How to Build a DIY Outboard Transom Saver, and When to Buy One

The right tool for this job

Adjustable Transom Saver Motor Mount

Adjusts from 22.5 inches to 32.5 inches. Hot dipped galvanized carbon steel body, rubber V block and built in spring support. Two install options fit hinged bracket or center roller trailers.

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A diy outboard transom saver is a brace, usually a notched 2x4, that runs from the outboard's lower unit to the trailer to help reduce strain and bouncing on the transom and tilt hardware. Bumps between your driveway and the ramp can make a tilted outboard bounce, which can strain the transom, the bracket bolts and the tilt system. You can build one yourself, or skip the measuring and cutting with the Better Boat Adjustable Transom Saver Motor Mount, a hot dipped galvanized steel brace that adjusts from 22.5 to 32.5 inches. This guide covers both paths so you can choose the one that fits your boat, trailer and towing habits.

What Does an Outboard Transom Saver Do?

A transom saver adds support for a tilted outboard during towing and helps reduce strain and bouncing.

An outboard sits far behind the transom, so its weight acts on a long lever arm. When the trailer hits a bump, the whole rig is jolted and the motor's weight on that long lever arm lands on a few key points.

• The transom itself, which carries the motor through the mounting bolts.
• The clamp or bracket bolts.
• The tilt and trim system, including hydraulic rams on power trim motors.
• The steering linkage, which can take a beating if the motor swings side to side.

A transom saver gives the lower unit a firm rest on the trailer.

Should You Use a Transom Saver on Your Outboard?

Check your outboard owner's manual before you build or buy anything, because trailering guidance varies by engine maker and model.

Three questions decide whether a transom saver fits your setup.

1. Does the lower unit clear the road in the running position? If the skeg sits close to the pavement with the motor down, your manual may call for towing tilted, and some makers specify a particular way to support a tilted motor.
2. What does the manual say about your tow? Follow the engine maker's trailering instructions for your motor rather than a general rule about distance or road type.
3. What does the manual say about the contact point? The brace should rest only where the engine maker allows load, never the propeller or a thin fin.

If your manual addresses trailering, follow it over any general guide, including this one.

How to Build a DIY Transom Saver From a 2x4

A DIY transom saver can be a single length of 2x4 with a padded V notch at the motor end and a cradle at the trailer end, held in place with a strap.

Materials and Tools

You need lumber long enough to span from the lower unit to the trailer, padding for the contact faces and a way to keep the brace from falling out.

• One 2x4, used only if your engine maker allows a wood brace
• Marine carpet scraps or thick rubber pad for the V notch and trailer end
• Stainless staples, screws or construction adhesive to attach the padding
• A trailer rated strap to keep the brace from dropping out
• Tape measure, pencil, handsaw or jigsaw, and a drill

Build Steps

Measure with the motor at its trailering tilt, then cut the board to that length and shape both ends to seat securely.

1. Set the tilt. Tilt the motor to the angle that gives safe road clearance, as described in your manual.
2. Pick the trailer anchor point. Use only a point that both the trailer maker and the engine maker approve. It must be frame structure, not a light fender bracket or a light bar.
3. Measure the span. Measure from the lower unit contact point to the trailer anchor point. Write the number down and measure twice.
4. Cut the board. Cut it slightly long so you have material for the V notch.
5. Cut the V notch. Shape a V at one end that cradles the gearcase without touching the propeller or the skeg.
6. Shape the trailer end. Notch the other end so it sits over the approved anchor point and cannot slide sideways.
7. Pad both ends. Fasten carpet or rubber over the V and the trailer notch so bare wood never touches paint or metal.
8. Fit and snug. Set the brace in place and lower or trim the motor just until it rests firmly on the pad. Snug is enough. Do not force the trim down hard against the board.
9. Strap it. Use a strap to keep the brace from dropping out if the motor lifts over a bump. Route it and tighten it only as the strap maker instructs, and keep it snug so it does not pull the motor or brace out of position.
10. Recheck early. Stop after the first few miles and confirm the brace is seated and the strap is still snug.

A brace on a trailer works best when the rest of the rig is sorted too. Tie downs, winch straps and other towing gear are grouped in the trailering and boat trailer accessories collection.

Common DIY Transom Saver Mistakes

DIY transom saver problems can come from a wrong length, a poor contact point or no retention strap. Each one is easy to avoid once you know the cause.

Changing trailers or motors and reusing the old board can also cause trouble. A fixed length brace only fits the exact geometry it was cut for. Any change to the trailer, the motor or the bunk height means measuring again.

