Identify Attwood Transom Savers by Range and Mounting Bracket
An Attwood trailer-to-outboard transom saver can be identified by its adjustment range, motor contact head and trailer-end bracket. Two units with the same length can use different mounting arrangements, so confirm the full part number rather than relying on appearance.
Exact model comparison
| Attwood MPN | Length range | Head / feature | Mounting |
|---|---|---|---|
| SP-400-RB | 23–35 in | Composite head | Roller and trailer brackets |
| 4000-ADJ | 24–36 in | Heavy-duty head | Roller bracket |
| 4000-ADJ-B | 24–36 in | Heavy-duty head | Trailer-mount bracket |
| 424-ADJ | 32–44 in | Shock-absorbing spring | Roller bracket |
| SP-421-RB | 27–36 in | Shock-absorbing spring | Roller and trailer brackets |
Before choosing a replacement
- Measure the required span with the boat and motor positioned for transport.
- Identify whether the trailer support point uses a roller or separate mounting bracket.
- Inspect the motor-contact head, locking hardware and adjustment tube for wear.
- Check any spring for damage and make sure the length adjuster still locks securely.
- Check the listing for supplied brackets and components; used-part viewing and pickup are by appointment in Kelowna.
Matching Attwood parts
Related marine trailering support
Attwood Lock N’ Stow supports for specific outboards. Transom savers do not replace boat-to-trailer tie-down straps.
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