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Selecting the Yamaha Propeller That's Best for You

by Hengbo Zhang 07 Sep 2021
Are you aiming to replace or upgrade your Yamaha prop? Our "Outboard Propellers-- Engineered for Efficiency" write-up covered the fundamental engineering attributes of a propeller. Also an informal analysis will certainly allow you in conclusion that fully and angle-- also its product-- makes a distinction in the way your Yamaha prop influences your watercraft's efficiency.

This write-up dives a little bit deeper right into the Yamaha propeller option process, including taking a glimpse at prop for 50hp Yamaha outboard families as well as their regular applications. In addition to the details consisted of in this article, the Yamaha Propeller Selector is an indispensable device. Vifprop brings the complete line of Yamaha propellers, so after inputting every one of the required details, you can simply head back to as well as search for the advised Yamaha prop part number.

Yamaha Prop Selection
As you start your outboard propeller selection procedure, think of the type of boating you do, as well as the aspects of your watercraft's efficiency would certainly you such as to deal with or boost?
Selecting the Yamaha Propeller That's Best for You
Normally speaking, boaters are trying to improve one or a combination of the following aspects:

Over-revving at Wide-Open Throttle (WOT).
Failure to reach maximum RPM at WOT.
Hole-shot as well as acceleration.
Inability to get to top speed.
Fuel economic situation.
Ventilating or cavitating.

Making The Most Of Horse Power, Minimizing RPM.
The appropriate propeller for your boat and also engine combination is based partly on the wide-open throttle (WOT) operating array for your certain engine. This info is a junction of horse power and also RPM and also can be discovered in your proprietor's manual.

An optimal outboard prop will optimize your boat's efficiency while enabling your engine to operate in the suggested RPM range. The appropriate propeller will certainly prevent the engine from over-revving and also facilitate maximum horse power with minimum RPM.

An outboard engine under load should get to the maker's advised RPM at WOT, normally revealed as an RPM array. Your optimum prop will certainly deliver appropriate acceleration and full throttle while still enabling your Yamaha outboard to reach its suggested revs at WOT.

If you get this partnership wrong, early engine damages is too often the result.

Outboard Propeller Considerations.
Your propeller decision-making procedure will consist of the list below elements: pitch, diameter, light weight aluminum or steel, blade number, rake, cupping, and turning.

Prop Pitch.
Pitch is a critically vital element when selecting a new prop. Pitch is the distance the prop would certainly travel onward after one total rotation, thinking no resistance or slip.

Lower-pitch props run into much less resistance promoting much faster rotation and also making it possible for hole-shot and velocity. However, due to the fact that each prop transformation generates less forward travel, the supreme full throttle will be reduced at WOT.

Hole-shot as well as acceleration will be reduced with higher pitch props since the outboard prop experiences much more resistance. This said, additional resistance reduces the motor's RPMs and top speed at WOT.

Generally speaking, boosting prop pitch lowers RPM, while decreasing prop pitch increases RPM.

If you require more speed, a higher pitch is normally the means to go. Nevertheless, If you make use of a propeller with a too high pitch, the motor will not have adequate horsepower to transform it sufficiently, so the changes per min will certainly drop. Described as over-propping, it strains the engine and creates excessive wear. Under-propping-- suitable a propeller with as well reduced a size or pitch-- can damage your engine with over-revving. Under-propping will likewise adversely impact fuel usage.
Selecting the Yamaha Propeller That's Best for You
Prop Diameter.
Each outboard propeller has actually two numbers stamped on them-- size and also pitch. For example, a 14 x 19 propeller has a size of 14 inches and also a pitch of 19 inches. The better the diameter, the even more resistance it will certainly experience in the water.

A larger size propeller decreases the RPM and top-end speed. On the other hand, smaller sized size propellers boost RPM and top-end speed. However, smaller diameter props slip much more frequently and also are not good options if hole-shot or acceleration improvement is your objective.

Aluminum or Steel.
Aluminum propellers are the most common as well as the least pricey. Stainless steel props are more long lasting and also typically perform far better because of both thinner and also stiffer blades.

