Jul 26

Jul 26 - Jul 27

Rumble in the Hills

VINTAGE-INB

Rocky Fork State Park

Hillsboro, OH

Jul 26 - Jul 27

Franks Race

OB RR

Klamath River

Klamath, CA

Jul 26 - Jul 27

Serpent Lake Powerboat Races

OPC

Serpent Lake

Crosby, MN

Jul 28

Jul 28 - Aug 2

2025 Stock, MOD, & J Outboard Na...

MOD-SO;N-J CLSES

Champions Park Lake

Springfield, OH , OH

Aug 2

Aug 2 - Aug 3

Great Lakes Grand Prix

OS

Lake Michigan

Michigan City Indiana, IN

Aug 2 - Aug 3

BATTLE ON THE COLORADO

OPC

LAKE MARBLE FALLS

MARBLE FALLS, TX

Aug 2 - Aug 3

Thunder on the Niagara

SE-VINTAGE-INB

Niagara River

North Tonawanda, NY

Aug 2 - Aug 3

Seafair Hydroplane Race

VINTAGE-INB-UNL-J CLSES

Lake Washington

Seattle, WA

Aug 8

Aug 8 - Aug 10

Sheboygan MidWest Challenge

OS;N

Lake Michigan

Sheboygan, WI

Aug 9

Aug 9 - Aug 10

Mott Lake Regatta

VINTAGE-INB

C.S. Mott Lake

Genesee Township, MI

Aug 9 - Aug 10

Powerboats at the Park Vintage R...

VINTAGE

Elizabeth River

Portsmouth , VA

Aug 9 - Aug 10

TCPBA Chetek Watermania VI

OPC

Lake Chetek

Chetek, WI

Aug 9 - Aug 10

Top O Michigan Marathon National...

SO;N-J CLSES

Inland Waterway

Indian River, MI

Aug 16

Aug 16 - Aug 17

Liqui-Moly Pro Watercross Triple...

PWR;N

Lake Verona

Avon Park, FL

Aug 16 - Aug 17

Ron Baker Sr. Regatta

OPC

Forest lake

Forest Lake, MN

Aug 16 - Aug 17

Clash at Cougar Lane

OB RR

Rogue River

Agness, OR

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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