is a 50hp.evinrude to heavy for 14ft. aluminum

[blackwidow]

is a 50hp. to heavy for 14ft. aluminum 70 inches wide. i completely turned it into tracker type boat, new 5/8 plywood front to back.

 

[hardwater fisherman]

Not only might it be too heavy. But it might be over powered as well. What is the hp rating for this boat?

 

[gm280]

First things first blackwidow, :welcome: to iboats. Great to have you aboard.

Does you boat have a capacity plate installed on it? If so then all the answers to your inquiry is there. If not then what manufacture is your boat. 70" wide is a pretty nice size. So it is near impossible to know what the boat is capable of handling without more info. Post a few pictures for everybody to see what you're working with and we can offer better engine sizes. JMHO!

 

[blackwidow]

thanks for your input. I should have checked first. I bought a 1994 40hp evinrude good compression, tilt and trim,with controls. 650.00. I believe it was a great deal. runs great. your thoughts!!! good buy??

 

[blackwidow]

while I have you guys on here, I bought a 40hp. not 50hp. should have reread, before posting. the reason I bought it is I'm having a problem with my 28hp. it would run great full throttle but not idle. my friend rebuilt carb, replaced some type fan blade looking part. idles great, but when going to full throttle runs about 20 to 30 yards then shuts off like it runs out of gas. what's the problem?

 

[fhhuber]

Just for comparison...

Alweld, current Jon boat hulls.

Their length : width : HP chart shows they don't get to 70 inches wide until their 16 ft or longer hulls. (for Jon Boats) The 16 that is 70 wide is rated up to 40 hp and is a deep + wide hull.

The 14 ft are all 52 inch wide or less and rated 25 hp.

Without a label plate, I'd look at the site for your hull's maker (if you can find that) and see what the closest hull they make now is rated. That should be a reasonable guide for max HP and load.

 

[gm280]

while I have you guys on here, I bought a 40hp. not 50hp. should have reread, before posting. the reason I bought it is I'm having a problem with my 28hp. it would run great full throttle but not idle. my friend rebuilt carb, replaced some type fan blade looking part. idles great, but when going to full throttle runs about 20 to 30 yards then shuts off like it runs out of gas. what's the problem?

Check the fuel pump.

 

[Stumpalump]

Todays fuel in anything other than a sealed fuel injected system is your problem. If you use it then you must know how to maintain and fix every single thing the fuel touches. My similar engine had the same problem. Bought the running used boat and before I took it out I pulled and cleaned the built in fuel tank. I replaced the fuel filter. It died just like yours. Next came carb kits. It died. Fuel pump kit. Nope. Fuel lines can degrade and collapses so I replaced them. Nada... Now I was down to the fuel line connector and the primer bulb. Ding! The bulb worked but not well. It would slow the fuel and starve the engine. You can pull the ends out of the bulb and clean the reed valves. Basically every single part of your fuel system from tank pickup to carb jets can cause slow or no fuel.

 

[ondarvr]

Like mentioned, there should a plate that will tell you what it's rated for, 40 may be fine, or it could well over powered, it just depends on the design. 5/8 ply is probably more than you needed, 1/2 (sometimes less) should do it. Extra weight is your enemy.

 

[jrttoday]

opinions vary, but facts are facts. I built a 15'4" fiberglass Bass or Flats or whatever I'm fishing for... The Coast Guard has a formula for rating boats. I had a 100h Johnson and am putting a 115 on it now. Two Marine Police Officers came out to issue HIN#; after a thorough inspection, both agreed within specs.

It has 1/2" floor decking all glassed in, and I'll tell ya, that is a lot!!! But considering the power, it adds to the overall strength of the hull and boat - because the neck bone's connected to the.... lol
How much freeboard are you gonna have with that weight?

 

[fhhuber]

Regardless of the Coast Guard formula...

If the manufacturer's label says less than that formula then its a very bad idea to exceed the manufacturer's rating.

 

[blackwidow]

I decided to measure my boat again. I'm not sure where you measure, from top edge, front to back 14ft. from top edge, side to side in the rear of boat is 70 inches if on the outside edge, across the bottom inside it is only 52inches. it's a 1984 alumacraft. I first cut a piece of 1/2 inch plywood, seemed to flex to much, so went with 5/8. someone said it could be my enemy, I can see where the extra weight could cause a problem, but when I stand up it's much more stable than before. i lined the whole bottom with 1 1/2 inch poly insulation board, in hopes it would make it more buoyant.

 

[blackwidow]

What do you guys mean when you say overpowered? I don't take off fast and I'm not into speed. I have an aluminum plate that extends up to allow a long shaft to be mounted. My 28hp is also a long shaft. To be truthful it concerns me that the 40hp is heavier and would cause more leverage in the back, making it much more difficult to plane out.

 

[F_R]

"Leverage" might rip the transom out. But I doubt it is going to make it difficult to plane out. Weight could make a big difference in ability to plane out, or get out of the hole as they say.

Don't underestimate that 50hp motor. That thing packs a lot of power in a small case.

 

[blackwidow]

F-R in my original post I put 50hp. should have reread before posting. it is only 40hp. I only bought the 40hp. because I was frustrated with my 28hp. not running good. last winter I remodeled the whole boat, only had it out 3 times. I certainly don't want to rip out the transom. it has to be redone before spring anyway. this 40hp was a really good deal at 650.00, 130 psi, tilt and trim plus controls, runs good. I believe it will bring at least 1000.00 a month from now when everyone gets fishing fever.

 

[blackwidow]

well guys thanks for all the input, talked to a boat motor mechanic here, he said the 40 would be ok, but he was checked by coast guard, had over rated motor,they fined him 500.00. he also knew of a guy that had someone run into his pontoon , when he was checked, to large motor, they not only fined him 500.00, he was also banned form all ohio lakes for 1 year. ouch!!!! checked my sticker, only rated for 25hp. I believe most parts on my 28hp will interchange with a 25hp. my nephew has. Mines a 1986 his is a 1989. am I correct? thanks again guys,

 

[F_R]

40 sounds better than 50. I have 35 on my 14' aluminum. Performs great. When new it used to hit almost 40 MPH, but now that it's beat up somewhat, more like 34 MPH. Sure wouldn't want to hang a 50 on it. Your experience may vary.

 

[Chrisravosa36]

Im hanging a 50hp off a 13 1/4 foot fiberglass runabout, only rated for 40! I think if you are able to controll the boat well, you should be fine. If it feels unstable at all, look into smart tabs or a new 4 bladed prop, both of those option would help with stabilizing in turns and getting on plane easier and quicker, good luck!!

 

[tommarvin]

I bet the 28 has a carb problem, tear it apart completely spray clean all holes and openings, blow air through every opening, and get a new rebuild kit from Iboats.com.

Then get a free factory service manual from www boatinfo.no/lib/library.html, click your make,find your motor, find carb, and put it back together just like the manual,. don't forget to adjust the float.

 

[fhhuber]

18 ft fiberglass bass boat might be rated 200 hp... 18 ft Aluminum bass boat might be rated about 90.
Then there's the inboard/outboards where an aluminum might have a much bigger engine...

You can't compare the ratings of a fiberglass boat with an aluminum based on length and expect it to be meaningful.

How the boat is built matters.