4/21/2024 0 Comments Yamaha f70 flash ecuThe latter feature makes the F70A compatible with Yamaha’s K-series propellers as used on Yamaha’s 80-115hp models. Typically, the new outboard boasts much of the niceties sported on other Yamaha four-strokes such as ECM micro-computer engine management, multi-point fuel injection, variable RPM adjustment for easier trolling speed adjustment, and a 2.33/1 final gear ratio. Actuation of the engine’s intake valves comes via a new and innovative single rocker arm arrangement. The engineers responsible for the new F70A appear to have followed the lead of Yamaha’s motorcycle division by incorporating high performance engine componentry in the form of lightweight pistons and valves (now four per cylinder, the F60 has two per cylinder), a stronger and lighter mounting bracket, and a lighter engine cowling.Ī single throttle valve and intake manifold with separate chambers feeds each cylinder with fuel as required. Hampson says Yamaha expects the F70A to outsell the 60 by up to 2:1.Īccording to Yamaha technical spokesman Dan Power, the company has trimmed fat in key areas of the engine’s design to keep the weight down to 120kg (119kg sans battery cables). Interestingly, the F70A is expected to take sales away from the successful F60, currently a top seller for the Japanese motor giant. The F70A is targeted at the key 4.8-5.5m boat market, and is ideal for hulls weighing less than 680kgs. The 80 is based on Yamaha’s 100hp four-stroke and is too heavy for many tinnies and small fibreglass boats. Evinrude E-TEC’s 75hp is the closest overall competitor in power terms with a ratio of 58hp per litre, although the DI two-stroke loses out in weight at 145kg.Īccording to Yamaha national sales and marketing manager Brett Hampson, the F70A completes Yamaha’s mid-range line-up by slotting in between the popular F60 and the 80hp model. In comparison, its nearest four-stroke competitor, Suzuki’s DF70, weighs 155kg and has a horsepower per litre rating of 47. Based on an inline four-cylinder 996cc block, the F70A weighs in at only120kgs and boasts a power to weight ratio of 70hp per litre. The long-awaited F70A is a stand alone model which shares no interchangeable components with similar capacity engines. Yamaha yesterday released a 70hp four-stroke outboard that is both lighter and more powerful than all competitors in its class – including DI two-strokes.
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