Bow too far in the water

I have a 1994 70hp evinrude on a 16' sea nymph, after planing out and trim set like it should be if I give it more throttle it pushes the bow in the water to the point water starts coming over. If you trim it up nothing changes. Help please.,

What prop are you running? Sounds like it's just not doing it's job.

I will have to check in a little bit

I can't find any numbers on the prop.

probably have to take the prop off and get numbers off of the back of it....

I see 13 v or x 19 and then I see 38 4142

I just looked in the owners manual and it says run a 13 1/4 x17

that set up should be running a 15p at least and most likely will push a 17p but it does not sound like a prop issue to me. at speed, trimming all the way up can you blow the prop out of the water? kinda sounds like a tilt/trim issue

I would try and find a 17p to try, that 19p is too much prop...

check you transom too

Ok, let's reel this in a bit....
Better the details, the better the answers.
1. do you have power trim on that motor? Not clear from your description
2. Do you have a tach? If so, what's it reading at full throttle/trim? THAT is the number that will tell all.
3. The prop you have now, stainless or aluminum?
4. Are you throwing a big roostertail off the motor? Is the steering really tight at full throttle or is it a little loose?
5. How long does your holeshot take? Seconds from dead stop to on plane.

Without that information any advice is just a guess.

My check for a water logged hull.

Thanks for the replies guys. Yes I can blow the prop all the way out of the water. And the trim works. It is power tilt/ trim by the way. The transom has been reinforced with 1/2" thick plates of aluminum and is extremely stout. I don't have a tach so I can't see what I'm running. The prop that I was running was a stainless prop. Not throwing a big rooster tail. The steering is pretty tight not real loose but not so tight I have to man handle it. My hole shot is probably around 5-7 seconds. Never timed it but doesn't take a long time. Now it takes longer with 3 or more people.

I found an aluminum prop that is the size that the manual calls for. Gonna try it tomorrow and see what happens. It is a 13 1/4x17.

prop pitch isn't gonna push the nose down on that rig, angle of thrust is the only thing that will, sure, the 19p he has is too much prop but should only effect rpm's and speed, the way i read his post leads me to believe he does have tilt/trim

Curious to see how the 17p runs, holeshot should be better for sure. I don't think the 19p can hold the bow up, we will know more soon! Should get a rooster tail about as high as the top of the motor at WOT trimmed out.....if the bow will stay up. The aluminum 17p will flex more than a SS but it should help point in the right direction.....

On THAT boat with that motor, you really aren't looking for any roostertail at all. Not being mean, but slim chance that aluminum prop is going to do much, you want a prop that is going to hold the water and give you some lift. I really like a four blade stainless on tin boats, they handle better, and run better with a load.

I ran it with the aluminum prop, and the hole shot is was better. About 3-4 seconds. I still have the problem but I still have the problem with the lifting of the nose. The rooster tail didn't really change. And it's not as high as the motor it's pretty small actually. But the handling changed for the better also

now i'm confused, , first you say the bow was pushing down, now it's pushing up???

Sorry I mis typed that. The bow still wants to go too far in the water.

I'm stumped, the 17p seems to be about right and a SS will be better but can't figure out the bow down problem. Is the trim wired backwards? Is the motor still lifting when you are trimming up?

i still think you need to check the tilt/trim and the transom at the lower engine mount area, i would also check for a big concave dent on the bottom of the hull from the middle back to the transom, heck, it could just be low on hydraulic fluid, not letting it tilt up like it should

No sir the trim isn't wired backwards. I can be running wot (well what the boat will let me) and trim up and the motor will trim up all the way to the point it isn't in the water anymore. And it will go all the way down to the stops. The only thing I can think of is maybe a jackplate to raise the motor up on the transom. Or maybe the motor is mounted wrong on the transom. Just not sure how to tell that.

sorry, just went back thru the tread and saw you did check that tilt/trim, reinforced transom and so on, on that reinforced transom, why did it need to be reinforced? is the bottom of the hull straight? other than that, i got nothing unless the bow is weighted down

The boat came with a 60hp motor and my grandfather was having problems so he went and bought a brand new 70hp for it. Since it was a bigger motor even though they weighed the same he reinforced it. I tried uploading pics but it won't let me from my phone. I can't figure it out. He said it has always done it. I guess I will just have to live with it

Like recommended above, check the bottom of the hull for oil-canning at the stern.

Thanks for the help guys