TMM 700 Transom Motor Mount

The W700 Transom Motor Mount (TMM) fits 20″ long (L) outboard motor shafts.


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.

  • Price:  $190.
  • Shipping:

No extra charge when shipped together with a Wavewalk 700.
We do not sell or ship this item separately.

W700 Transom Motor Mount (TMM)

Design, Materials, and Construction

In order to provide this motor mount with extra strength, we use a ‘caisson’ design in combination with the traditional tab-and-slot technique.

The TMM 700 is made from 3/4″ thick Medium Density Overlay (MDO), and coated with urethane.
MDO is a composite product made from wood and polymer resin (plastic). We’ve been using MDO successfully since 2012 in saddle brackets, and since 2014 in motor mounts.

The bolts, washers and nuts used in this motor mount are made from zinc plated steel.

W700 HD transom motor mount assembly 1024
W700 HD Production batch – Click image to enlarge

The parts from which the TMM 700 is made are cut with a computerized router for maximal precision, best fit, and optimal strength.
Each part is individually coated with urethane, in order to waterproof it.

We assemble each W700 HD motor mount by hand, using waterproof adhesive.

Dimensions and Technical Specifications

  • Width:  23.5″ (60 cm)
  • Total Height:  6″ (14 cm)
  • Mounting Plate Height: 5″ (12.7 cm)
  • Depth:  6.5″ (16.5 cm)
  • Weight:  4 lbs (1.8 kg)
  • Horsepower Compliance:   We do not recommended using the TMM 700 motor mount with outboard motors stronger than 3 HP, in order to comply with the max recommended horsepower for the W700 itself, which is 3 HP.


Installation is easy and should take less than five minutes:

Where to install?
W700 MDO heavy duty saddle bracket
Click image to enlarge

The rear end of the cockpit is where the Heavy Duty (HD) Medium Density Overlay (MDO) bracket a.k.a. “Wooden Bracket” is installed.
Every W700 comes with such a bracket, standard.



Position the TMM 700 motor mount on the hull tips, exactly where you want to attach it – The closer to the cockpit’s rear the better.
Mark the two spots where you need to drill holes for the eye bolts, and drill them with a 3/8″ drill bit.

Attach the motor mount very tightly using the wooden knobs, and make sure they are positioned with the tee nuts facing down.

Tip: Using a 5/16″ nut to help lock the the wooden knob in place can reduce the need to check its tightness, although we recommend to keep checking it.

W700 HD motor mount position
The W700 HD motor mount ready for a 20″ (long) shaft outboard motor, which is the only type of motor that we recommend.

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.

Do not 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.

2 thoughts on “TMM 700 Transom Motor Mount”

  1. Nice, now the W700 has a motor mount toooooo. 🙂

    Can’t wait to see the W700 when you get it in.

    I’ll get my popcorn ready when you make your demo movie.

    It’s going to be great, the W500’s Big Brother!

    Tight lines and MoPaddle Safe all.

  2. My head is already buzzing with all kinds of goofy ideas for shooting video with the W700 😀
    Starting with the fact that our demo boat here will be all-white, both the twinhull and saddle, namely like a boat, ha ha!


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