Sea Hunt Ultra 305 SE — Quick-Reference Specs
- Boat Model: Sea Hunt Ultra 305 SE
- Cover Type: T-Top Mooring Cover
- LOA: 30'6"
- Beam: 10'2"
- Dry Weight: 7,500 lbs
- Engine: Triple Yamaha outboards (max 900 HP total)
- Fuel Capacity: 280 gallons
- Deadrise: 21° at transom
- Hull Type: Deep-V fiberglass
Cover Features
- Fit: Custom-fitted for the Sea Hunt Ultra 305 SE T-top
- Attachment: Underside edges of factory T-top frame
- T-Top Roof: Stays fully exposed
- Coverage: 85–90% of hull sides, fully enclosing all three outboard engines
- Fabric Options: 9oz marine canvas (most popular) or Sunbrella
- Construction: Reinforced stitching at all stress points with stainless snaps
- Warranty: Multi-year warranty against UV and weather damage
Additional information
Choose Your Cover Fabric
7 oz. Polyester — Our entry-level marine cover fabric, woven from 100% polyester fiber at a 7 oz. per linear yard weight. This lighter option keeps the cover manageable for solo handling while still delivering reliable protection against sun, rain, and debris. Backed by a 3-year fabric warranty. Ships in Black.
9 oz. Polyester — Step up to our heavy-duty polyester, engineered at 9 oz. per linear yard for boats that face tougher conditions or extended outdoor storage. The denser weave adds an extra layer of defense against abrasion and weather without adding unnecessary bulk. Protected by a 5-year fabric warranty. Ships in Navy or Black.
Sunbrella® — For boaters who want the best, our Sunbrella covers use 100% solution-dyed acrylic — the same fabric trusted by marine professionals worldwide. Naturally resistant to fading, mold, and water damage, Sunbrella holds its color and integrity season after season. Covered by a 6-year fabric warranty. Ships in Black, Smoke, or Marine Blue.
Both polyester options feature solution-dyed construction, where pigment is infused into each fiber during production rather than applied to the surface afterward. This process locks color deep into the material, preventing any dye transfer to your boat’s gel coat or finish. The result is a cover that stays vibrant without bleeding or rubbing off. Our polyester is also designed to breathe — it allows moisture trapped underneath to vent out naturally, reducing the risk of mildew and keeping your boat dry. The fabric holds its form without sagging or stretching over time, stays lightweight enough for one person to handle, and stands up to prolonged UV exposure and harsh marine weather.
*The warranty periods above are provided by the fabric manufacturer and cover the material itself. For details on what’s included in the warranty for your completed cover, please see our warranty page.
7 oz. Polyester — Our entry-level marine cover fabric, woven from 100% polyester fiber at a 7 oz. per linear yard weight. This lighter option keeps the cover manageable for solo handling while still delivering reliable protection against sun, rain, and debris. Backed by a 3-year fabric warranty. Ships in Black.
9 oz. Polyester — Step up to our heavy-duty polyester, engineered at 9 oz. per linear yard for boats that face tougher conditions or extended outdoor storage. The denser weave adds an extra layer of defense against abrasion and weather without adding unnecessary bulk. Protected by a 5-year fabric warranty. Ships in Navy or Black.
Sunbrella® — For boaters who want the best, our Sunbrella covers use 100% solution-dyed acrylic — the same fabric trusted by marine professionals worldwide. Naturally resistant to fading, mold, and water damage, Sunbrella holds its color and integrity season after season. Covered by a 6-year fabric warranty. Ships in Black, Smoke, or Marine Blue.
Both polyester options feature solution-dyed construction, where pigment is infused into each fiber during production rather than applied to the surface afterward. This process locks color deep into the material, preventing any dye transfer to your boat’s gel coat or finish. The result is a cover that stays vibrant without bleeding or rubbing off. Our polyester is also designed to breathe — it allows moisture trapped underneath to vent out naturally, reducing the risk of mildew and keeping your boat dry. The fabric holds its form without sagging or stretching over time, stays lightweight enough for one person to handle, and stands up to prolonged UV exposure and harsh marine weather.
