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1820 Boat Weight ? Pictures?


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#1 519

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Posted 27 August 2009 - 08:06 AM

Finally weighed my 93 - 1820.


With 1/2 tank (30 gal.)
150 merc. 1 battery, no gear. 4000 lbs. (+or- 20lbs)

Is that normal? seems heavy to me.

Tried to add a picture, "attachment space used 7.81 of 7.81MB"

"X You did not select a file to upload"

I did select a reduced size pic. How do I get more space? :argue:

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#2 Robo 18

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Posted 27 August 2009 - 09:28 AM

I'm assuming this includes the weight of the trrailer?

#3 519

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Posted 27 August 2009 - 10:57 AM

No trailer weight included, boat only. Thanks

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#4 Bellbuoy2440

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Posted 27 August 2009 - 12:34 PM

I saw this and remembered I had an original sales brochure from 1996 when I purchased my Robalo. The 1820 is listed in there. I scanned the page and then converted it to an Adobe document which I think will make it easier to read. I realize your boat is a 1993 and may be different.



In the bottom right hand corner of the page it lists Approximate Weight with the engine. The note at the very bottom says it includes the weight of the standard engine which was a 125 hp.

Not sure if this will help.
Steve


#5 519

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Posted 27 August 2009 - 04:37 PM

Attached File  DSC00019.jpg   657.78K   29 downloads
Thanks for the info Steve.
The boat looks the same as mine, only 25 less h.p. and no fuel. = 2835 lbs.
I'm 4000
I've been having issues with getting up on plane.
Wonder how much water my foam can hold? :argue:

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#6 rotorwrench

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Posted 27 August 2009 - 06:19 PM

Mine scaled in @ 4500lb on the trailer with full fuel(300lb.), battery, full oil, anchor and electronics. Subtract 1000lbs. for the trailer, putting me @ 3500lbs. with the original 150 Mercury. 1992 advertised approx. weight of 2715 w/115 Mercury(bare boat, no fuel).

Figure 6lbs per gal fuel.
Bob
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#7 519

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Posted 27 August 2009 - 07:27 PM

I weighed the truck and trailer. 6,340 lbs.
Picked up boat, back to scales. 10,320 lbs.
Thats 3,980. add back fuel burned back to scales, I'm up at 4000.
I'm finally going to do the stator, switch box test on Saturday.
I'll get on plane someday!

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#8 ReelPlumber

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Posted 27 August 2009 - 08:36 PM

519, according to the figures 1165lbs your carring 30 gallons of fuel @ 7.5 = 225lbs. 1165-225=940. 200lb margin of error would =740. 740/8.33 = about 89 gallons of water. :argue: :argue:

By chance did you name your boat "Camel"?

Even if you give a margin of error on the year and weight you still are carring a bunch of water.

You think thats possible?

I don't do enough fishing. Things have got to change!


#9 519

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Posted 27 August 2009 - 08:58 PM

This boat has a history of being a pig, out of the hole. :argue:
89 gal. is a lot of wine :argue:
I'm going to grab a piece of rebar at the yard, and poke thru the drain.
Does #4, 1/2" fit?
I feel like a fat girl. :argue:

Edited by 519, 27 August 2009 - 08:59 PM.

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#10 Fly2xs

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Posted 27 August 2009 - 09:28 PM

519,

I have the same problem (slow to plane) issue and need to weigh my boat also. May I ask, what is the min RPM that you must maintain with 1/2 fuel and 1 or 2 people to stay on plane? Me.....around 4,000. When I have a full tank of fuel and a few passengers, I have everyone move upfront to get on plane a little quicker.

May I ask you do this, open the access hole cover under your oil tank and reach down there with your hand and and fee/grab the foam. Mine was wet, very wet and I have no clue how water has gotten in there. My rear scupper's seem to be always below the waterline when the boat is at rest. I plan on moving my batteries under the center console and adding some sort of weight in the anchor locker.



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#11 519

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Posted 27 August 2009 - 09:35 PM

I'll check the oil res. area, and let you know how wet it is. (I think the foam is glassed over)
4200 rpm seemed to keep me on plane.

