orlov747
25.04.2021 3:42:07
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One of the bigger features Mercury developed for the 2018 boating season is actually designed specifically for a few of their smaller outboards. The new 15hp and 20hp EFI Four Strokes to be exact. These outboards have not only been upgraded to an Electronic Fuel Injection system, but they are also getting a fresh new look with some pretty cool features. If you haven't seen these in person, you should probably check them out. Especially if you are considering a new 15 or 20hp outboard this season and I will tell you why.
For 2018, Mercury introduced a handful of different horsepower sizes to join their Electronic Fuel Injection family. Added to the lineup is the 20hp, 15hp, and 9.9hp portable outboards. Until this year, Suzuki was the only major manufacturer making EFI motors as low as 9.9hp. Now Mercury and Tohatsu have changed that and I'm sure the others won't be too far behind in the EFI game. These new Mercurys feature a battery-less EFI that offers reliable starting, quick throttle response, and outstanding performance. They are also said to be the lightest on the market which in turn lends to better acceleration, top speed, handling, and fuel consumption. Not to mention that these are one of the most user-friendly outboards when it comes to maintenance with their no-drip, no-spill oil drain system, water separating fuel filter, and maintenance guide under the cowl.
Mercury also found out through their research that their customers want to be able to adjust the tiller handles vertically due to the variety of different boat layouts and body types. Depending on your size, normal tillers can be a pain to reach or control at times. So what Mercury decided to do was design an adjustable down stop so that boaters can easily change the vertical angle of the tiller between -5 and +10 degrees. This allows for a more comfortable ride for the operator no matter how big or small they are. more
Mercury Marine project manager Mike Reilley (red jacket) with the author and a validation prototype version of the Big Tiller before a test-drive in Wisconsin. This tiller was rigged to an Optimax 115 wearing a Mariner cowl that just happened to be handy at the test center shop. The Mariner brand is not coming back to the United States market.
While the Mercury Big Tiller utilizes many of the basic ideas from EngineSteer, it has been engineered to use many existing power steering components from the Mercury Verado outboards, including the compact Verado hydraulic pump and hoses. The pump is located under the aft splashwell deck, and should be rigged to a deep-cycle battery separate from the starting battery. The pump feeds a hydraulic valve manifold that is built right into the die-cast aluminum tiller handle. Four hydraulic lines connect the manifold to a steering ram mounted on the engine bracket. Mercury says the steering ram was subjected to extraordinary durability tests - 300,000 steering cycles at a load of 575 pounds. here
There's a lot more to the Big Tiller than power steering. It's been about 25 years since Mercury redesigned it's tiller handle for larger motors, and it took this opportunity to incorporate a number of updates that frankly help it keep pace with the tillers offered by Yamaha and Suzuki. A spring-loaded pin at the base of the tiller can be used to lock it in place in one of three positions' fully up for storage or in two angled positions for operation while the driver is standing. The trim switch is located on the end of the throttle grip, right under the operator's thumb. A Troll Control toggle on the tiller arm allows the operator to fine-tune trolling speed in 10-rpm increments from idle to 1000 rpm. The shift handle has been moved close to the forward end of the tiller, has a new ergonomic grip, and operates through premium cables rather a rigid linkage.
An aftermarket power-assist tiller system has been on the market since 2004, when Merten Marine Ltd. Of Oshkosh, Wisconsin, received a patent for its EngineSteer product, which it also began selling that year. In development since 2000, EngineSteer utilized a stock Mercury, Suzuki and Yamaha tiller handle with parts that made it compatible with a hydraulic power steering system. The EngineSteer patent was so broad, according to Reilley of Mercury, that the most practical way for Mercury to proceed with a power-tiller project was to get the rights to the EngineSteer patent. In July, Mercury announced that it had reach a licensing agreement for exclusive rights to the patent that Reilley believes will make it impossible for anyone else to offer a power tiller. here
The Big Tiller will also be offered in a DTS (Digital Throttle and Shift) version for Mercury motors with that feature, which replaces the shift and throttle cables with drive-by-wire. Finally, the full rotation of the throttle grip has been reduced from 180 degrees to 105 degrees, so most operators will be able to twist to full throttle in one movement, but still have good control at low speeds. An optional amber courtesy light located on the bottom of the tiller illuminates the area around the motor.
The valves in the manifold are actuated through the throttle grip on the end of the tiller handle, which is designed to pivot about 6.5 degrees to port or starboard which the boat operator pushes or pulls on the handle to steer the motor. When you run the motor, this movement in the grip is so slight it's almost unnoticed. Hand pressure on the tiller opens the hydraulic valving and applies the power assist to the motor and eliminates all steering feedback to the tiller. When there is no hand pressure on the tiller, the hydraulics hold the motor in place, so the operator can set a course and then relax his "steering muscles." A by-pass system allows the motor to be steered manually if the power steering system should fail.
Upon start-up, release the start button. here
Shift control and proper gear engagement more
Route and secure all wires to avoid contact with moving parts. more
Apply soapy water to the inside surfaces of grommet and install cables and fuel line as shown:
Improper installation of this kit could result in personal injury due to loss of boat control.