*The warranty periods above are provided by the fabric manufacturer and cover the material itself. For details on what’s included in the warranty for your completed cover, please see our warranty page.
| Weight | 42 lbs |
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Install
Please watch the video below for installation instructions!
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Frequently Asked Questions
The Ultra 305 SE measures 30 feet 6 inches LOA with a 10-foot 2-inch beam — the largest center console in the Sea Hunt lineup. It features a deep-V hull with 21-degree deadrise at the transom and weighs approximately 7,500 pounds dry. Our cover is patterned specifically for these dimensions — the 10-foot-plus beam, triple-engine transom width, T-top leg spacing, and forward console position are all accounted for. The fit drapes from the T-top frame down to enclose approximately 85–90 percent of the hull sides.
Yes. The Ultra 305 SE runs triple Yamaha outboards producing up to 900 total horsepower. Our cover extends from the bow past the transom and completely encloses all three engine cowlings, powerheads, lower unit connections, and all transom mounting hardware. The triple-engine transom is the widest configuration in the Sea Hunt catalog, and our cover panels are specifically shaped to wrap all three engines without leaving gaps between cowlings or along the outer edges — a critical detail that generic covers cannot address.
The 305 SE's 280-gallon fuel tank provides extraordinary bluewater range — potentially 300-plus miles at cruising speed. That range means this boat regularly operates in the most demanding offshore environments: exposed open-ocean marinas, multi-day tournament circuits, and extended storage between offshore expeditions. Our Sunbrella marine-grade fabric is engineered for these extreme conditions — it resists salt crystallization from constant spray exposure, blocks intensified UV reflected off open water, and prevents mold and mildew in humid coastal storage.
The cover features a separate zippered section that fits around the T-top support legs. The T-top roof remains fully exposed on top — only the underside edges of the frame serve as attachment points. The 305 SE has the largest and heaviest-duty T-top frame in the Sea Hunt lineup with the widest leg spacing, and our cover is patterned for the exact frame dimensions of this specific boat. This lets you install or remove the cover without fighting the hardtop structure, even on a boat this size.
Yes. The Ultra 305 SE typically comes equipped with multiple large-format Garmin touchscreen displays, radar, VHF radio, and a comprehensive electronics package befitting the flagship of the Ultra series. Our cover provides complete coverage over the entire helm station, shielding all screens and instruments from UV exposure that cracks displays, fades LCD panels, and degrades waterproof gasket seals. The electronics investment alone on a 305 SE justifies premium cover protection.
The Ultra 305 SE has dimensions no generic cover comes close to matching. The triple-engine transom width, 10-foot 2-inch beam, T-top leg spacing, 21-degree deadrise hull angle, console position, and gunwale height are all unique to this flagship model. A universal 30-foot cover will leave major gaps at the wide triple-engine transom, sag across the expansive beam, pool water on the aggressive deadrise hull shape, and fail in coastal winds. Our cover is cut from the factory specifications — every panel, strap position, and reinforced seam is calibrated for the 305 SE.
Yes. At 7,500 pounds dry weight with a 10-foot 2-inch beam and triple engines, the 305 SE generates enormous wind load during highway transport. Our cover is built for it — heavy-duty adjustable tie-down straps run beneath the hull and cinch tight along the gunwales, preventing wind lift at sustained highway speeds. Reinforced stitching at every stress point handles the vibration and wind pressure of towing a boat this size. The cover fits flush against the hull to minimize drag and prevent the destructive flapping that tears apart lighter covers.
A T-top mooring cover uses the boat's fixed hardtop frame as its primary structural support. For a 30-foot center console like the 305 SE, this structural support is critical — the cover spans over 10 feet of beam width and 30 feet of length, requiring significant tension management to prevent sagging and water pooling. The cover attaches to the underside edges of the hardtop frame, drapes down to protect the cockpit, console, and gunwales, and includes a zippered section for the T-top legs. The hardtop roof stays exposed above. No other cover design can reliably protect a boat this size.
