making the nose sit lower??

Joined
Aug 5, 2007
Messages
21
We just got our family a cheap 12 foot tinny and 15Hp mariner motor and I'm wondering how to go about getting it to sit level in the water?

With just one person it sits really high in the front and Ive been told that it is possible to get the nose to sit lower, but Im not sure how to do this so Im looking for tips please.

Thanks in advance.
 

ziggy

Admiral
Joined
Jun 30, 2004
Messages
7,473
Re: making the nose sit lower??

not tryin to be funny, but ya got to much weight in the back i'd think. shift fuel tank to fwd would be one idea. a lighter engine would be another. keep the anchor in the ft. too. yer boats gonna be weight sensitive. adj. accordingly. if ya got the weight capacity to do it. put a rock up ft..........
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: making the nose sit lower??

move the tilt pin all the way in, as far as you can, this way the motor push the bow down, 15 on a 12 footer in alot. as much weight as you can put forward. i had a 14 footer w/ 15 hp. i had to put remote controls to the middle seat with stick steering inorder to fish alone.
 
Joined
Aug 5, 2007
Messages
21
Re: making the nose sit lower??

not tryin to be funny, but ya got to much weight in the back i'd think. shift fuel tank to fwd would be one idea. a lighter engine would be another. keep the anchor in the ft. too. yer boats gonna be weight sensitive. adj. accordingly. if ya got the weight capacity to do it. put a rock up ft..........

Will give the idea of "moving the fuel tank forward" a go, the anchor is only 4Kg sand anchor and sits in the front all the time, and if moving the tank (25 litre = approx 25Kg) forward doesnt work then I will consider some "ballast" for when i go out by myself

We really want to keep the 15Hp as it gets the tub onto the plane with 3 adults.



move the tilt pin all the way in, as far as you can, this way the motor push the bow down, 15 on a 12 footer in alot. as much weight as you can put forward. i had a 14 footer w/ 15 hp. i had to put remote controls to the middle seat with stick steering inorder to fish alone.

Is the tilt pin what makes the leg of the motor sit forward or backward? The remote control sounds good but mine doesnt have a middle seat, only has bench seats in the front and back.

My uncle has a 12 footer with a tiller controlled 25Hp on it that he uses to get his crab pots in and out, it is lethal when opperating it 1 up, but its really good with 2 people and 5 pots. Opperator control is the key I think. I would rather have a motor with more HP than not enough, It is easy enough to back the throttle off a little but very hard if you are fighting the tide to get home.

Thanks for the tips, will give everything a serious consideration.
 

freddyray21

Commander
Joined
Jun 10, 2006
Messages
2,460
Re: making the nose sit lower??

I had a similar set up years ago. When I was by myself when I got to the lake I would get some large rocks and put them in the front. When I left I would just put them back on the shore.
 

sankanother1

Petty Officer 2nd Class
Joined
Jul 26, 2007
Messages
129
Re: making the nose sit lower??

keep the beer on the bow of the boat..LOL, I don't think the bow sitting high is a problem.All boats do it. Some more than others.
 
Joined
Aug 5, 2007
Messages
21
Re: making the nose sit lower??

Ok, I seem to have found a great solution...... A mate told me yesterday, about a thing called a hydrofoil attachment which bolts onto the wing of the cavitation plate and it basically extends the cavitation plate to a much larger surface.

This is the LINK to the picture of the exact model which I today purchased for AU$55 and 2 pro fishermen that were in the store also highly recomended.

Mine is a Seamaster G2 hydrofoil, and as I wont be able to take the tub out again until next weekend, I will report back after then about the difference (if any) that it made.
 
Joined
Aug 5, 2007
Messages
21
Re: making the nose sit lower??

keep the beer on the bow of the boat..LOL, I don't think the bow sitting high is a problem.All boats do it. Some more than others.

I would but here in Australia we have "drink driving" laws for boats which are the same as the laws for the road.

In Australia (pretty well all states and territory's) you can be random breath tested by water police (or land police if they get you near the land LoL) and if you care found to be opperating over the legal limit's then the penaltys are severe.

If you are caught whilst actually consuming grog they can actually cancel your boat licence and boat rego.

Also A very close friend of mine was killed by his brother when we were 15 after they went fishing whilst drunk and at night, and my friend fell overboard, and when his bro turned around to get him and ran over him in the water which killed him before he could grab him out of the water.
 
Joined
Aug 5, 2007
Messages
21
Re: making the nose sit lower??

Ok, I fitted the "Seamaster G2 hydrofoil" that I mentioned in a post above.

What can I say?? Man these things are really awesome!!! They lifted the Aft and pushed the fore down nice into the water and made my tub sit totally level to the water.

