Design and Hull Form
The relationship between the 34 and the 35 is closer than the model names suggest. A swim platform was later molded into the transom, adding just under a foot to the overall length and producing what O'Day marketed as the 35. Both versions share identical waterline length, beam, and displacement, so the sailing characteristics are effectively the same hull. Buyers had a choice of deep-draft and shoal-draft keels drawing 5 feet 7 inches and 4 feet 3 inches respectively — a genuine concession to the shoal-water cruising grounds of the Chesapeake and Gulf Coast where many of these boats were sold.
Hull construction is solid fiberglass laminate, an approach that tends to age predictably and yields a structure that surveyors generally pass without drama. Decks follow the industry standard of the period — balsa-cored for stiffness and light weight — but that core demands vigilant maintenance of every deck fitting. Surveys on the 34 have turned up deck delamination along the cabin top where poorly bedded hardware allowed water to saturate the balsa over the years; it is the single construction detail most worth scrutinizing before purchase.
Rig and Sailing Performance
The 34/35's sailing numbers place it squarely in the cruiser camp rather than the racer-cruiser camp, and Hunt's office made no attempt to disguise that. A displacement-to-length ratio of 216 and a sail-area-to-displacement ratio of 16.45 compare modestly against a contemporary racer-cruiser like the J/35, which carried ratios of 165 and 21.8 respectively. The honest conclusion is that the O'Day is a decent performer capable of winning club events when well-sailed and well-equipped, not a boat that will embarrass its owners but also not one that will challenge for fleet honors against purpose-built racers. Short overhangs give the hull a reasonably long sailing waterline, and the moderate-aspect fin keel provides solid windward work without the twitchy feel of a high-aspect blade.
Engine and Mechanical Access
Universal Marine's three-cylinder, 21-horsepower fresh-water-cooled diesel is the stock auxiliary, and it is sufficient power for the size and weight of the boat. More noteworthy than the specification is the installation: the engine sits beneath the bridge deck in an arrangement that is notably uncrowded and accessible from all sides. A large port-side seat locker gives even a large person straightforward entry to the fuel tank and water heater positioned aft. Good access is rarely celebrated in boat reviews until you've owned a boat where it is absent; on the O'Day 35, mechanics and surveyors have consistently found the setup refreshingly workable.
Accommodations
The interior plan is what Hunt's office would have called proven and what a marketing brochure might call classic. Forward V-berth cabin, head to port with hanging lockers to starboard, port and starboard settees in the main saloon around a centerline drop-leaf table, followed aft by a quarter berth and navigation station to starboard and a U-shaped galley to port. Nothing in the arrangement surprises, and that is precisely the point: the layout is spacious, uncluttered, and efficient in a way that more imaginative arrangements rarely achieve in the real world of wet gear, provisioning bags, and chartbooks.
Known Issues and Inspection Points
Three specific concerns appear consistently in professional surveys. First, osmotic blistering of the bottom is reported on the solid-glass hull — not universal, but common enough to budget for a barrier coat if the boat has not already received one. Second, cast iron keels on these boats frequently show rust scaling from inadequate preparation and preservation; the metal is sound underneath, but an owner who has not properly addressed the surface will have an ugly keel and eventually a compromised one. Third, and most consequential for shoal-draft buyers: the same rudder is used on both keel configurations, meaning on the shoal-draft model the rudder tip sits at nearly the same depth as the keel bottom, leaving it vulnerable to grounding damage even in soft mud.
Refits and Upgrades
The O'Day 35 accepts standard upgrades without drama. The engine bay's generous access makes diesel replacement or repowering straightforward compared with many contemporaries where the powerplant must be nearly disassembled to remove. The interior fiberglass hull liner that forms the berths and lockers limits structural access in the bilge but has shown no history of serious failure, so owners typically find the liner more an inspection inconvenience than a structural liability. Keel remediation — grinding, priming with epoxy, and applying a barrier system — is the most common significant refit and well within the budget of a working boat owner willing to spend a weekend on the hard.
The Verdict
The O'Day 35 is an honest cruising sailboat from a company that understood its customer: the weekend sailor who wants comfortable berths, a manageable rig, and an engine bay they can actually work in. It does not compete with the performance-oriented boats of its era, and it was never designed to. What it offers is contemporary styling, spacious accommodations and good sailing performance in a package that has aged gracefully precisely because it made no extreme choices.
Pros
- Generous, practical interior with no wasted space
- Excellent engine access for maintenance and servicing
- Solid-glass hull construction ages predictably
- Shoal-draft option opens up cruising grounds unavailable to deeper boats
- Moderate fin keel delivers reliable windward performance
Cons
- Balsa deck core vulnerable to moisture intrusion at deck fittings
- Cast iron keel requires diligent surface preparation to prevent rust scaling
- Shoal-draft rudder exposed at keel depth, vulnerable to grounding damage
- Sailing performance sits well behind contemporary racer-cruisers of the same era
- Hull liner limits access for thorough bilge and structural inspection
