New info for prop question

[quackaddict1]

Hey guys, I got my tiny tach in so I went to the lake today to see what the motor was spinning. My rig is a 1995 28hp Johnson on a 16 foot crestliner aluminum fishing boat. At full throttle with myself the dog and a fishing pole the motor maxed out between 5260 and 5350. This RPM reading was after I lifted the motor up 1 inch on the transom and messed with the trim of the motor. The middle pin seemed to give the best speed, but I don't really care about speed, im only concerned about longevity of the motor. I would imagine that since this was a very light load and it is on the bottom of the RPM specs, I should drop a pitch?

 

[steelespike]

Re: New info for prop question

Yes it would seem you could drop about 2" in pitch that should put you at about 5,700 rpm.Someone may be along with more specific suggestions.
A GPS speed would be interesting.

 

[quackaddict1]

Re: New info for prop question

I have a friend that has a GPS, I will have him bring it with sometime, but that will have to wait as he is in CA fighting fires right now. There was a noticeable pick up in speed today from past trips, but that could have been because I dropped 150lbs in weight. I will get more data and let you guys in on it.