Oct 10

Oct 10 - Oct 12

Englewood Beach Waterfest

OS;R

Gulf of Mexico

Englewood, FL

Oct 11

Oct 11 - Oct 12

BATTLE ON THE SAN JACINTO

OPC

San Jacinto River

HIGHLANDS, TX

Oct 11 - Oct 12

Rockey Stone Memorial Kilos & Bu...

SE-PRO-KPH-MOD-SO-OPC;N-OB RR-J CLSES

Devils Lake

Lincoln City Oregon, OR

Oct 18

Oct 18 - Oct 19

2025 Fall Fling

PRO-KPH-MOD-SO-J CLSES

Lake Minden

Nicolaus, CA

Oct 18 - Oct 19

Orange Cup Regatta

INB

Lake Hollingsworth

Lakeland, FL, FL

Oct 25

Oct 25 - Oct 26

Blue Water Resort & Casino Bit P...

SE-INB-OPC

Colorado River

Parker, AZ

Oct 25 - Oct 26

Tabor City Halloween Regatta

MOD;R-PRO-SO-J CLSES

Lake Tabor

Tabor City, NC , NC

Nov 22

Nov 22 - Nov 23

University of Michigan Electric ...

SE

Lake Townsend

Browns Summit/Greensboro, NC

Nov 28

Nov 28 - Nov 29

Blue Water Resort & Casino 79th ...

INB-MOD-SO-OPC-J CLSES

Colorado River

Parker, AZ

Mar 13

Mar 13 - Mar 15

Spring Thunder Tavares Fl.

VINTAGE

Lake Dora

Tavares, FL

May 9

May 9 - May 17

2026 World Jet Boat Marathon Cha...

JRR;W

Payett,Salmon.Clearwater,Snake,St.Joe rivers

Emmet, Idaho , ID

May 15

May 15 - May 17

Thunder on Cocoa Beach

OS;N

Atlantic

Cocoa Beach FL, FL

Jun 5

Jun 5 - Jun 7

Rumble on the River

VINTAGE

Piney Point, Md.

City, ST

Jun 5 - Jun 7

Piney Point Rumble on the River

VINTAGE

St. George\'s Creek

St. George’s Creek, MD

Jun 6

Jun 6 - Jun 7

Hardys Race for the Lake

INB;N

Lake Decatur

Decatur, IL, IL

Jun 20

Jun 20 - Jun 21

Governors Cup Regatta

INB;D

Grand Lake St Marys

Celina, OH

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Modified Outboard Menu

Modified Outboard

Modified-Outboard

MOD racers aren't afraid to get their hands dirty - The goal in this category is to pull every last bit of horsepower out of your engine. In Modified Outboard, the engine builder's skill is just as important as the driver's. These boats are easily recognizable by their specially tuned pipes that make them as loud as they are fast. Because engines are constantly being modified to make the absolute most of what the rules allow, the competition is always fierce. Join the ranks of some of the best engine builders in the world, join Modified Outboard Racing.

Whether hydroplane or runabout, Modified classes are defined by the size of their engines (displacement). The numbers in the class names give you the approximate engine size in cubic centimeters. The 250ccMH, or 250 cubic centimeter Mod Hydro, is smaller than the 850ccMH, or 850 cubic centimeter Mod Hydro. Some classes have minimum weights, which increase with engine size. The smaller classes are often a good fit for younger, lighter drivers (14-year-olds may drive 200-250cc Mod classes, for example). The larger classes take considerable skill and experience. Propellers of four blades or less are used, and your prop choice can affect your speed enormously.

Modified Outboard Resources

Modified Outboard Classes