HP FOR 16FT JOHN BOAT

[n8dogg1616]

I HAVE A 16FT FLATBOTTOM BOAT THAT NEEDS A NEW ENGINE. WILL A 25HP MERCURY 2 STROKE MOVE THIS THING?

 

[cpahl_99]

Re: HP FOR 16FT JOHN BOAT

I just bought a 9.9 2 stroke Mercury for my 14ft jon boat. I would say 25hp would do the job

 

[cobra 3.0]

Re: HP FOR 16FT JOHN BOAT

What's the boat rated for? Is this an aluminum boat? Any idea on it's weight?

 

[matt88]

Re: HP FOR 16FT JOHN BOAT

The answer to this question would help me also. I currently have a waterlogged dory but am thinking about buying a used 16x 5 or 6? flat bottom jon boat. I was wondering if my 30hp tohatsu would push it fast enough to plane out with 3 or four people. Im not sure because my current waterlogged boat will not plane out with more than two people. Even though the jon is bigger I figure it should still be lighter. I cant even lift the rearend of my current boat off the trailer and Im 6ft 3in 250lb. It is very over weight. Hoping the new one will be completely different. thanks

 

[coolguy147]

Re: HP FOR 16FT JOHN BOAT

id say 40hp min. 30hp be good for 1-2 people. u have to remember this is a 16ft boat not a 14ft.


whats the max hp rating

 

[coolguy147]

Re: HP FOR 16FT JOHN BOAT

oh yeah but rule of thumb 70% of max hp rating to be accetable

 

[matt88]

Re: HP FOR 16FT JOHN BOAT

Im not sure It does have a 40hp on it now but I was buying it without the motor and using mine for financial reasons. I was planning on trying to work a trade out with my outboard for the 40hp but not real sure if that will work. Was hoping the 30hp would be sufficient. thanks for the reply

 

[coolguy147]

Re: HP FOR 16FT JOHN BOAT

ya it will be fine to use a 30hp motor. just after maybe some fine tunning weight distrubtion. different props. tilt adjustments.

mainly when u have a full load try different wieght styles and such.

u also just wanna be able to plane so ur weight might have to be on the front a bit.

ya it will work

 

[coolguy147]

Re: HP FOR 16FT JOHN BOAT

ya it will be fine to use a 30hp motor. just after maybe some fine tunning weight distrubtion. different props. tilt adjustments.

mainly when u have a full load try different wieght styles and such.

u also just wanna be able to plane so ur weight might have to be on the front a bit.

ya it will work

u might get about 22-26 mph with the motor.

 

[matt88]

Re: HP FOR 16FT JOHN BOAT

I appreciate it guys if I can plane out and get 22-26mph with a fairly decent load Ill definitely be happy for a while. Atleast till next summer anyways lol.. You know how it is always wanting a bigger and faster one than what you have,atleast I do. thanks again

 

[coolguy147]

Re: HP FOR 16FT JOHN BOAT

i think it should plane easily since its flat bottom but still when u need that extra horses u know from running away from the cops dont blam us

 

[Wee Hooker]

Re: HP FOR 16FT JOHN BOAT

My buddy runs a 17' G3 aluminum bass boat w a 25 merc. He gets 28 on the speedo and that boat is allot heavier than yours. The only time it struggled to plane was whne we loaded up 1000# worth of gear for a camping trip.

My 16' V hull aluminum gets 28 on the gps fully loaded and with two big guys with a 30.

I'd say a 25 or 30 would do it fine but if you plan to load 3-4 guys in regularly, you'll need the 40.

 

[Willyclay]

Re: HP FOR 16FT JOHN BOAT

Your 25 sounds about right to me. Take a look at the formula USCG uses:

http://edocket.access.gpo.gov/cfr_2004/julqtr/pdf/33cfr183.53.pdf

If your boat is flat-bottomed with NO remote steering AND less than a 20inch transom, the formula should be: Power Factor(LxW) X 0.5-15= Maximum HP

Using this calculation, I get 25HP max for a 16 ft boat with a 5ft transom.

Good luck, be safe!

 

[papamike]

Re: HP FOR 16FT JOHN BOAT

I have a 16 foot semi vee polar craft with a 25 hp mariner on it and with just me in it 250 lbs. it will flat out fly. probably 25mph or so.loaded with two buddies to hunt or fish not very much difference maybe 20 or so.

 

[jauguston]

Re: HP FOR 16FT JOHN BOAT

I have a 1448 Crestliner Jon (14'X48" bottom) with a '92 Evinrude 15. Boat weights about 260# It will run 25 mph on GPS with me alone and 20 mph with me and DW.

Jim