised me as well,that is why I verified with 3 other gps devices. The chances of 4 gps devices being wrong is around 0%. When I go out this week coming I will try to video my gps if I can while driving the boat . Like I said the 28.2mph was only for a minute or so,my average speed was 26-27mph with me and 100lbs in the front for porpoising purposes.tomme boy wrote:Not a 3cyl 25 Yamaha, Suzuki, or Tohatsu. Those Merc are good motors but not that good. That motor would have had to be putting out over 35hp to reach that speed. It is just not going to happen. Unless you had it on a 14' boat that was made out of 0.072" or lighter alum and you weighed less than 100lbs.
I have run jon boats my whole life so far,say 30 yrs or so and the wider the boat usually planes much easier and can get amazing speeds. The boat is only 310lbs. I know what all 4 gps devices said and it's accurate whether anyone believes it or not is irrelevant to me and I can care less. Numbers don't lie,plain and simple.