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Disclaimer:   I am not a spokesperson for the US Coast Guard or ABYC. For an official interpretation of regulations or standards you must contact the US Coast Guard or other organization referenced..   More.....
Disclaimer:   I am not a spokesperson for the US Coast Guard or ABYC. For an official interpretation of regulations or standards you must contact the US Coast Guard or other organization referenced..   More..... 

OUTBOARD ENGINE WEIGHT TABLE

Table 4 from 33 CFR 183 listing weights of outboard engines and associated equipment for determining flotation on boats.

This table is taken from The Code of Federal Regulations and is many years old. ABYC has a much more up to date table that accounts for more divisions of horsepower and for weights of four stroke engines.

WARNING! Should you decide to use the ABYC table, double check your calculations, to make sure that it meets or exceed the requirements of this table.

Table 4 from From 33CFR183
Weights of Outboard Motors and Related Equipment For Various Boat Horsepower Ratings
Boat Horsepower Rating
Motor and Control Weight
Battery weight
Full Portable Fuel Tank Weight
column
Dry
Swamped
Dry
Submerged
1+3+5
  1
2
3
4
5
6
.01 to 2
25
20
-
-
-
25
2.1 to 3.9
40
34
-
-
-
40
4.0 to 7
60
52
-
-
25
85
7.1 to 15
90
82
20
11
50
160
15.1 to 25
125
105
45
25
50
220
25.1 to 45
170
143
45
25
100
315
45.1 to 60
235
195
45
25
100
380
60.1 to 80
280
235
45
25
100
425
80.1 to 145
405
352
45
25
100
550
145.1 to 275
430
380
45
25
100
575
275.1 and up
605
538
45
25
100
750
  Transoms Designed for Twin Motors
 
50.1 to 90
340
286
90
50
100
530
90.1 to 120
470
390
90
50
100
660
120.1 to 160
560
470
90
50
100
750
160.1 to 290
810
704
90
50
100
1000
290.1 to 550
860
760
90
50
100
1050
550.1 and up
1210
1076
90
50
100
1400

The Following table is Table 4-2 from TP1332, the Canadian Standards

Table 4-2 Weights in Kilograms Of Gasoline Outboard Engines and related Equipment For Various Kilowatt Ratings.
1 2 3 4 5 6 7
Engine Power Categories Dry Weights + Fluids + Heaviest Propellor Controls Remote Oil Tank Dry Battery Weight Full Portable Fuel Tank Total Weight
HP KW Kg Kg Kg Kg Kg Kg
Single Engine Installations
0.1-2.0 0.0-1,5 13.7 0.0 0.0 0.0 0.0 13.7
2.1-3.9 1.6-2.9 18.2 0.0 0.0 0.0 0 18.2
4.0-7.0 3.0-5.2 40.9 0.0 0.0 0.0 11.40 52.3
7.1-15.0 5.3-11.2 60.0 0.0 0.0 9.1 22.7 91.8
15.1-25.0 113-18.7 104.5 0.0 0.0 20.5 22.7 147.7
25.1-45.0 18.8-33.6 119.5 4.6 0.0 20.5 45.4 190.0
45.1-60.0 33.7-44.8 157.1 4.6 0.0 20.5 45.4 227.6
60.1-75.0 44.9-56.0 183.9 4.6 0.0 20.5 45.4 254.4
75.1-100-0 56.1-74.6 203.0 4.6 0.0 20.5 45.4 273.5
100.1-145.0 74.7-108.2 254.0 4.6 11.4 20.5 45.4 335.7
145.1-220.0 108.3-164.1 256.1 4.6 11.4 20.5 45.4 338.0
220.1 & up 164.2 & Up 307.9 4.6 11.4 20.5 45.4 389.6
Twin Engine Installations
  37.6-67.2 238.8 9.1 0.0 40.9 45.4 334.3
90.1-120-0 67.3-89.6 314.2 9.1 0.0 40.9 45.4 409.6
120.1-150.0 89.7-112.0 367.7 9.1 0.0 40.9 45.4 463.2
150.1-200.0 112.1-149.1 405.9 9.1 0.0 40.9 45.4 501.3
200.1-290.0 149.3-216.4 508.0 9.1 22.7 40.9 45.4 626.1
290.1-440.0 216.5-0528.2 512.1 9.1 22.7 40.9 45.4 630.3
440.1 & up 528.3 & Up 615.8 9.1 22.7 40.9 45.4 779.3
American Boat And Yacht Council Westlawn Institute Of Yacht Design Boat Design Net Metal Boat Society Woodenboat Forum Wooden Boat Foundation
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