Man it really made a difference to the speed as well, and we were pushing along quite nicely, unfortunately I didnt grab the GPS to take with us to get a speed, but I will do that in the next few days!

My opinion is that these hydrofoils are very well worth the money!

One down side: Since they add a much larger surface to the outboard, they also increase the sensitivity on the steering. We have a tiller steer, and it made it a little touchy at full throttle, not bad, but something to be aware of.

I found that I was running at under half throttle now with the foils attached, whereas before I needed to be over 1/2, and closer to 2/3 power!

What a difference that AU$60 made, and at least I dont need any rocks now! lol!!

Seriously though, thanks to all for the various suggestions etc.

Happy boating!
 

scrobo

Petty Officer 1st Class
Joined
Jul 5, 2007
Messages
277
Re: making the nose sit lower??

Did yo look into the Smart Tabs?
 

Cap'n Dave64

Recruit
Joined
Aug 31, 2007
Messages
3
Re: making the nose sit lower??

Already posted this on another thread:
I just put a stingray hydrofoil on my Starcraft 16ft Starfire with a 60hp 4stroke Yamaha. Here's what I think:

Pros: Gets on plane faster, holds plane at lower speed (15mph vs 12), much smoother ride thru chop, much less roll in turns, quieter (less wave slap), lower bow at any speed, less steering grab when hitting waves at an angle, less wake at transitional speeds

Cons: 0.5 - 1mph loss at WOT, one more thing to hit something with (not that that has happened)

Oh yeah that top speed loss? only applies to flat calm conditions. Otherwise faster with hydrofoil. It's like a brand new boat. It seems to me that people with light fairly fast boats like mine have had the best results, I'll gladly swap 33mph top end with 34mph top end for all the other things. BTW tested the boat on consecutive days in exact same conditions and boat loads (only diff was the foil) and was blown away.
 

moterboat

Petty Officer 1st Class
Joined
Aug 23, 2007
Messages
275
Re: making the nose sit lower??

I know where your at,been there done that,I has a 12 ft aluminum v bottom open boat and put a 35 hp evinrude on it,it would stand straight up taking off hard,w/one person.had to always take a friend w/ me to sit in the bow to keep er down.but if you add a console and steering wheel,it will weight down the front,but you will lose top end.
 
Joined
Aug 5, 2007
Messages
21
Re: making the nose sit lower??

Already posted this on another thread:
I just put a stingray hydrofoil on my Starcraft 16ft Starfire with a 60hp 4stroke Yamaha. Here's what I think:

Pros: Gets on plane faster, holds plane at lower speed (15mph vs 12), much smoother ride thru chop, much less roll in turns, quieter (less wave slap), lower bow at any speed, less steering grab when hitting waves at an angle, less wake at transitional speeds

Cons: 0.5 - 1mph loss at WOT, one more thing to hit something with (not that that has happened)

Oh yeah that top speed loss? only applies to flat calm conditions. Otherwise faster with hydrofoil. It's like a brand new boat. It seems to me that people with light fairly fast boats like mine have had the best results, I'll gladly swap 33mph top end with 34mph top end for all the other things. BTW tested the boat on consecutive days in exact same conditions and boat loads (only diff was the foil) and was blown away.

Quick question, how would you rate stability at speed?

We have found in the past weeks since installing our G2 hydrofoil, the steering is very touchy, especially at speed.

Eg: in our 11 footer with 15Hp Mariner/yamaha, hydrofoil's installed, Me (105Kg) sitting at the tiller, 80 Kg wife up front.
At about 3/4 throttle (28Kmh / 17Mph /15 Knots) I used only my arm and reached over for my handheld GPS which was about to roll off the seat, and surely my arm doesnt weigh THAT much, but the boat took a hard left and my wife was almost thrown out of the tub.

I was VERY disturbed, and she was too, which resulted in loads of yelling (arguing).

It was DEFINATELY NOT a control issue as the motor was still steering in the same position (straight) when I returned swiftly to the throttle.

Several tests after this event at half to 3/4 throttle have shown that even moving my head from one side to the other will steer the tub reasonably sharply.

We have now removed the hydrofoil's and are awaiting the distribution company's rep to visit to look at how I set the hydrofoil's up.

I went through the installation instructions with the manager of the store where I made my purchase, and he said that he cant see anything wrong with my installation, it is all perfectly as per the instructions and nobody (distributor and store) can explain why I would have this increase in the control's reaction's.


I did notice that it got to the plane super fast and holds plane at much lower speed, and was around 5Kmh FASTER at full throttle. Also like you said, it was noticably much smoother ride thru chop, but it seemed to INCREASE the inward roll in the turns, (Ie: left turn, left side DIPS toward the water), I also think that it was quieter and the bow was also sitting lower at all speeds, and there was definately alot less wake at all speeds.
 
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