Sep 12

Sep 12 - Sep 13

Wolfeboro Vintage Race Boat Rega...

VINTAGE

Lake Winnipesaukee

Wolfeboro, NH, NH

Sep 12 - Sep 14

San Diego Bayfair

INB-KPH-UNL

Mission Bay/ Fiesta Bay

San Diego, CA

Sep 13

Sep 13 - Sep 14

Roar of the Rockies

OPC

Eaton Ditch

Windsor, CO

Sep 13 - Sep 14

Mecosta County Regatta

SO-J CLSES

Muskegon River

Big Rapids, MI

Sep 13 - Sep 14

Crystal Lake Regatta 2025

SO;D-MOD-J CLSES

Crystal Lake

Redwood, NY

Sep 13 - Sep 14

New Jersey State Championships /...

INB

Lake Hopatcong

Landing, NJ

Sep 13 - Sep 14

Lake Lawrence World Record Regat...

PRO-KPH-MOD-SO-J CLSES

Lake Lawrence

Yelm, WA

Sep 20

Sep 20 - Sep 21

Vintage Thunder

SE-VINTAGE

Ohio River

Madison , IN

Sep 20 - Sep 21

17th Annual Steve Noury Kingsto...

MOD-SO-J CLSES

Greenwood Pond

Kingston, NH

Sep 20 - Sep 21

Moses Lake Vintage Hydroplane Ev...

VINTAGE

Moses Lake

Moses Lake, WA

Sep 20 - Sep 21

Hurricane on the Chain

PRO-MOD-SO-J CLSES

Lake Marie

Antioch, IL

Sep 21

Sep 21

COMBATE BOAT EXPERIENCES

MOD

PLAYA EL COMBATE

CABO ROJO, PUERTO RICO, FL

Sep 26

Sep 26 - Sep 28

CLEARWATER OFFSHORE NATIONALS

OS;N

GULF OF MEXICO

keywest, FL

Sep 27

Sep 27 - Sep 28

Manson Hydrofest

VINTAGE-INB

Lake Chelan

Manson, WA

Sep 27 - Sep 28

RegattaFest

OPC

Ohio River

New Martinsville, WV

Sep 27 - Sep 28

Hampton Cup Regatta

INB

Mill Creek

Hampton, Virginia , VA

mobile menu
expand
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