We offer three tiers. The 7 oz polyester carries a 3-year warranty in black. The 9 oz polyester provides heavier abrasion resistance and UV blocking with a 5-year warranty in navy or black. Our premium Sunbrella uses 100% solution-dyed acrylic with a 6-year fabric warranty in black, smoke, or marine blue. For the flagship 305 SE — the largest investment in the Sea Hunt catalog — nearly all owners choose Sunbrella or the 9 oz polyester. The premium fabric matches the premium boat and provides the longest-lasting protection for the substantial investment underneath.
Select your model year, storage method (trailer, lift, dry stack, or dock), T-top type (hardtop, hardtop with aft support bars, or canvas top), engine make and horsepower for each of the three engines, and any aftermarket accessories like jack plates or Power Poles. The triple-engine configuration is especially critical — note the exact engine models so we can shape the wide transom section correctly. Our design team combines these details with the 305 SE's factory specifications to pattern your cover for a precise fit. Add any other modifications in the order comments.
Sea Hunt Ultra 305 SE T-Top Boat Cover – Flagship Protection for the Flagship Sea Hunt
The Sea Hunt Ultra 305 SE is the crown jewel of the entire Sea Hunt lineup — a full-size offshore center console built for extended bluewater expeditions, multi-day tournament circuits, and serious open-ocean fishing. At 30 feet 6 inches long with a 10-foot 2-inch beam, a deep-V hull with 21-degree deadrise, and a massive 280-gallon fuel tank, the 305 SE delivers the range, stability, and fishability that elite offshore anglers demand. Our custom T-top mooring cover is patterned specifically for the Ultra 305 SE’s hull dimensions, triple-engine transom, and factory T-top frame.
Why the Ultra 305 SE Demands the Best Cover Available
At approximately 7,500 pounds dry weight with triple Yamaha outboards pushing up to 900 total horsepower, the 305 SE is the largest investment in the Sea Hunt catalog. The Ultra series features premium upholstery throughout, integrated Garmin electronics suites with multiple large-format displays, refined hull geometry, and the highest level of fit and finish Sea Hunt offers. UV exposure fades premium gelcoat, cracks high-end vinyl seating, and degrades waterproof electronics seals — problems that compound rapidly in the intense offshore environments where this boat operates. Owners of similar large Sea Hunt platforms like the Sea Hunt 290 T-Top know that a generic cover cannot handle a triple-engine transom profile, the specific T-top geometry, or the 10-foot-plus beam of a boat this size.
How the Custom T-Top Cover Fits Your 305 SE
The cover attaches directly to the underside edges of the factory T-top frame, then drapes down to enclose approximately 85–90 percent of the hull sides while fully covering all three outboard engines. The T-top roof stays completely exposed above. A separate zippered section accommodates the T-top support legs so you can install or remove the cover without fighting the hardtop structure. Reinforced stitching at every stress point, stainless steel snaps, and adjustable tie-down straps along the gunwales keep everything locked down through coastal winds and seasonal storms. The 305 SE’s triple-engine transom and 10-foot 2-inch beam require the largest cover panels and most reinforced construction in our Sea Hunt catalog.
Built for the Most Demanding Marine Storage Conditions
With a 280-gallon fuel tank providing extraordinary offshore range — potentially 300-plus miles — the 305 SE spends extended time in the most punishing marine environments on the coast. Whether docked at an exposed offshore marina, stored on a commercial-grade lift, or trailered between major tournament venues, every surface needs protection from sun, salt, rain, and debris. Our 9 oz marine canvas delivers heavy-duty performance, while our Sunbrella option provides the ultimate in UV and mold resistance with a 6-year fabric warranty. The same quality construction protects other large Sea Hunt platforms like the Sea Hunt 275 Ultra T-Top. Available in navy, black, and charcoal gray — purpose-built for the Ultra 305 SE and nothing else.
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