Superior Marine Service, Inc.

4405 East US 12 ~ Michigan City, IN 46360 ~ (219) 879-5636

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Diesel Fuel Cleaning

Tohatsu Outboards

Yanmar Diesel Engines

Yanmar engines go further and they work harder, year after year. Yanmar diesel engines are renowned for their rugged reliability.

With their economical operation and reduced downtime, it’s little wonder that successful water sports professionals rely on Yanmar for enduring power. Little wonder that major charter fleet operators turn to Yanmar. Little wonder that award-winning boat designers specify Yanmar from the start.


The YM series engine from Yanmar sets the standard for small diesel engines. A larger piston bore gives greater power to the prop on this smooth running package. Emission levels are the lowest in the history of this engine class, and the exhaust is soot free. This replaces the GM series.


The 3JH3E 3-cylinder and the 4JH3E 4-cylinder naturally aspirated pair of engines have been joined by three new release 4 cylinder engines, the 4JH3-TE (turbo), the 4JH3-HTE (intercooled-turbo) and 4JH3-DTE (hi-power intercooled turbo), to create a family of five lightweight, user-friendly, clean, thrifty and reliable marine diesels.


The beautiful simplicity of this compact drive system makes it the sensible choice for numerous types of boats. With no problems from leakage, the Saildrive has truly earned its name as a "Safedrive" system. Its dual diaphragm design virtually eliminates leaks. The design also eliminates shaft vibrations as well as noise, alignment and stuffing box problems. The logical power to prop direct drive combines all the advantages of the outdrive-inboard systems and has now been well accepted in boating circles.