Yamaha’s Big­gest Out­board Ever!

Soundings - - Dispatches -

Yamaha Marine in May launched its XTO Off­shore plat­form by in­tro­duc­ing the XF425, a 425-horse­power, four-stroke out­board that is the com­pany’s high­est-horse­power of­fer­ing to date.

“This is an in­te­grated out­board sys­tem, de­signed to push the heav­i­est off­shore boats and yachts,” said Ben Spe­ciale, Yamaha Marine Group Pres­i­dent. “The new Yamaha V8 XTO Off­shore has 5.6- liters, tremen­dous thrust and 425 horse­power. The V8 XTO Off­shore pro­vides ex­treme per­for­mance for the big­gest boats.”

The XF425 fea­tures a num­ber of in­dus­try firsts and in­no­va­tions, in­clud­ing the high­est- ever com­pres­sion ra­tio ( 12.2: 1) in a four- stroke out­board, the first di­rect-in­jec­tion sys­tem in a four- stroke out­board, a first- of- its kind in­te­grated elec­tronic steer­ing sys- tem, Irid­ium spark plugs and plasma-fused, sleeve­less cylinder lin­ers. Also new is a clever ex­haust sys­tem that di­rects ex­haust gasses away from the pro­pel­ler, re­sult­ing in a 300 per­cent in­crease in thrust over the com­pany’s pre­vi­ous horse­power king, the F350.

Other no­table fea­tures and im­prove­ments in­clude a four-ther­mo­stat cool­ing sys­tem (two per cylinder bank) that en­sures even cool­ing of in­ter­nal com­po­nents, a quick­con­nect hose bib that al­lows the lower unit gear lube to be changed while the boat is still in the water and an ad­di­tional 3.25 inches of clear­ance when tilted fully up when com­pared to the F350.

The XF425 will be avail­able in Au­gust in gray, pearles­cent white or un­painted, for own­ers who want to cus­tom­ize. Avail­able shaft lengths in­clude 25-, 30- and 35-inch mod­els. The XF450 starts at $44,000. yama­haout­boards.com

— Gary Re­ich

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