Single vs. Twin Outboards

Contender Boats is known for tournament sport-fishing boats, but the company describes its 24S center-console as “a great day-tripping boat” that fishes well but also serves families and divers. After several sea trials on the upper and lower Chesapeake Bay, we certainly agree. On those tests, we explored a common question: Should you power your boat with single or twin outboards? Read on to see what we found.

We tested two Contender 24S boats—one with a single Yamaha F300, the other with twin Yamaha F150s.  Both offered top speeds in the low 50s and efficient cruising speeds of 30 to 40 mph (3,500 to 4,500 rpm), yet the twins’ performance stood in stark contrast to the single. As expected, the weight of the twins planted the 24S’s 22.5-degree transom deadrise deep-V hull firmly in the water at all speeds and accelerated that boat to 30 mph, which was  slightly faster than the single, presumably because of the greater surface area of two propellers versus one. Their lift also caused them to run slightly flatter at high speeds. Despite the weight of the two engines, this Contender’s well-designed cockpit still self-bailed ­effectively with twins as the scuppers remained above the waterline. Nonetheless, we think the single was the hands-down winner for several reasons.

The weight difference between the two boats is around 500 pounds. This shows up clearly in the performance charts shown on the opposite page. First, the single-engine boat is ­faster at every rpm stage. The ­single rose onto plane at a lower rpm range (2,500 to 3,000 rpm), despite the lift from the twin ­propellers. ­Second, the single was significantly more fuel-­efficient, ­topping out at a remarkable 3.9 mpg versus 2.7 mpg for the twins at 3,500 rpm. Twin engines require twice as much rigging and maintenance as a single, and they take up more room on the ­transom’s dive platform. ­Finally, the twin-150 rig costs $23,499 more than the single 300 (retail base price $157,210 versus $133,711). Note also that the twin-engine boat would not plane with a single 150, even with the crew all the way up at the bow to help balance it. (The boat will likely do so with one of the optional twin 200s.) Rather than buying twins for get-home redundancy, an annual ­towing-service ­membership might serve many boaters. To me, Contender’s 24S is a great boat for a big estuary like the Chesapeake or for near-coastal work, say up to 25 miles offshore.

While the 24S shows its pure Contender fishing genes, it also offers a head in the console (5 feet, 7 inches of headroom) and seating ranging from U-shaped forward seats to transom jump seats. It’s family-friendly enough to take some kids ­bottomfishing, serve ­Saturday ­race-committee work for a yacht club, or join friends at a sandbar. The 300 hp outboard is plenty powerful for casual tow sports. There’s a lot of storage space, much of it dry, plus coolers. A couple could cruise the 24S along the coast and its rivers with a little attention to Airbnbs and waterside restaurants. It’s built like a tank—solid enough to be heirloom quality for multiple generations of a ­water-loving family.

Read Next: Sterndrive vs. Outboard

One criticism: Its fuel tank, at 130 gallons, seems large for the single-engine version; range at 3,500 rpm works out to 456 miles. While few boaters complain about too much fuel capacity, I’d guess that most people choosing the 24S wouldn’t run more than 100 miles per day, so an 85- to 90-gallon capacity seems more appropriate (range about 230 miles) to avoid wasted space or carrying an extra 330 pounds of dead weight (55 gallons of fuel). For twins, or a single 350 or 400, one might want the extra 55 gallons. That’s my opinion, as someone who would run 40 miles one way in it on occasion. Yours can differ, certainly.

So, as the only “Sport” model in Contender’s line, the 24S seems underrated, deserving of more attention for coastal folks who aren’t interested in hardcore blue water. Yes, as a semicustom builder, Contender can build sport ­features such as forward seating into larger models, but this boat seems to fit neatly into a widespread coastal niche where it fishes ably but also shows off its well-honed versatility.

How We Tested

• Single Engine: Single 300 hp Yamaha V-6 outboard
• Drive/Prop: Outboard/15.5″x 17″ Saltwater Series II 3-blade stainless steel
• Gear Ratio: 1.75:1 Fuel Load: 75 gal. Crew Weight: 380 lb.

How We Tested

• Twin Engines: Twin 150 hp Yamaha I-4 outboards
• Drive/Props: Outboard/13.75″x 19″ Reliance 3-blade stainless steel
• Gear Ratio: 2:1 Fuel Load: 40 gal. Crew Weight: 380 lb.

Contender 24S Specs