14 ft fiberglass boat, will it hold a 75hp V4 evinrude

[1506cmo18]

I broke my motor which is a 40hp evinrude 1973, and found a great deal on a 75hp. I'm wondering if my boat will hold a 75hp v4 and be able to plane nicely?

My boat is heavy for a 14ft boat, it held the 40hp excellent. Picture of my boat


What do you guys think?

 

[ajgraz]

Re: 14 ft fiberglass boat, will it hold a 75hp V4 evinrude

75hp sounds a bit much to me for that boat. Does the boat have a capacity placard?

 

[Chris1956]

Re: 14 ft fiberglass boat, will it hold a 75hp V4 evinrude

Is your boat the one in the picture? If so, that V4 will be too heavy and powerful for it. A 50HP two cylinder would be the max, I would think, in terms of power and weight.

 

[BuzzStPoint]

Re: 14 ft fiberglass boat, will it hold a 75hp V4 evinrude

I have a 14ft SkiFlite glass boat.
I put a 55hp on it. It sits a little low..

I would thing a 75 HP would be way too much.

 

[1506cmo18]

Re: 14 ft fiberglass boat, will it hold a 75hp V4 evinrude

75hp sounds a bit much to me for that boat. Does the boat have a capacity placard?

No it doesnt have a capacity.


75HP is a a lot but ive seen some run them on 15 and 16ft boats...Mine is closer to a 15 ft boat but ive never measured.

My 73' motor is very heavy, so I was hoping a newer one would be lighter

 

[shrew]

Re: 14 ft fiberglass boat, will it hold a 75hp V4 evinrude

Information from the capacity plate would be helpful. As would a Make, Model and Year of boat. The rough rule of thumb for calculating capacity is:

(Length (ft) x Width (ft.) \ 15) X 150 = Total Capacity

Total Capacity: Weight of Motor, Gear, fuel and Occupants.


So, if you have a boat that is 14ft long and say 5 ft. wide, then the total approximate capacity would be (14 x 5 \ 15) x 150 = 700lbs.

This is an approximation, and I dont' really know the width of the boat. I would say with 2 200lb men (400lbs) this only leaves you 300Lbs for gear, fuel and motor. Gas is 6.6lbs per gallon. I think you're setting yourself up for a tragic cautionary tale.

 

[Thad]

Re: 14 ft fiberglass boat, will it hold a 75hp V4 evinrude

I'm wondering if my boat will hold a 75hp v4 and be able to plane nicely?

My boat is heavy for a 14ft boat, it held the 40hp excellent. Picture of my boat


What do you guys think?

Oh, that boat will plane out...right up to the point you want to come off of plane and swamp it from the transom. Or right up to the point is is lighter because your missing something back there.

"My 73' motor is very heavy, so I was hoping a newer one would be lighter"
Weight is not the only issue you need to be concerned with. Torque and forward stress are large contributing factors as well. There is a lot more to it than how heavy the boat or motor is or how long the boat is.

Take for instance, I have a 14' flat bottom that is rated for a 30 horse max.
My dad has a 14' that has a max rating of 25. And yet another buddy has a 14' that is rated for only 20 hp. All of these boats are within inches of each other and yet there is a 5 to 10hp rating difference.

Heres what you COULD think of. Buy the 70, then offer it for trade for a 50.

 

[1506cmo18]

Re: 14 ft fiberglass boat, will it hold a 75hp V4 evinrude

alright guys thanks,


I'm just getting very antsy because we've had 2 weeks straight of nice weather!! and I'd like to get my boat out

 

[metriccrescentwrench]

Re: 14 ft fiberglass boat, will it hold a 75hp V4 evinrude

Oh, that boat will plane out...right up to the point you want to come off of plane and swamp it from the transom. Or right up to the point is is lighter because your missing something back there.

Everyone, don't start assumin'.... Fer instance, I've got a 14-1/2 ft. fish-n-ski which is rated for 90 hp. With a 90 it does about 45 and handles well. It all depends on the boat's design. From the photo this boat looks narrower than mine, but it's hard to tell for sure.

HOWEVER, I wouldn't suggest upping the power that much without knowing for sure what the boat's rated for.