Tag Archive: 3.5 hp outboard motor

Driving the S4 in rough water in a big boat’s wake (movie)

We wanted to show the Wavewalk S4 going in rough water, but since we couldn’t find water that was choppy enough in Key Largo, we made our own chop 😀
Larry drove his commercial fishing boat, the Line Dancer, Orit sat at the stern and shot video with our new Nikon camera equipped with a X83 optical zoom lens (great camera), and I drove an S4 in the boat’s wake.

The Line Dancer’s wake was V shaped, with pronounced “ridges” of waves and turbulence on both sides, and a quieter area in between.
When we went in open areas where the tidal current and wind created natural chop, adding the boat’s wake on top generated pretty hectic conditions that were a bit challenging to drive through, mainly because the motor on my S4 was a little 3.5 HP that didn’t allow for much planing and playing. This application calls for a more powerful motor, and a 6 HP outboard would have probably yielded more spectacular action shots. But at least we were able to demonstrate the principle…
When we drove in quieter zones, I just surfed the Line Dancer’s wake, and that was easy and fun.

 

 

What’s the real-world advantage of the S4’s ability to go through fast currents and chop?
“Real World” usually means you have to go from point A to point B, and you’re not just looking for some driving action fun. This can happen when you use the S4 as a tender for a bigger boat, or yacht, or when you drive in fast rivers that are swollen by water from melting snow in spring, or by tidal currents in coastal areas.
Jon boats and skiffs don’t excel in such conditions, to say the least, and inflatable dinghies are neither the most comfortable nor the most reliable choice. But the S4 shines in the chop, not just due to its natural, physical, “catamaran” stability, but also because it offers the driver to ride a saddle seat similar to the seat that other high performance vehicles feature, such as personal watercraft (PWC a.k.a. “jet ski”), all-terrain vehicles (ATV), snowmobiles, and dirt bikes.

 

 

Shelling in the barrier islands with our Wavewalk S4

By Fin Gold

North Carolina

I created a custom trailer for “The Dub” [Wavewalk S4] out of an old sailboat trailer. We took it to a local boat ramp and motored about an hour through the marshes to a barrier island to go shelling. Made it there and back in fine style.

We got some funny looks from people watching us go by and watching me launch the boat with one finger!

Loving our Wavewalk!

 


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Wavewalk S4 in blue water

Wavewalk S4 driven in choppy blue water in the Atlantic ocean close to Key Largo, Florida.
It was fun to drive this watercraft that seems to be almost immune to waves, wherever they come from.
Hopping on waves and making sharp turns was easy solo and with a passenger on board.

As a skiff, it’s extremely seaworthy, and as a kayak it’s anything but 😀

We towed it behind the mother ship, and it was a pleasure to watch how well it behaved… It can serve as a perfect boat tender for a big boat or a yacht – It’s seaworthy, comfortable, fun to drive and to paddle, can be beached anywhere, and it can carry up to three people on board.

The S4 in this movie is under powered by a 3.5 HP outboard motor – A 6 HP outboard would have worked better in this case, but still, driving this ultralight microskiff in the chop was a lot of fun. Thankfully, the S4 is not a solo skiff, and driving it with a charming passenger on board was even more fun.

We didn’t have to outfit it with a spray shield, as hardly any spray got it.

 

 

 

 

Special thanks to Captain Larry Jarboe of Wavewalk Adventures in Key Largo.

Gold’s S4 – pics and videos of first tests

By Fin Gold

North Carolina

Fin lives next to the ocean, and he loves fishing in shallow water. He’s been fishing out of an 18 ft skiff, but being a big boat with a heavy motor, that skiff drafts 18″, which is less than optimal for shallow water, especially at low tide, when the risk of getting stranded increases. Fin and his family also didn’t like how their big skiff felt in choppy water, and how it reacted to other boats’ wakes. Fin ordered an S4 with the intention of having it replace his 18 ft skiff. After he and his wife tested their S4, they decided to sell their skiff. The S4 will also replaces their tandem kayak. Says Fin: –

The video where I slide it down the ramp is the very first time trying it out.
The young guy on the boat is my youngest son Adam. He is a student and he was excited beforehand. Then he loved testing it out.

