Heres the actual rule for BASS...
https://www.bassmaster.com/sites/default/files/2018_open_rules_final.pdf"Maximum horsepower for all outboard motorboats used in official tournament practice
and in tournament competition will be 250 horsepower. Horsepower cannot exceed the
limitations set by the U.S. Coast Guard. When required, each boat must have a U.S.
Coast Guard horsepower-rating plate attached to the boat by the manufacturer. The
horsepower of the outboard engine must NOT exceed the rating specified on this plate
nor the horsepower maximum set by B.A.S.S. Each competitor agrees to submit, by
their signature on the official entry form, the boat and outboard motor used in the
tournament, to an inspection by factory-trained personnel, if there is reason to suspect
the horsepower is in excess of the rating. Normal maintenance of engines is allowed.
Changing or altering standard factory parts of a competitor’s engine to increase the
horsepower over the factory horsepower rating, is forbidden and will result in
disqualification. Falsifying information on entry forms, or altering the horsepower-rating
numbers on the engine, is also cause for immediate disqualification from B.A.S.S.
tournaments. Posted speed limits and those imposed by B.A.S.S. must be observed
and all boats must be operated in a safe manner. Violations of speed limits shall result
in loss of competition hours and not limited to disqualification."