The TACO Grand Slam 390XL (MPN GS-390XL, UPC 631012090088) is a SET OF TWO outrigger mounts – the heavy-duty XL variant of TACO’s popular GS-380 base – sized for serious center consoles, sportfishers, and offshore boats 25-50 feet that fish multi-rig outrigger setups with longer (and heavier) outrigger poles. The XL designation means stronger gusset support and a thicker arm than the standard GS-380, built to withstand the torque and pressure created when running longer outrigger poles in rough seas. Hardtop / T-top mount design accommodates tops up to 4-1/2 inches thick – significantly thicker than typical 4-inch mounts, with an elongated base for proper load distribution across thicker T-top materials. Holds 1-1/2 inch diameter outrigger poles – the standard size for TACO Deluxe Aluminum and Carbon Fiber Tele-Outriggers. Elevation crank handle accessible from UNDER the T-top lets you raise and lower the outrigger poles without climbing on top of the T-top – safer and faster deployment, especially in rough seas where standing on the T-top is dangerous. Horizontal rotation also controlled from under the T-top via the offset handle (offset for better hand clearance vs an in-line handle). Strong locking head positions the outriggers exactly where you want them with a secure pin-locking mechanism that prevents accidental release under wave loading. Cast 316L marine-grade stainless steel construction with machined aluminum components – the standard materials for serious offshore marine hardware. Silver finish matches typical T-top hardware aesthetics. Pairs natively with TACO Deluxe Aluminum and Carbon Fiber Tele-Outriggers (sold separately). 3-year limited TACO Marine warranty. Made and supported by TACO Marine – one of the established names in serious outrigger and rod-handling marine hardware.
The TACO Grand Slam 390XL is the heavy-duty XL variant of TACO’s popular GS-380 outrigger mount platform – a SET OF TWO mounts (one for each side of the T-top) sized for the bigger, faster center consoles and sportfishers between 25 and 50 feet that fish multi-rig outrigger setups with longer outrigger poles. For serious offshore anglers running carbon fiber or extended-length aluminum tele-outriggers, the GS-390XL is the right mount when the standard GS-380 isn’t beefy enough for the loads.
What ‘XL’ means – the upgrade over GS-380. The base GS-380 is TACO’s popular outrigger mount sized for typical center console outrigger setups. The 390XL adds: (1) Stronger gusset support – thicker reinforcement at the critical stress point where the arm meets the base, handling the additional torque from longer / heavier outrigger poles. (2) Thicker arm – more material in the load-bearing arm to handle bending forces from extended outriggers under wind / wave loading. (3) Elongated base – longer base footprint that distributes mounting load across a wider area of the T-top, accommodating tops up to 4-1/2 inches thick (vs typical 4 inch on standard mounts). The XL upgrades matter when running 20+ foot outrigger poles in offshore conditions where the moment arm and dynamic loading exceed what the standard mount handles.
What boat sizes – and outrigger sizes – this is for. The GS-390XL is sized for boats 25-50 feet with hardtops, running outrigger poles up to typical TACO Deluxe Aluminum (18-21 ft) or Carbon Fiber Tele-Outrigger (20-24 ft) lengths. For smaller boats with shorter outrigger poles (under 16 ft), the standard GS-380 is adequate and a better value. For boats over 50 feet with serious commercial-grade outrigger setups (40+ ft outriggers), step up to TACO’s Grand Slam 450 series or commercial-grade outrigger mounts. For most serious recreational offshore center consoles in the 28-40 ft range, the GS-390XL is the right call.
Hardtop / T-top mount – the install design. The mount is designed to bolt through a fiberglass T-top, aluminum hardtop, or similar overhead structure on a center console or sportfisher. The base sits on top of the hardtop with the integrated mounting plate, and through-bolts extend down through the hardtop with backing plates on the underside for load distribution. Accommodates hardtops up to 4-1/2 inches thick (interior surface to exterior surface) – which covers the typical thicker fiberglass hardtops on premium boats vs the standard 4 inch on most boats. For thinner hardtops, the mount still works (just uses shorter through-bolts). For installations on thinner roof structures or alternative mounting locations, contact TACO Marine for the right mount variant.
Under-T-top elevation control – the key feature. The elevation crank handle that raises and lowers the outrigger poles is accessible from UNDERNEATH the T-top, not from on top. Critical advantage: deploy and stow the outrigger poles from the deck without climbing on top of the T-top – safer and faster operation, especially in rough seas where standing on the T-top is dangerous. The crank handle is at deck operator height, easily reached from the cockpit or the front deck near the helm. Combined with horizontal rotation control also from under the T-top, you can fully manage your outrigger deployment without leaving the safety of the deck.
Offset handle design – hand clearance matters. The crank handle is offset from the central axis of the mount – creates clearance for your hand to grip and turn the handle without contact with the T-top, mount base, or adjacent hardware. Small detail but meaningful when you’re trying to rapidly crank an outrigger up or down in actively fishing conditions. Cheaper outrigger mounts use in-line handles that pinch your hand against the T-top during the rotation – the offset design eliminates this problem.
Strong locking head with pin-locking technology. The mount head where the outrigger pole inserts uses a strong locking design with secure pin-locking technology – holds the outrigger pole exactly where you set it without slipping or releasing under wave loading. Critical for offshore fishing in rough conditions where forces on the outrigger poles can be substantial. The pin-lock mechanism is reliable (no sloppy bolt-and-nut clamping that loosens over time) and easy to operate (quick lock and release for changing outrigger positions during fishing).
316L stainless steel construction. The mount body is cast Type 316L marine-grade stainless steel – the standard material for serious offshore marine hardware. 316L provides: superior corrosion resistance vs lower-grade stainless (handles continuous saltwater exposure for decades), high tensile strength for handling the dynamic loads from offshore outrigger use, and good fatigue resistance for the cyclic loading from wave motion. The machined aluminum components are anodized for additional corrosion protection. Combined, the materials deliver the multi-decade service life expected of serious offshore boat hardware.
Pairs with TACO outriggers. The GS-390XL pairs natively with TACO’s Deluxe Aluminum Tele-Outriggers and Carbon Fiber Tele-Outriggers (both sold separately) – the same manufacturer designed the mount and the outriggers as a matched system. For owners building a complete TACO outrigger setup, the matched mount + outrigger combination delivers known compatibility and refined fit. For mounting other-brand outrigger poles in the 1-1/2 inch diameter range, the GS-390XL accepts standard 1-1/2 inch outrigger poles from most manufacturers – verify pole compatibility before purchase if mixing brands.
Install considerations. Plan for 4-8 hours per mount for an experienced installer (8-16 hours total for the pair). Tasks per side: (1) Mark the mounting location on the T-top – typically 30-45 degrees forward of the helm location for proper outrigger deployment geometry. (2) Drill the through-bolt holes for the mounting plate – precision drilling matters for proper through-hardware alignment. (3) Apply marine sealant (3M 5200 or equivalent) around the bolt holes to prevent water intrusion into the T-top core. (4) Bolt the mount in place using stainless through-bolts with backing plates on the underside for load distribution. (5) Install the outrigger poles into the mount head and lock with the pin-locking mechanism. (6) Test deployment and rotation function. For installations on existing T-tops with limited under-side access, plan for the longer end of the time estimate. The TACO installation manual provides detailed mounting procedures.
3-year warranty. TACO provides a 3-year limited warranty on the mount for manufacturing defects in materials and workmanship – the standard warranty term for premium outrigger mount hardware. TACO Marine’s warranty service is U.S.-based with a responsive customer service team and parts availability for service items. Save the receipt and original packaging for warranty service.