The videos are all at less than 1/2 throttle as we follow the 3.5 hp Tohatsu engine break-in procedure.

The S4 also lets us explore all the coastal islands where previously we could only take a kayak.

One question​ we had was the best position for the engine tilt. It looks like it has 5 holes for tilt and it came in the center hole. Any advice for that?

Here are the first pictures and videos. All unedited happiness.


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How much HP for my S4 skiff’s outboard motor?

This article summarizes research performed by Captain Larry Jarboe, as well as inputs from Wavewalk dealers and S4 clients. Its purpose is to answer a frequently asked question (FAQ) from prospecting clients, which is “What outboard motor should I choose for my S4?”

The answer is that the outboard motor you should choose for your S4 depends on two factors, which are

  1. How much power you need
  2. How important is the motor’s weight for you

And there is a trade-off between power and weight, namely that the more powerful the motor, the heavier it is, and the harder it could be to carry it.
In any case, the motor should be a 20″ log shaft (L) model, and not a 15″ short shaft (S) model.

2 HP outboards

Outboard motors in this class weigh around 30 lbs, which makes them fully portable even for a user who’s not very strong. A 2 HP motor can propel an S4 skiff with one person on board at speeds up 8 mph, even in choppy water. This speed would decrease as the boat is required to carry more passengers on board. S4 owners who tested such motors with their S4 skiff reported that the boat felt under powered, which means that they felt like going faster, but the motor lacked the powered required for this. For this reason 2 HP motors are not popular with S4 users. Another reason for their lack of popularity is the fact that being air cooled makes them noisier than water cooled motors.

3.5 HP outboards

Outboard motors in this class weigh around 40 lbs, which makes them still portable, but less so than 2 HP motors. A 3.5 HP motor can propel an S4 skiff with one person on board at speeds up 14 mph, even in choppy water, and it can propel the boat at 12 mph with three passengers on board in  moving water. This size motor is the most popular among S4 and W700 users, as it offers a good trade-off between power and weight for people who must lift the motor or carry it by hand over long distances.These motors are also less expensive than bigger ones.

6 HP outboards

Outboard motors in this class weigh around 60 lbs, which makes them portable only for very short distances, and not for everyone. A 6 HP motor can propel an S4 skiff with one person on board at speeds up 18 mph, and it can propel the boat at 14 mph with three passengers on board. 6 HP motors are the second most popular motors among S4 users.

8 HP outboards

Outboard motors in this class weigh around 80 lbs. At such weight, these motors can no longer be considered as portable, and the only reason to use them is the fact that they are offered with electric ignition, which eliminates the need to start them by pulling a cord. The S4 outfitted with an 8 HP motor performs well in choppy water, but it could feel over powered for an inexperienced driver, which should avoid using such motors with their S4. Heavy users may benefit from driving with a U-jointed tiller extension, in order to move some weight forward from the stern to the middle of the boat.

6.5 HP mud motors

Mud motors are bulkier and heavier than regular outboard motors. A 6.5 HP mud motor weighs around 80 lbs, and it’s not portable. The reasons you’d want to use such a motor instead of a regular outboard of similar power are if you need to go in very shallow water (skinny water) and mud, and if you fish or hunt in water with plenty of vegetation and underwater obstacles. The S4 performs very well with a such a mud motor. We do not recommend using less powerful mud motors because typically, these motors require more power than regular outboard motors do.

Electric outboard motors

Some electric trolling motors are described by their manufacturer as “outboard motors”, namely comparable in power to small outboard gas engines. If you consider such electric motors, we recommend remembering the laws of physics, and applying the formulae for Kilowatts to Horsepower conversion, which are:

  • 1 KW = 1.34 HP
  • 1 HP = 0.745 KW