The leading engine builders have announced a boatload of new engines and technologies at the Miami International Boat Show.

Honda Marine showed new BF200, BF225 and BF250 motors with a radical new design for the Japanese manufacturer, along with ease of maintenance and multiple rigging options. The outboards have a new Progressive V Form design.

The BF200 and BF225 both have new engines, while the BF250 is powered by a new 3.6-litre V6 engine. Honda has added corrosion resistance and built in safeguards to decrease maintenance time. The new engines will be available through Honda Marine dealers starting in the fourth quarter of 2018.

Mercury Marine also introduced a new series of V6 four-stroke outboards at the show. The new line includes 175hp, 200hp and 225hp models. It will join its existing 75hp-150hp four-stroke line. The outboards are built on Mercury's new 3.4-litre V6 platform, designed to be powerful, light, compact and fuel-efficient.

"This new platform will position Mercury to advance product leadership in the 175hp-225hp outboard category," said John Pfeifer, Mercury Marine president, in a statement. "These outboards set a new benchmark in the marine industry. They are the quietest, lightest, smoothest, quickest and most fuel-efficient engines we have produced in this range."

Mercury also launched a new 200hp V6 SeaPro for commercial use. Mercury says it has the lightest weight and highest displacement in its class.

Mercury also introduced a new 150 Pro XS outboard at the Miami show. The outboard is designed for the high-output category for fishing enthusiasts and performance-oriented bay and pontoon boats.

Yanmar launched the world’s smallest common-rail inboard diesel at the show. The compact Yanmar three-cylinder 3JH40 inboard has an output of 40 mhp. The engine will allow owners of smaller boats to benefit from the most recent electronically-managed CR fuel-injection technology. The 3JH40 engine surpasses EPA Tier 3 and EU RCD Tier 2 emission regulations for virtually smoke and odor-free operation. Yanmar called it the “ideal solution” for monohull and catamaran sailing vessels up to 45ft as well as small motorboats.

Yanmar also introduced two new models in its 4LV series. Last year, the 150hp, 170hp and 195hp were introduced. This year the engine builder launched the 230hp and 250hp versions to complete the line. The 3800 rpm 230 and 250 mhp models feature an increase in output and different turbo models from the first three 3500 rpm units in Yanmar’s mid-section range of leading diesels.

Yanmar also announced a new JC20 joystick that allows manoeuvering for twin straight-shaft drive installations when using a bow thruster.

Yanmar said it has strengthened its position in the industry through its acquisition of Flexofold, a Danish-based company that develops low-drag folding propellers. It also officially launched the Dtorque 111 50hp diesel outboard engine following an agreement with Neander Shark for global distribution. The company also partners with Vetus manufacturers.

“We are combining Yanmar’s own proven expertise with exclusive technology from our new strategic acquisitions and partnerships to offer complete solutions to a wide variety of marine customers,” said Floris Lettinga, Yanmar’s global sales manager, in a statement. “We have incorporated our innovative technology into our latest engines to complete our electronic engine line-up from 40 to 440 mhp, all complemented by our universal control system.” Lettinga said that Yanmar is expecting to grow its business with new partners and investments in 2018 and beyond.

Yamaha also included a new V MAX SHO 90 for inshore fishing boats. It is the smallest of the SHO range and among the strongest of all 90hp outboards on the market, according to Yamaha. It will be available in the first quarter of 2018.

Yamaha also launched an F200 20-inch shaft model with counter-rotation for the inshore boating market. Its 6X3 control is also new and designed to fit most single-applications for either left or right mounting on the gunwale or console. The company has also made its F300 and F350 outboards available in white. “The new products we will introduce in the first quarter of 2018 are all about giving customers exactly what they want to create a personalised, exceptional boating experience,” said Ben Speciale, Yamaha Marine Group president, in a statement.