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About Us

Founded in 1977 in Northern Wisconsin, Superior Diesel has grown to become one of the largest and most capable providers of engine power solutions for off-highway equipment in North America.

Our formula for success is simple

  • Product expertise in a broad range of customer applications
  • Engine products that are world class quality
  • Outstanding front end technical services
  • Comprehensive product solutions and packaged power units
  • Engine / machinery integration
  • Performance certified trim components
  • Flexible lead times and inventory
  • Outstanding after sale field service and support

Superior Diesel is currently operating in a 19 state region throughout the Midwest, Northeast, and Atlantic coast regions of the United States. Our products and services are provided from our industry leading facilities in Rhinelander, Wisconsin; Seville, Ohio; and through our wholly owned subsidiary, Bell Power Systems in Essex, Connecticut.   

Want information about our facility and surrounding areas? Click here.



Superior Diesel originates as a division of Ison Equipment in Monico, Wisconsin. Ison is the John Deere Construction and Forestry dealer and became the engine distributor for Wisconsin, Michigan, Northern Illinois, and Northwest Indiana.


Superior Diesel, Inc. changes ownership to become a stand-alone entity independent from Ison Equipment and relocates operations to North Stevens Street in Rhinelander, Wisconsin.

Product Addition

Superior Diesel adds John Deere’s Funk branded pump drives to its product offering.


Superior Diesel completes construction and relocates to a new, larger 49,000 SQFT facility on Fox Ranch Road, in Rhinelander, Wisconsin.

Strategic Acquisition

Superior Diesel acquires Heartland Engine Company of Medina OH, adding a full service facility and additional John Deere Power Systems distribution territory to include Ohio, Eastern Indiana, Kentucky, Western New York, Western Pennsylvania, and West Virginia.

Product Addition

Superior Diesel adds the full Funk Drivetrain line to its product offering including axles, transmissions, and planetary gear drives.


Superior Diesel relocates its Ohio operations to a new, larger 40,000 SQFT facility on Greenwich Road in Seville, Ohio

Strategic Acquisition

Superior Diesel acquires Bell Power Systems of Essex CT, adding a 50,000 SQFT full service facility and additional John Deere Power Systems and Yanmar distribution territory to include Eastern New York, Eastern Pennsylvania, Maine, Vermont, New Hampshire, Massachusetts, Connecticut, Rhode Island, New Jersey, Maryland, Delaware, and Virginia.

Product Addition

Superior Diesel adds the Kohler Diesel engine line to its product offering with a 19 state distribution territory in the Midwestern and Eastern United States.


Superior Diesel completes a 12,000 SQFT expansion to its Essex, Connecticut (Bell Power Systems) facility. The expansion provides additional space for production, material storage, engineering services, and product testing.

Product Addition

Superior Diesel adds the Zenith Power Products line of spark-ignited engines to its product offering.


Superior Diesel completes a 50,000 SQFT expansion to its Rhinelander, WI facility, doubling the size. The expansion provides additional space for production, material storage, and product testing.

Our Team

Dave Niles

VP Sales & Marketing

Contact Dave

Toll: 888-803-9175

Austin Hoffmann

OEM Engine Market Manager

Contact Austin

Toll: 888-803-9175

Trevor Orr

Kohler Product Manager

Contact Trevor

Cell: 715-360-7780

Zach Reeves

John Deere 350 Series Product Manager

Contact Zach

Desk: 715-365-0587

Scott McKitrick

Order Fulfillment Coordinator

Contact Scott

Toll: 888-803-9175

(Option 2, Option 2)

Jason Lowe

Order Fulfillment Coordinator

Contact Jason

Toll: 888-803-9175

(Option 2, Option 2)

Steve Haapala

Regional Sales Manager North (WI, MI, WEST IL)

Contact Steve Haapala

Cell: 715-490-0152

Brett Bennett

Regional Sales Manager South (EAST IL, IN, OH, KY, WV, WEST PA, WEST NY)

Contact Brett

Cell: 330-289-0800

Chris Ulrich

Area Manager

Contact Chris

Cell: 330-701-4025

Shawn Shea

Area Manager

Contact Shawn

Cell: 330-241-7193

Mark Domasky

Area Manager

Contact Mark

Cell: 715-492-0196

Mike Budzis

Area Manager

Contact Mike

Cell: 715-663-0637

Don Street

Funk Drivetrain Product Manager & Dealer Development

Contact Don

Desk: 330-975-4426

Bill Lee

Marine Engine Sales Manager

Contact Bill

Cell: 860-227-7402

Mike Van Donsel

Marine Product Manager

Contact Mike

Cell: 715-360-3073

Replacement Engine Team

Contact Replacement Engine Team

Desk: 888-803-9175

(Option 2, Option 4)

Product Support Team

Contact Product Support Team

Desk: 715-365-0549

Sheryl Seefeldt

HR Director

Contact Sheryl

Desk: 715-365-0533

Marine Engine Sales Team

New and Replacement Engines

Contact Marine Engine Sales Team

Phone: 1-800-225-8669

(Option 3, Option 2)

Our professional staff is ready to assist you with your drivetrain and diesel engine requirements in whatever market you serve. Our skilled engineers can custom design products to fit your specific application needs and our production team is experienced and well versed in application and assembly.