Wavewalk® Kayak Transom Motor Mount For 20″ Long Propeller Shaft



Fishing yayak transom motor mount

Wavewalk  kayak transom motor mount


Wavewalk® Model TMM 20 For motors featuring a 20″ long propeller shaft.

IMPORTANT: We recommend using 20″ (long) shaft motors, since they can be mounted at the rear end of the cockpit, and not a few inches behind it. When the motor is closer to you, it’s easier for you to start it and access its controls, and it makes steering easier. Only 20″ long (L) outboard motors fit outboard manufacturers’ requirements for the depth of the anti-ventilation plate below the boat’s lowest point. Do not use 15″ short (S) outboard motors with this motor mount.

Kayak Compatibility: This Wavewalk® Kayak Transom Motor Mount fits W kayaks from the 500 series.

Motor Compatibility: The Wavewalk® Kayak Transom Motor Mount fits electric trolling motors, and outboard gas motors up to 3 hp.
Important: We recommend outfitting the motor with a long, articulated tiller extension that enables the driver to steer from the middle of the cockpit and not from its rear.
Important: This model of Wavewalk® Kayak Transom Motor Mount can take only a motor featuring a 20″ long shaft. A motor with a shaft shorter than 20″ would be useless for steering if mounted on it, since its propeller would turn in the space between the W kayak hulls, and not below them.

Material: The Wavewalk® Kayak Transom Motor Mount is crafted from 1″ thick Trex board.
Trex is an environmentally friendly, composite material made from recycled and reclaimed plastic, and reclaimed wood. No trees are cut down for the purpose of making Trex. This material is widely used as decking and railing material since it will not splinter, rot or deteriorate due to harsh weather or insects. Trex resists damage from moisture and sunlight, which makes it a better alternative to wood for this matter. Unlike wood, Trex requires no painting, coating or maintenance.

Dimensions: This Wavewalk® Kayak Transom Motor Mount is 4.25″ high and 22″ wide, and it weighs 6 lbs.

Attachment: This Wavewalk® Kayak Transom Motor Mount is easily attached to the W kayak by means of two bolts. We recommend attaching the W Kayak Transom Motor Mount as close as possible to the cockpit, in order to improve stability, access to the motor, control, and safety.

  • Price:  $95.
  • Shipping:

No extra charge when shipped together with a Wavewalk TM kayak
When shipped separately: $20 S&H in the continental US (48 states)
When shipped separately: $25 S&H to Canada and Alaska

Attaching Instructions For This Motor Mount Model

How to attach transom motor mount to kayak

  1. Remove the bungee hooks from the cockpit rear
  2. Place the Wavewalk® Kayak Transom Motor Mount on the deck, in the location where you’re going to attach it, preferably as seen in these images
  3. Mark the position of the two holes, and remove the mount
  4. Drill the two holes in the deck with a drill bit whose size is slightly bigger than the bolts’ 5/16 diameter.
  5. Install the bungee hooks back in their place
  6. Insert the bolts in the mount’s holes, put the mount in its place, and push the bolts down, into the hulls
  7. Tighten the nuts with the metal part facing downward, to secure the mount in its place

The kayak’s plastic wall will get squeezed between the mount’s horizontal plate and the nuts.

How to attach transom motor mount to kayak

More about motorizing your Wavewalk® kayak »

Safety and Operation


Before going on a motorized trip, verify that the wide wooden bolt knobs that secure the motor mount to the boat are safely tightened to the maximum. Failing to tighten the bolt knobs could result in unwanted vibrations and noise. If you feel such unusual vibrations and/or hear unusual noise, stop the motor, turn around, and tighten the bolt knobs to the max.
Driving with loose bolt knobs is hazardous, similarly to driving with the motor’s clamp screws loose, and it could result in an accident.

Never operate the motor without the motor’s stop switch (“kill-switch”) attached to your arm.

For motor operation and maintenance please refer to the motor’s owner’s manual.



  1. John F.

    Touring, fishing, hunting, and now motor boating. Truely a versatile kayak!

  2. W kayak

    And sailing too! 🙂 …

  3. Sungjin Kim

    It’s very simple and easy !
    And looks beautiful!

  4. W kayak

    Thanks Sungjin,
    It’s also easy to make, for those who don’t necessarily want to buy it from us 😉

  5. Rox

    Another great design brought to you by Wavewalk.

    It is a beautiful motor mount, and best of all, light weight and will not rot from getting wet.

    What is best about the mount, you could leave it on at all times.

    It won’t get in the way of getting in and out of the W500.

    Tight Lines and MoPaddle safe all.

  6. W kayak

    Thanks Rox,
    I’m glad you like it!
    We made 4 prototypes before we came up with this design, and that’s without counting the early designs from Sungjin, Gary T, and yourself 🙂
    We contracted a local craftsman named Matt Cross who’s doing a superb job turning the Trex boards into something that’s as pleasing to the eye as it is sturdy.
    Each side of this mount is assembled using 6 decking screws (total 12), to assure many years of service.

  7. Dave Sizemore

    Good looking motor mount. I have a 2 H.P. long shaft Honda that I would like to try out. How do I buy one?

    Do I attach eyelets to the motor mount to hold the bungee for the flotation of just leave a bit of room for them?

  8. W kayak

    You can order a motor mount for your W kayak, and we’ll mail it to you for $25 S&H.
    You don’t attach eyelets to the motor mount, but preferably on the sides of the W kayak:

  9. Anonymous

    at first, using decking material for a motor mount seemed inappropriate to me, but on a second thought this thing is used in outdoor pools and spas, and the way you designed your mount makes it look not too bad.

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