Attwood Boat Transom Savers: Length, Brackets & Shock Absorption

A trailer-mounted outboard support helps steady the motor during road travel. Attwood transom savers come in several telescoping ranges, with composite or heavy-duty heads, roller brackets, trailer brackets and shock-absorbing designs. Selecting by length alone can leave you with the wrong mounting arrangement.

Choose the correct support style

Match the attachment points

A trailer roller bracket contacts an appropriate roller location. A trailer-mount bracket uses the corresponding mounting arrangement. Compare the installed trailer layout with the specific model's hardware.

Measure the working span

Attwood publishes adjustable support ranges rather than a universal boat fit. Measure the working distance in the required transport position and allow for the actual support angle.

Shock-absorbing models

The 424-ADJ incorporates a spring over a 32–44-inch range. The SP-421-RB is a distinct shock-absorbing model with a 27–36-inch range and alternative mounting brackets.

Attwood transom saver comparison

Attwood MPN Design Adjustment range Head Mounting bracket
SP-400-RB Adjustable composite-head 23–35 in Composite Roller + trailer mount
4000-ADJ Heavy-duty adjustable 24–36 in Heavy-duty Roller bracket
4000-ADJ-B Heavy-duty adjustable 24–36 in Heavy-duty Trailer bracket
424-ADJ Long heavy-duty 32–44 in Heavy-duty Roller bracket
SP-421-RB Shock-absorbing 27–36 in Heavy-duty Roller + trailer mount
SP-400-RB is a composite-head unit; 4000-ADJ and 4000-ADJ-B share a range but have different bracket styles. The spring-equipped models have their own adjustment ranges.

Before choosing a replacement

  1. Identify the outboard manufacturer's approved trailering position and support method before fitting additional hardware.
  2. Measure from the intended motor support contact point to the appropriate trailer support location with the boat loaded for travel.
  3. Compare the support's specified adjustable range and exact mounting bracket type. Do not extend beyond the manufacturer limit.
  4. Inspect the rubber contact pads, adjustment hardware and trailer mounting points for wear or corrosion.
  5. Confirm secure support, steering clearance and any separate boat-to-trailer tie-downs before transport. A transom saver does not replace the tie-down straps.

Matching Attwood products

Use the exact manufacturer number to review the current product details and availability.

Related marine references

Compare Attwood Lock N’ Stow supports, which hold the motor without joining its lower unit to the trailer.

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