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OUTBOARD MOTOR WEIGHTS

Table from 33 CFR 183.75  listing weights of outboard engines and associated equipment for determining flotation on boats.

The following tables are from ABYC standard S-30 dated July, 2017, and have been adopted by the U. S. Coast Guard as of June 1, 2018. Manufacturers must use these tables to calculate flotation requirements. If at some future date ABYC updates this table, you may use the updated table, but calculate amounts of flotation using this table and the updated table.  If the updated table provides less flotation then you must use this table to comply with the regulations.  If the updated table provides the same or more flotation, then you may use the updated table.  SEE US Coast Guard table (pdf format) http://www.uscgboating.org/regulations/assets/builders-handbook/USCG%20-%20Table%20183.pdf

Table 1A - Weights (in Pounds) Of Gasoline Outboard Engines and Related Equipment for Various
Rated Power (Horsepower) Ranges
1 2 3 4 5 6 7 8 9
Engine Power  Dry Running Swamped Controls and Battery Weight Full Portable total Weight
Range (HP) Weight Weight Weight Rigging Dry Submerged Fuel Weight Sum of Cols.
3,5,6,8
      Single Engine Installations        
0.1 -2.0 30 32 27 0 0 0 0 32
2.1 - 3.9 42 44 37 0 0 0 0 44
4.0 - 6.9 66 69 59 0 0 0 25 94
7.0 - 10.9 105 110 94 5 20 11 50 185
11.0 22,9 127 133 113 6 45 25 50 234
23.0 - 34.9 187 196 167 9 45 25 100 350
35.0 - 64.9 286 300 255 14 45 25 100 459
65.0 - 94.9 439 461 392 22 45 25 100 628
95.0 - 104.9 458 481 409 23 45 25 100 649
105.0 - 144.9 526 552 469 26 45 25 100 723
145.0 - 194.9 561 589 501 28 45 25 100 762
195.0 - 209.9 652 685 582 33 45 25 100 863
210.0 - 300.0 699 734 624 35 45 25 100 914
300.1 - 350.0 884 928 789 44 45 25 100 1117
      Multiple Engine Installations.        
For multiple engine installations, multiply the final value in column 9 by the number of engines    
Notes:
1.  Dry weight is the marine engine manufacturer's published weight for the shortest midsection increased
by 10% to account fo the longer midsections and additional required hardware usually not include in published weights. The weight is intended to represent the heaviest model in each power
 category. For boats designed with a transom height of 20 inches or less, the weight in
column 2 may be reduced by 10%. Recalculate columns 3, 4 and 9 as appropriate.
 
2. Running weight is calculated as105% of dry weight to account for fluids (including 2 stroke oil) and the heaviest recommended propeller.
 
3.  Swamped weight is 85% of running weight.
4.  Controls and rigging is calculated as 5% of dry weight to account for engine related hardware required to complete the installation (e.g. controls, cables, hydraulic hoses, steering pumps and cylinders).
 
5.  If the boat is equipped with a permanent fuel system and is not intended to use a portable tank, the portable fuel tank weight may be omitted, provided the weight used is not less than 33 CFR part 183 subpart H, Table 4, column 6. For monohull boats less than 20 ft. (6.1 m) in length, Title 33 CFR part 183.41 requires that the boat be tested with the weight of the full portable fuel tank as shown in column 8.
6.  For diesel outboards replace the value in column 2 with the manufacturer's published dry weight + 10%.
7.  For jet drive outboards use the values of column 2 or the manufacturer's published dry weight whichever is greater.
© 2017 American Boat and Yacht Council
Table 1B - Weights (in Kilograms) Of Gasoline Outboard Engines and Related Equipment for Various
Rated Power (Kilowatt) Ranges
1 2 3 4 5 6 7 8 9
Engine Power  Dry Running Swamped Controls & Battery Weight Full Portable total Weight
Range (kW) Weight Weight Weight Rigging Dry Submerged Fuel Weight Sum of Cols.
3,5,6,8
      Single Engine Installations        
0.1 - 1.5 14 15 12 0 0 0 0 15
1.6 - 2.9 19 20 17 0 0 0 0 20
3.0 - 5.1 30 31 27 0 0 0 11 43
5.2 - 8.1 48 50 43 2 9 5 23 84
8.2 - 17.1 58 60 51 3 20 11 23 106
17.2 - 26.0 85 89 76 4 20 11 45 159
26.1 - 48.4 130 136 116 6 20 11 45 208
48.5 - 70.7 199 209 178 10 20 11 45 285
70.8 - 78.2 208 218 185 10 20 11 45 294
78.3 - 108.0 239 250 213 12 20 11 45 328
108.1 - 145.3 254 267 227 13 20 11 45 346
145.4 - 156.5 296 311 264 15 20 11 45 391
156.6 - 223.7 317 333 283 16 20 11 45 415
223.8 - 261.0 401 421 358 20 20 11 45 507
      Multiple Engine Installations.        
For multiple engine installations, multiply the final value in column 9 by the number of engines    
Notes:
1.  Dry weight is the marine engine manufacturer's published weight for the shortest midsection increased
by 10% to account fo the longer midsections and additional required hardware usually not include in published weights. The weight is intended to represent the heaviest model in each power
 category. For boats designed with a transom height of 20 inches or less, the weight in
column 2 may be reduced by 10%. Recalculate columns 3, 4 and 9 as appropriate.
 
2. Running weight is calculated as105% of dry weight to account for fluids (including 2 stroke oil) and the heaviest recommended propeller.
 
3.  Swamped weight is 85% of running weight.
4.  Controls and rigging is calculated as 5% of dry weight to account for engine related hardware required to complete the installation (e.g. controls, cables, hydraulic hoses, steering pumps and cylinders).
 
5.  If the boat is equipped with a permanent fuel system and is not intended to use a portable tank, the portable fuel tank weight may be omitted, provided the weight used is not less than 33 CFR part 183 subpart H, Table 4, column 6. For monohull boats less than 20 ft. (6.1 m) in length, Title 33 CFR part 183.41 requires that the boat be tested with the weight of the full portable fuel tank as shown in column 8.
6.  For diesel outboards replace the value in column 2 with the manufacturer's published dry weight + 10%.
7.  For jet drive outboards use the values of column 2 or the manufacturer's published dry weight whichever is greater.
 
© 2017 American Boat and Yacht Council

Revised 06/23/2018.