Rough estimate for a boat loaded to go out on the water?

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Mr. Asa
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Rough estimate for a boat loaded to go out on the water?

Postby Mr. Asa » Thu Oct 05, 2017 5:01 pm

Howdy folks. Doing a project for a class.

I was wondering what I could expect a 14 foot fiberglass boat with aluminum prow deck and seats, and a remote steering system that's been prepped for a day on the water to weigh. I was hoping that everyone here would be able to get me a fairly close estimate, within 25lbs if possible?

The boat would be a '56-57 Herter's Mk III Runabout, claimed weight from the manufacturer was 210lbs, shipping weight was 265lbs
6 gallons of gas + tank would be 6.75lbs ? One gallon of gas is 6.22lbs, six gallons and associated would be 40lbs
'55 25HP Evinrude is (I believe) 85lbs ? EDIT: 118lbs + 9lbs electric start + battery and wiring (15-30lbs for an ATV/Motorcycle battery) -
Thanks Garry
Small anchor and rope, 16 lbs or so.

Things like tools and lifejackets would ride in the bed of the truck, so don't need to be accounted for.

Thanks
Last edited by Mr. Asa on Sun Oct 08, 2017 12:13 pm, edited 3 times in total.
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Mumbles
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Re: Rough estimate for a boat loaded to go out on the water?

Postby Mumbles » Thu Oct 05, 2017 5:31 pm

The weight of the gas would be close to six lbs per US gallon plus the weight of the tank and hose. Oil mixed with the gas would make it slightly heavier.
Still searching for a rudder and hardware to fit a KOBAN. ☺

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Garry in Tampa
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Re: Rough estimate for a boat loaded to go out on the water?

Postby Garry in Tampa » Thu Oct 05, 2017 7:00 pm

The 1955 Big Twin model is heavier - 118 pounds. Electric start would add 9 pounds (and the weight of the battery), a long shaft for a 20" transom would add 5 pounds. . . :D
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Mr. Asa
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Re: Rough estimate for a boat loaded to go out on the water?

Postby Mr. Asa » Thu Oct 05, 2017 10:44 pm

Mumbles wrote:The weight of the gas would be close to six lbs per US gallon plus the weight of the tank and hose. Oil mixed with the gas would make it slightly heavier.

I thought about the oil, but I didn't think it would change the weight much? For six gallons at 24:1 that's a quart. Neglected the hose and fittings though.

Garry in Tampa wrote:The 1955 Big Twin model is heavier - 118 pounds. Electric start would add 9 pounds (and the weight of the battery), a long shaft for a 20" transom would add 5 pounds. . . :D
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Excellent info, Garry. I'll edit the first post.
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DavidK
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Re: Rough estimate for a boat loaded to go out on the water?

Postby DavidK » Fri Oct 06, 2017 7:15 am

As Mumbles is suggesting (I think) the gas + tank would be 36.75 lbs....plus a quart of oil, not the 6.75 lbs you listed. You didn't edit that which makes me think you're missing it.
Last edited by DavidK on Fri Oct 06, 2017 8:40 am, edited 1 time in total.

Dave Bernard
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Re: Rough estimate for a boat loaded to go out on the water?

Postby Dave Bernard » Fri Oct 06, 2017 8:37 am

6 gallon tank full is close to #40lbs

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Mr. Asa
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Re: Rough estimate for a boat loaded to go out on the water?

Postby Mr. Asa » Sun Oct 08, 2017 12:12 pm

Long week, sorry for the delay.
DavidK wrote:As Mumbles is suggesting (I think) the gas + tank would be 36.75 lbs....plus a quart of oil, not the 6.75 lbs you listed. You didn't edit that which makes me think you're missing it.

Dave Bernard wrote:6 gallon tank full is close to #40lbs

Hey guys, I missed the conversion as I was heading out the door that night. Yes, one gallon of gas weighs 6.216lbs

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Jeff Register
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Re: Rough estimate for a boat loaded to go out on the water?

Postby Jeff Register » Sun Oct 08, 2017 10:50 pm

Big question!
Life jackets left behind? Account for everything please,

1946Zephyr
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Re: Rough estimate for a boat loaded to go out on the water?

Postby 1946Zephyr » Sun Oct 08, 2017 11:04 pm

If you use a manual start 18, you'll save a lot of weight

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Mr. Asa
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Re: Rough estimate for a boat loaded to go out on the water?

Postby Mr. Asa » Mon Oct 09, 2017 1:59 pm

Jeff Register wrote:Big question!
Life jackets left behind? Account for everything please,

They ride in the truck, so are not taken into account for this.

I'm trying to get the weight applied to the trailer tires and the hitch. The boat and everything that would ride in it are the only variables I can't figure out on my own right now.
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