Boat hooked

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Jan 19, 2015
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hello guys! i have a 14.5' jonsen V-to-flat bottom boat thats ive been working on as a project. most of my fishing time is done in the back water (florida flats) (im a hop skip and jump from daytona beach/new smyrna beach florida) the boat is a fiberglass hull, and has a 1980 evinrude 35 hp motor on it.
ive torn the rear seat out, and replaced it with a rear deck and added a center console to the boat, about 4-5 feet from the bow.

the boat runs great up to approx 20 mph (phones GPS, accurate with truck GPS) this is about half throttle. any more gas and the boat wants to push the bow down, throwing a big wake and shove to one side or another. after being stumped, replacing all the motor mounts on the engine (they were old and falling apart) i turned to the internet for guidance. after lots of reading here on Iboats and a few other websites i learned about boat hooking.
i have since pulled the boat out of the water, and checked it. it seems that the boat is in the shape of an upside down banana. its sat for many years before i got it with a motor on a unsupported trailer.

(i have two of these boats, one ive sank alot of money into (the one im talking about now) (its grey) and another one that does not have a title.(its green)

i took measurements and the green one does not seem to be hooked nearly as bad, but does have a slight hook to it near the end.

this makes me think the boat might have been made this way from the factory to assist in planing with a smaller motor.

and also have a bad hook from the time spent on the trailer.

has anybody had any experience with getting these out? ive had it support at the transom and the bow with about 500 lbs of blocks in the middle and watching it slowly sink. once it gets the bend out of it i plan to glass some more support into it. the boat has a single floor so it makes it easier to work with, unfortunately the supports gonna be in the way, but it is what it is.

if i need to cut the floor to get the factory hook out of the back of the boat (the last few feet closest to transom) i can do so, but would like a bit more info before jumping in it with a saw.

also looking at the option of the jet-jon conversions. from what i see most all the people ive seen have had a bit of success of putting jet ski motors in their small boats. my only concern is being in the flats, grass, rocks, dirt and mud. and how often it would plug up or potentially harm the drive/impeller.

If you look closely at the first pic, there is a string going from the bow to the transom showing a straight line.

any info and help is greatly appreciated. thanks in advance -joel
 

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sphelps

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A few things to check before you start tearing things apart .. Do you have the right shaft length motor for the transom .. The vent plate should be about even with the bottom of the hull . A little high or a little low is ok also .. Can you trim the motor up some . If it's angled in too much it will jump on plane fast but then it may push the bow down to far and get real funky on ya .. Just some thing to consider ...
Have you tried running it without the dol-phin ..
 
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I had to rebuild the transom when i got the boat, it was originally made for a short shaft, its now built for the 20" shaft thats on it. which the cavitation plate is level with the bottom of the boat. have tried to trim the motor up as well as down, seems like it doesnt really effect the bow diving much. although it is a little better with the motor up a notch, it still wants to make the bow dive. the dolphin doesnt effect it at all, on or off it does the same exact thing. =[
 

Woodonglass

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I heard of guy on the Fiberglassics forum with a similar problem that put a bunch of Bricks in his hull and then use a metal 55 gallon barrel, filled it with water, built a fire under it and then pumped the hot water into the boat and surprisingly it actually worked. Seems like he let it set for a week or so then pumped the water out pulled out the bricks and then reinstalled the stringers. He did this in the middle of the summer when it was already really hot.
 
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Im just curious if it was more so the weight of the water that did it, or if it was the heat. you wouldnt think the fiberglass would care much depending on how hot he actually got it, but i could be wrong. interesting none the less.
 
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The more i look at it, the more i notice that the hook in the back definitely looks designed into the hull. i cant get the boat over 20 mph on plane and it drafts alot of water, does anyone have any experience with removing these hooks (cutting and reglassing?)
 

sphelps

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How about some pics of the hook from different angles ..
 
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See if this makes it any easy, kind of hard to see, ill try to upload one marking it.
 

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Joined
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From this point back, seems easier to see in person.
 

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Teamster

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With a 25 horse I wouldn't expect much over 20 mph,..........
 
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Its a 35 hp with a 25 hp cover. model number is E35ECSM. runs about 20 mph with about 1/2 throttle, maybe a hair over. boats very light, no wood. other then the transom. the problem isnt top speed, the motor has plenty left. the problem is, i just cant get it there without it wanting to turn into a submarine and throw me out of the boat. lol.
 
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jbcurt00

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It was a tiller steer and you moved the helm to the front of the boat.....

I think weight distribution is a problem....
 
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What would make the difference between a bow rig and a tiller set up? if i get someone to sit in the back of the boat it doesnt change much. but if i start to move back there as well the bow comes out of the water a little, but not much. still throws wake pretty bad. up until about 20 mph it rides perfect. but the minute you give it any more gas itll start shovin the bow into the water.
 

jbcurt00

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I don't see anything that looks like a hooked hull in the pix, it does look like the center keel tapers up towards the stern and terminates flat at the transom. Perhaps the pix just don't show it very well.

Your 1st post says theres a string in the 1st pix you posted, I don't see a string:
fetch
 

Teamster

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A 35 horse of that vintage is probably closer to 25 horse by modern ratings,.....

It does sound like moving weight to the back of the boat should help,..

Does it have power trim and tilt???
 

Teamster

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Maybe try shimming the motor up another half inch and see if that helps??
 

sphelps

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Have you pulled a string to see how much of a hook it has . Or maybe a straight edge ...
Im kinda leaning toward jb's comment about the front helm weight . Or just a combo of both ..
 
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No, manual power trim and tilt. tried a few notches up and a few notches down. ill try to post better pictures when i can.
 

Teamster

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Power trim and tilt would help,.......

What pitch prop are you using??

And what rpm's are you getting with it??
 
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Props pretty worn out, so im sure the rpm would be a little higher then it should be. The prop is a 10x13. if you look at the pictures i posted, i know it looks like the keel terminates and tapers into nothing but this is not the case, it starts to taper to nothing at about 7 inches from the transom, and turns to nothing about 5 inches from the transom. so its not by any means a gradual taper. its actually the other way around, the floor is coming down making it look like the keel tapers to nothing.
 
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