Originally known as Auto Engine Works and later known as Capitol Gears Inc. Capitol Marine Transmissions were originally manufactured in St. Paul Minnesota USA.

Capitol Marine Transmissions were highly sought after for there rugged design and simplicity. Many of them are still working effectively today after many years of service.

In 1990 Capitol Gears Inc. closed it's doors and stopped production of original parts.

We currently offer a wide range of aftermarket parts that can assist you in keeping your transmission running. With our network of sales and service centers we are very capable of answering any questions you may have on the operation of your transmission and can supply high quality aftermarket replacement parts.


Friction Disc's for Marine Gears

We offer a broad range of friction products from quality manufacturers.

Product Design and Development

Product Design and Development

Transmission Models

12 Drop Center type reduction models and 4 In-Line Direct Drive (1:1 ratio) models

Capitol Marine Gear - Gear Parts and Assemblies

We have a complete offering of spare parts and assemblies for your Capitol Marine gear.

Capitol Gear Clutch Assemblies

Capitol Gear offered 4 standard sizes of clutch assemblies.

Capitol Marine Gear - Service Manuals & Part Lists

Download the installation & maintenance, service & repair and parts information manuals.

A list of helpful links.  From unit converters to world clock and time zone information.

A helpful dimension sheet detailing Industrial flywheel and housing characteristics.

Power, Torque, and overhung load calculators weights of steel bar and plate.