17 foot express w/90

[lilfarms]

thanks. before I put the jack plate on it would do about the same speed. It should do better but didn't. i met a guy at a marina who had the exact set up as me and told me his boat would top out under 40 then put on a 6 inch jack plate and now would hit 50. I bought one and didnt get the top end speed but like the peace of mind of having the engine up so high because of the marsh im usually in. I'm going tomorrow hopefully and going to make about a 10 mile ride to my first spot so I wanted to make some adjustments. I almost always cruise at 4000 rpm and my speed fluctuates from 28 to 31. Should I be able to tell a difference if Im not maxed out or do I need to oped it up to see the top end difference. Thanks and I appreciate the response.

[bamacj]

I had a H-51 express with a 90 yam. No plate it would run 46 with 2. Your mota is too high. Do you have a water pressure guage?