Number of Blades.
The majority of typically, props have either three or four blades. Three-blade propellers are most typical on basic use recreational boats. With just 3 blades in the water, they run into less resistance boosting gas effectiveness, and also they usually have very little effect on your outboard engine's RPM.

Four-blade propellers boost hole-shot velocity; therefore, commonly utilized on ski watercrafts. These props improve handling and also are normally much better in harsh water.

Prop Rake.
Propeller rake is the angle that the blades angle backward. The higher the rake angle, the much more the watercraft's bow raises out of the water. A high rake angle lowers time to plane as well as boosts top-end rate. Nevertheless, if a rake is too high, the outboard electric motor will certainly operate under stress as well as experience premature wear.

A cupped Yamaha 70 hp propeller consists of a bent lip to the tracking side of prop blades. It will get better grip in the water, minimizing prop slip and air flow, and also improves hole-shot and also velocity. Cupped props permit the engine to be trimmed so the propeller is closer to the water's surface area and can dramatically reduce RPM.

Propeller Turning.
Rotation is not a concern for most boaters as most outboards revolve the propeller shaft as well as propeller clockwise. Nevertheless, a couple of run counter-clockwise, particularly in double outboard configurations in which one electric motor runs clockwise, as well as the other runs counter-clockwise for far better equilibrium. Ensure your picked prop is designed for the proper rotation.

Yamaha Prop Families.
With a conversation of numerous outboard prop qualities covered, allow's take a look at Yamaha's propeller lineup by application and general boat category.

Small & Tool Boats.

Produced especially for high-horsepower, in-line four-cylinder outboards (F150, F175, and F200). It's faster in all RPM varies than Yamaha's repainted stainless-steel propellers and also resists ventilation. It includes a brand-new SDS layout that needs no special hardware to operate.

Talon SS.

Smooth, quiet changing, and also trolling for F70-- F115 and T50/T60 outboards on pontoon, walleye, fiberglass, as well as deep-V watercrafts. They feature an updated SDS style that requires no unique equipment to function.

Light weight aluminum.

Affordable and lightweight, it gives good overall efficiency for outboards 2 HP to 225 HP, as well as a wide range of applications.

Family Members & Watersport Boats.

The Reliance household of outboard props is additionally terrific for several family boats drawing towables and also seafarers who participate in watersports.

Talon Pontoon.

Outstanding low-speed procedure, supplying greater thrust as well as control than traditional props on pontoons (even greatly loaded) using T50-F115 outboards. Functions an SDS layout that calls for no unique hardware to function.

Twin Thrust.

Utilizes the power of Yamaha's high-thrust outboards for pressing heavy lots such as sailing boats and also pontoons, as well as offers impressive reverse drive. Requirement on T9.9 and also T25, optional on T50 and T60.

Bass, Bay & Flat Boats.

An ultra-high-performance ventless style and also single-inch pitches permit you to tweak the efficiency of Yamaha's four-stroke V MAX SHO.
Selecting the Yamaha Propeller That's Best for You
Pro Collection.

This stainless-steel collection provides high performance for single-outboard boats requiring bow lift.

Talon SS4.

More powerful hole-shot than comparable 3-blade props. Outstanding on mid-range powered apartments boats or for applications needing high engine mounting heights. Fits F70 to VF115, T50/T60 K collection (4.25 ″) gearcases. Criterion Shift Dampener System (SDS).

Large Boats.
Deep Sea Collection II.

Created for bigger offshore boats, it provides extra extensive travelling range, remarkable midrange fuel performance, and better handling in rough seas. Functions a new SDS layout that calls for no unique hardware to work.

Saltwater Collection XL.

Created for the V8 F350 four-stroke outboard, these props give lots of power-to-plane, acceleration, and also top-end. The upgraded center system accommodates older Yamaha F350s.

XTO OS Propellers.

With sizes from 16 to 17 1/8 inches and raised blade surface area, XTO OS propellers are engineered to match the torque capacity of V8 XTO Offshore outboards on 50-foot and bigger boats. These props feature Yamaha's patented Change Dampener System (SDS) for a smoother ride.

If you are considering changing or updating your Yamaha prop, we wish this information assists. As mentioned at the beginning of this article, the Yamaha Propeller Selector is an important tool that is incredibly useful.
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