Irwin 43 Cc Mkii Known Issues

Common problems, survey red flags, and what to inspect before buying a Irwin 43 Cc Mkii.

These are the most commonly reported problems on the Irwin 43 Cc Mkii, compiled from surveys, owner reports, and marine forums. Use this list as a pre-purchase inspection checklist — especially the high-severity items.

Known Issues

5 High 4 Medium 1 Low

Accommodations

Medium

The aft owner's cabin under the center cockpit is notorious for water intrusion through the cockpit floor drains and seat locker seals. Teak cockpit sole plugs and drain fittings deteriorate and allow seepage directly into the aft cabin headliner and cabinetry.

Low

Irwin used a significant amount of teak interior joinery that is glued and screwed to the liner rather than structurally fastened. Separation of joinery from the liner is common and can obscure evidence of hull liner voids or water intrusion behind panels.

Electrical

High

Original wiring on Irwin 43s from the mid-to-late 1980s was often undersized and routed through inaccessible liner cavities. Complete rewiring is commonly required, and original wiring should be treated as a fire risk until inspected by a marine electrician.

Engine

Medium

The engine room access on the center cockpit 43 is tight, and the original engine beds are glassed into the liner rather than the hull. Bed delamination and soft engine mounts are a known issue; check for movement or cracking around the engine bed tabbing.

Hull/Deck

High

Irwin's deck-to-hull joint on the 43 CC MkII uses an outward-turning flange that is through-bolted and bedded, but the bedding compound frequently fails, allowing water intrusion into the hull liner and causing hidden delamination along the joint. Pay close attention to the toerail fasteners and the joint itself during survey.

High

The balsa-cored deck used throughout Irwin production of this era is prone to moisture intrusion, particularly around chainplate through-bolts, stanchion bases, and deck hardware. Wet core areas are widespread on older examples and may require extensive deck replacement.

Medium

The hull liner system used by Irwin is bonded in sections and tends to separate from the hull over time, creating voids that are difficult to access and repair. Flexing in the liner is often audible when the boat moves and indicates adhesion failure.

Keel

High

The encapsulated or bolted fin keel on these boats is known to develop weeping around the keel-to-hull joint, and the keel bolt area should be carefully inspected for rust staining, soft laminate, or movement. Keel bolt access is limited from inside the bilge.

Rigging

High

The chainplate knees on Irwin 43 CC models are glassed into the interior liner rather than through-bolted to structural bulkheads, and the glass tabbing can fail under load. Inspect all chainplate attachment points carefully for cracking or movement in the surrounding laminate.

Medium

The center cockpit design uses an internal forestay or running backstay arrangement that often shows wear or improper tensioning by subsequent owners. Verify the integrity of the mast step, as compression loads on the keel-stepped mast can crack the step casting.

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