Bennington 21 SLX Pontoons For Sale

The Bennington 21 SLX is a 21-foot tri-toon pontoon built for family boating, with seating that runs from roughly eight to ten people in standard form up to 12 aboard the SLX Premium. The 21 SLX rides on a full-length Triton hull, and the SPS Performance Package adds triple 25-inch round tubes with lifting strakes, performance foils on the outer tubes, an under-deck wave shield, and SeaStar hydraulic steering. That combination is what lets the boat carry a larger crew while still planing cleanly and towing kids on an inner tube.

Performance on a 21-foot Bennington pontoon depends heavily on the outboard. Rigged with a Yamaha 150 four-stroke, top-end speed is about 38 mph. With the new Yamaha VF150 V-MAX SHO — a 2.8-liter inline-four that weighs 489 pounds and uses a 25-inch shaft suited to pontoons — the 21 SLX cruised at 25.1 mph at 4,000 rpm at a respectable 84 dBA at the helm. That engine moved the boat from 0 to 20 mph in 5.5 seconds, 0 to 30 in 7.6 seconds, and pulled from 20 to 30 mph in 4.5 seconds. Rigged with the smaller Yamaha F90 and a 14x12 three-blade stainless prop, the same hull reached a top speed of 27.7 mph at 5,900 rpm, hit plane in 3.2 seconds, and ran its most economical cruise at 17.2 mph at 4,000 rpm while burning 4.1 gallons per hour.

The helm centers on an upgraded captain's chair — the optional G Series reclining seat has twin flip-up armrests and is fully adjustable. The dash carries a custom Sterling gauge cluster set against a matte maple finish, with a Garmin Striker for depth, speed, and water temperature, plus a Kicker head unit offering Bluetooth and USB to a four-speaker sound system. Docking lights and navigation lights are mounted forward.

The deck layout is built around socializing. Two radius loungers sit forward with a wraparound portside lounge and table, the forward sun pad lifts to reveal a large storage area, and there is subfloor center-locker (ski-locker) storage plus storage under all the seats. A pop-up changing room deploys in about five seconds. At the stern, a deep-step boarding ladder makes climbing back aboard after a swim easy, and a 10-foot bimini supplies shade.

Finish and options let buyers tailor the boat. Color schemes shown include regatta blue with smoky granite accents and driftwood with diamond-patterned carbon accents, with upholstery choices spanning Java soft-touch, SXP with an 80% cutout, and Sandstone pillow-top. Flooring options include woven teak with a cushion underneath and vinyl. The blackout package adds anodized black rails, trim, bimini, and swim ladder, while a multicolored LED system offers 13 colors. A Saltwater Series build adds corrosion anodes and sealed keels on the bottoms of the tubes.

For shoppers comparing a 21 ft Bennington pontoon for sale, the main variable to weigh is engine choice against expected load. The F90 delivers economical cruising and adequate speed for a light crew, while the Yamaha 150 paired with the SPS tube package is the setup that produces the strongest holeshot, mid-range acceleration, and the roughly 38 mph top end suited to towing and larger family groups.