Boat Weight

marauder11

Petty Officer 2nd Class
Joined
Oct 10, 2011
Messages
176
Hey all, I have been trying to figure out if the scale weight i have is close to the weight my boat should be. I guess in my mind if the weight is close to what the scale says it should mean i am not hauling around a boat full of saturated foam.

So my boat has an approx weight of 1350 lbs.
The motor weights 365 lbs.
Trailer was 550 lbs.

Now is the oil tank and battery included in any of the weights above. I know fuel won't be included.
 

bonz_d

Vice Admiral
Joined
Apr 22, 2008
Messages
5,276
Guess before anyone can answer that they would 1st need to know what boat you are discussing. They would then need to know what the advertised dry weight of the boat was. Then you can add up all the extras that were added.
 

jbcurt00

Moderator
Staff member
Joined
Oct 25, 2011
Messages
25,109
um, what boat?

435lbs (1350-(550+365)=435) seems awful light for a boat capable of supporting a 365lb motor.

If you got weighed at a scale, why is the total an approximately 1350lbs?
Hey all, I have been trying to figure out if the scale weight i have is close to the weight my boat should be. I guess in my mind if the weight is close to what the scale says it should mean i am not hauling around a boat full of saturated foam.

So my boat has an approx weight of 1350 lbs.
The motor weights 365 lbs.
Trailer was 550 lbs.

I dug thru your history, and this is the 2002 Glastron SX170, correct?

It's listed as being 1350lbs, for the bare boat alone, so your approx weight above isn't including trailer or motor. I don't know if the factory rigged the OB or the original selling dealer did, but either way, no, the oil IN the oil injection tank for the 2cyl outboard oil, would not have been included in the weight, nor would the fuel. So those weights need to be deducted from the boat/motor/trailer weight from the scales when you drive across them.

Batteries, maybe, but at 80lbs of a total 1350lbs, the battery would only be 6% of the total, about the weight of a 6th grader or about 10gals of water. If you're carrying water weight, I'd bet it's more then 80lbs/10gals.

I'd bet a 2001 Johnson 135 weighs every bit of 365lbs.

Ultimately, yes, if you start w/ the weight of the boat, motor and trailer from a scale, and can figure out what the weight of the bare boat is, you should have a rough estimate of whether or not there's water trapped below decks by comparing that amount to 1350lbs.

FYI, the J135LSI Johnson outboard model # you posted in your other topic, isn't wholly accurate, these are the 2001 Johnson 135s:
 
Last edited:

marauder11

Petty Officer 2nd Class
Joined
Oct 10, 2011
Messages
176
Ok sorry seem to have added some confusion.

Boat approx weight is 1350 Lbs
motor weight from manual is 365 lbs
Trailer weight from manual is 550 lbs
27 liters of fuel in tank multiplied by .77 kg/l x 2.2 to get to pounds = 45 lbs

total is 2310 lbs

Scale was at 1070 kg or 2354 lbs.

I have not included oil tank or battery.
 

bonz_d

Vice Admiral
Joined
Apr 22, 2008
Messages
5,276
By the numbers you just posted above I'd say you are right on target.My boat sits on a Shoreland'r trailer which their site puts the "shipping weight" at 550lbs. Now I have moved and lifted this trailer w/o the boat on it and I'm guessing the advertised weight is over stated.
 
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