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#12 519

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Posted 27 August 2009 - 09:41 PM

Your name Fly2xs,
Reminds of one of the best boat names i've ever seen.
"SMALL FLYING PATIO FURNITURE"
Or are you a framer? lol

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#13 mr.g

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Posted 27 August 2009 - 10:22 PM

I have an 1981 1820. The foot print of my boat is slightly smaller and I carry about 48 gallons of fuel. I have gone over the weight issue and I feel 2800 loaded is about right for my year (going by the specs). I buit in a 20 gallon fresh water shower so add maybe another 100 lbs. I think Robalo is heavier than advertised so maybe add another couple hundred lbs.
I have a 150 Johnson if you want to get weight technical.
As far as planing I put some Hydrofoiles on (smallest I could get for my motor) and it does help getting on plane (good hole shot). Once there I trim my motor and can pull back to about 3200 and run nicely at about 28 MPH.
Don't know if it helps but my 1 1/2 cents.
Karl (aka mr.g)


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#14 2-N-TOW

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Posted 28 August 2009 - 05:18 AM

On my 2160, I have to push the motor up to 4,000 to get on plane, then I can pull back to 3,200. Trimming in will also help get it on plane easier...once up, trim back to nuetral.

As for the weight issue, I am willing to bet that on the older boats (pre-1990...before the bean counters dictated how to build a boat), the amount of glass and resin used in the production boats was more than what they used in their initial hulls that the specs were published from.

Water and foam....water can seep in there a number of ways. I would guess most boats get rainwater trapped under the deck just through topside and deck penetrations. Once under the deck, it will gradually work its way down to the bottom of the hull. Now, here is where the problem starts. Boats have stringers that run the full length of the hull, effectively creating compartments. If there is no way for the compartments to drain down to the lowest point in the hull, they are going to hold this water. Boats normally have limber holes in the stringers at the transom to allow the water to drain down to the bilge. A lot of times these holes get plugged up with debris and over time get sealed off. Other times, they may not get drilled during construction.

If you can find a way to drill some holes in the stringers (one hole on each side of the bilge stringers, down at the bottom where the hull bottom and transom meet, then completely seal the surface of the hole so as to prevent water intrussion into the stringer material, I think this will help eliminate a lot of the water weight issue.

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#15 mrrobalo

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Posted 28 August 2009 - 06:52 AM

Dan is right about bean counters being around.
When a new model is first built it is built so to say out of buckets. This way they get a true cost of goods in each boat with a variance of lets say 3% . OK now lets jump into reality on the production line .....there are numerous hulls.liners, decks, and small parts being laid up completely by hand (no robot or chopper gun) by a group of people . Usually there are 1-2 resin guns being used while all these parts are in various stages of build. Buckets of resin were always around the area . If the glass is put in and it's wetter it is easier to work with and that's what happens. Yes the hull is weighed (always over but thats all) so you end up with a boat weighing in a lot more almost all the time. Also back then HP wasn't varied as it is now and robots do as programed so you didn't want to put in the weight especially when Kevlar was just starting to come about (lighter=faster in the mind) so YES they are one of the heaviest boats on a production line built.

Just my 2 cents worth.

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#16 519

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Posted 28 August 2009 - 09:13 AM

Thank you all, for the input.
:argue:

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#17 rotorwrench

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Posted 28 August 2009 - 04:00 PM

519, according to the figures 1165lbs your carring 30 gallons of fuel @ 7.5 = 225lbs. 1165-225=940. 200lb margin of error would =740. 740/8.33 = about 89 gallons of water. :o :yahoo_think:

By chance did you name your boat "Camel"?

Even if you give a margin of error on the year and weight you still are carring a bunch of water.

You think thats possible?


Lee,
What are you using for a gallon of fuel reference?

For reference:
Auto fuel=6lb./gal.
Kerosene=6.7lb./gal.
Diesel=7.3lb./gal.
Oil=7.5lb./gal.
Water=8lb./gal.
Bob
'92 Robalo 1820cc/'07 Evinrude Etec 150HO

#18 ReelPlumber

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Posted 28 August 2009 - 05:21 PM

Lee,
What are you using for a gallon of fuel reference?

For reference:
Auto fuel=6lb./gal.
Kerosene=6.7lb./gal.
Diesel=7.3lb./gal.
Oil=7.5lb./gal.
Water=8lb./gal.



Ooops, sorry, (5.93 to 6.42 lbs), depending on temperature, type and blend (e.g. with methanol, water, benzene etc.)

I don't do enough fishing. Things have got to change!





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