old Monark not planing right??

[mtduckhunter]

i have an old 15 ft monark with a 70 hp johnson on it. it doesnt plane very well. the front of the boat seems to be riding in the water at full throttle( i think there is a name for this but i dont know it ).

does anyone know what the problem is and how i can fix it? inexpensivly

 

[tashasdaddy]

Re: old Monark not planing right??

are you carrying extra water weight, wet foam. you can try moving your tilt pin out 1 hole at a time to bring the bow up. what you have is plowing.

 

[mtduckhunter]

Re: old Monark not planing right??

i dont know if it has foam under the floor or not? i hope not because i dont know how i would get it out!!

 

[JCF350]

Re: old Monark not planing right??

i have an old 15 ft monark with a 70 hp johnson on it. it doesnt plane very well. the front of the boat seems to be riding in the water at full throttle( i think there is a name for this but i dont know it ).

does anyone know what the problem is and how i can fix it? inexpensivly

What TD said plus your hull may have a hook in it. Does it drive the bow down more the faster you go?

 

[mtduckhunter]

Re: old Monark not planing right??

yea it seems worse at full throttle.

 

[QC]

Re: old Monark not planing right??

Does it have a hydrofoil on it?

 

[JCF350]

Re: old Monark not planing right??

yea it seems worse at full throttle.

If it has a hydrofoil on the motor remove it, any trim tabs? raise them up, and retry.

If not check the hull for hook (It will look concaved along the length of the keel). If it does you can do some glasswork and fill it in to bring it back straight. Then check your trailer, hooks are usually caused by improper setup of the rollers or bunks on the trailer and the hull eventually forms to the discrepancies.

 

[mtduckhunter]

Re: old Monark not planing right??

no it doesnt have a hydrofoil but i thought about trying one. do they work?

does anyone know if this boat has foam in the floor? its a
1972 monark delta II.

 

[QC]

Re: old Monark not planing right??

A hydrofoil is likely to make this condition dramatically worse and they are not popular here. Let's get her right to start with, and then work on any additons after that . . .

You should consider/adjust trim as td noted above as well as the hook discussions. Those are the first two places to look. The point being that they need to be tried and/or eliminated to help you with this issue.

 

[mtduckhunter]

Re: old Monark not planing right??

i tried all 5 trim settings and it seemed to be the same on all of them. except the top 2 which i could not even get it up on plane.

as far as the hook, i just went and looked at it and it dont look to have any.

 

[tashasdaddy]

Re: old Monark not planing right??

yes old monarks have foam. suggest taking a hole saw, in a drill cut a 2 inch hole in the deck, save the plug. twist a piece of pvc into the foam. then check the core. if dry use 3m5200 to put plug back in.

 

[mtduckhunter]

Re: old Monark not planing right??

thanks i will try that. how long does it take to get waterlogged?

 

[mtduckhunter]

Re: old Monark not planing right??

i did what you said and there wasnt any foam. there was nothing but soaking wet rotted plywood.

could this be adding weight??

 

[StuBone278]

Re: old Monark not planing right??

hah well I'd imagine water-logged, rotten plywood would weigh a ton! It would weigh the same as if the whole boat was full of water! Besides, I don't think you want rotten wood all in your boat, unless it's an environmental thing .

I know I used to have a wooden deck on my little 14ft. and when it rained (before I put some paint on it) it would get water-logged and I couldn't even get on a plane.

 

[mtduckhunter]

Re: old Monark not planing right??

its not even attached to the fiberglass floor anymore. its fallen off and onto the bottom. i will probably remove it and put in a new floor. i cut a 1 1/2 inch hole and i could see this nasty stuff! i am afraid of cutting the floor up and there not be alot in there.

 

[tashasdaddy]

Re: old Monark not planing right??

look at this. http://www.shareaproject.com/pages/projectTut,p,346,00.html

and this. http://70silverline.250free.com/Skankybeast.html

with the boat being a 1972, it may be best to replace the hull. from what you are describing, can get expensive, and will not add any value to the hull.

 

[mtduckhunter]

Re: old Monark not planing right??

i am going to remove the rotten wood. i know its adding alot of weight. i think its gotten so rotten its all went to the back of the boat.

 

[tashasdaddy]

Re: old Monark not planing right??

i think you are correct. it is now time to start a thread, in the restoration forum referencing a link to this thread, great help there. http://forums.iboats.com/forumdisplay.php?s=&daysprune=-1&f=22