Irwin 10/4: Ted Irwin's Capable 25-Foot Coastal Cruiser

Introduction & Design Heritage

The Irwin 10/4 emerged during a golden era of fiberglass sailboat production. Designed by Ted Irwin at his St. Petersburg yard, the 10/4 reflected his philosophy of building affordable yet seaworthy craft. Production ran from 1975 to 1982. The model quickly earned a following for its generous beam and forgiving sailing qualities.

Construction, Technical Specifications & Design Analysis

The Irwin 10/4 features a solid fiberglass hull with moderate displacement. Length overall measures 25 feet while beam reaches a full 10 feet. Draft is approximately 3.75 feet. The masthead sloop rig carries 300 square feet of sail. Owners note solid construction but recommend checking deck cores on older examples.

Sailing Performance & Handling Characteristics

The 10/4 handles well in coastal conditions with its wide beam providing excellent initial stability. It tracks steadily and responds predictably to helm. Heavy weather capability is limited by size, yet many owners report comfortable passages in 15-20 knot winds. Balance is good and the boat forgives minor trim errors.

Interior Layout & Comfort Features

Below decks the 10/4 offers surprising space thanks to its 10-foot beam. V-berth forward leads to a compact saloon with settees convertible to berths. Headroom is modest at 5 feet 8 inches. The enclosed head and small galley suit weekend cruising while four berths accommodate a couple and guests.

Engine, Propulsion & Technical Systems

Most Irwin 10/4s came equipped with small inboard diesels or outboards. Yanmar or Atomic 4 engines were common. Fuel capacity supports short coastal runs. Owners frequently upgrade electrical systems and replace aging tanks. Reliable auxiliary power remains essential for marina maneuvering.

Ownership Insights: Market Value, Maintenance & Real-World Experience

Current market values range from $3,000 to $8,000 depending on condition. Buyers should budget for rig inspection, possible engine rebuild, and gelcoat repairs. Known issues include deck delamination and through-hull corrosion on 1970s boats. Regular maintenance keeps these capable little cruisers performing well. Owners can connect through Boat Clubs (boat-clubs.net), a worldwide network of dedicated owner communities covering 40+ sailboat manufacturers.