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

This topic has 10 replies, 7 voices, and was last updated 6 years, 7 months ago by mr-asa.

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October 5, 2017 at 9:01 pm #8399
mr-asa
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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
October 5, 2017 at 9:31 pm #65780
Mumbles
Participant
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.
October 5, 2017 at 11:00 pm #65784
garry-in-michigan
Participant
Lifetime Member
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. . . 😀
October 6, 2017 at 2:44 am #65797
mr-asa
Participant
quote Mumbles:

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.

quote Garry in Tampa:

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. . . 😀

Excellent info, Garry. I’ll edit the first post.
October 6, 2017 at 11:15 am #65803
davidk
Participant
US Member - 2 Years
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.
October 6, 2017 at 12:37 pm #65807
dave-bernard
Participant
US Member
6 gallon tank full is close to #40lbs
October 8, 2017 at 4:12 pm #65920
mr-asa
Participant
Long week, sorry for the delay.

quote DavidK:

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.

quote Dave Bernard:

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
October 9, 2017 at 2:50 am #65939
jeff-register
Participant
US Member - 2 Years
Big question!
Life jackets left behind? Account for everything please,
October 9, 2017 at 3:04 am #65940
1946zephyr
Participant
If you use a manual start 18, you’ll save a lot of weight
October 9, 2017 at 5:59 pm #65962
mr-asa
Participant
quote Jeff Register:

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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