Engine care during the off season pairs well with a good towing setup. Flush products and fogging supplies sit in the engine maintenance collection.

DIY vs Buying a Transom Saver

A DIY wood brace works for a single fixed trailer and motor if you inspect it often, while an adjustable steel transom saver suits owners who tow regularly, change setups or want a padded contact and spring support without building anything. The table compares the two options.

The DIY route makes sense only if your outboard maker allows a wood brace and approves where it rests, and then if you tow rarely, keep the same boat and trailer for years and do not mind checking the board before each trip. Buying makes sense if you tow often, travel long distances or switch between trailers, since an adjustable brace avoids recutting.

The Better Boat Adjustable Transom Saver Motor Mount

The Adjustable Transom Saver Motor Mount is a ready made brace that supports an outboard during trailering, adjusts from 22.5 to 32.5 inches and installs on either a hinged bracket setup or a center roller trailer setup. It replaces the measuring, cutting and padding steps of a DIY build.

Features From the Listing

The listing describes a galvanized steel body, a rubber V block and spring support built for repeat towing trips.

• Adjustable length from 22.5 to 32.5 inches to fit different trailer and motor heights.
• Hot dipped galvanized carbon steel body.
• Rubber V block to cradle the lower unit.
• Spring support built into the brace.
• Two install options, one for hinged bracket setups and one for center roller trailers.

Fit comes from the adjustable length and the choice of install option.

Choosing an Install Option

Match the install option to the hardware at the back of your trailer. Use the hinged bracket option if your trailer has a bracket mount for the brace, and use the center roller option if your trailer has a center roller at the stern. Follow the product instructions for mounting details.

Installing and Adjusting

Set the motor at your manual's towing tilt, mount the trailer end, then adjust the length so the V block meets the lower unit snugly.

1. Tilt the outboard to its trailering position.
2. Attach the trailer end using the install option that matches your trailer.
3. Extend or shorten the brace within the 22.5 to 32.5 inch range until the rubber V block sits under the lower unit.
4. Lower or trim the motor just until it rests firmly in the V block. Avoid forcing it down hard.
5. Confirm skeg clearance and that the brace cannot shift, then recheck after the first few miles.

If your measured span falls outside 22.5 to 32.5 inches, this brace will not fit that setup, and a custom DIY length may be the better choice.

Shop the Adjustable Transom Saver Motor Mount

When the boat is parked between trips, a fitted cover and storage gear from the covers and storage collection help keep the motor and deck clean.

Frequently Asked Questions

Is a 2x4 strong enough to use as an outboard transom saver?

Check your engine maker's trailering instructions first, since safe support depends on your motor and setup. A 2x4 must be the correct length, padded and strapped in place. Use pressure treated lumber, check it for splits and soft spots before each tow, and replace it at the first sign of damage. If your manual does not address a wood brace or you are unsure it suits your motor, check with the engine maker before relying on one.

Do all outboard manufacturers recommend using a transom saver?

No, trailering guidance varies by engine maker and model. Follow your own owner's manual.

Should you trailer an outboard tilted up or in the down position?

It depends on road clearance and your manual. If the skeg sits close to the pavement in the running position, your manual may call for towing with the motor tilted, and some makers specify how to support it. If it clears the road comfortably and your manual allows it, the down position may be acceptable.

How tight should a transom saver be against the lower unit?

A transom saver should be snug, with the motor resting firmly on it, not forced down hard. Lower or trim the motor just until it seats, then stop. Excess pressure from power trim can load the trim system instead of protecting it.

Why does a transom saver need a strap if it fits snugly?

A strap keeps the brace in place when a big bump lifts the motor for a moment. Without one, a fixed DIY brace can drop onto the road, leaving the motor unsupported for the rest of the trip.

How to make your own transom saver?

A DIY transom saver is a length of lumber cut to span from the lower unit to a trailer frame member that the trailer maker approves, measured with the motor at the towing tilt in the owner's manual and used only if the engine maker allows that contact point. Cut a V notch at the motor end so it cradles the gearcase without touching the propeller or skeg, pad both ends with marine carpet or rubber, and add a strap so the brace cannot drop out over a bump, routed and tightened as the strap maker instructs. Fit it snug without forcing the motor down, and recheck it after the first few miles.

Do transom savers actually work?

A transom saver gives the lower unit a firm rest on the trailer, which helps reduce strain and bouncing on the transom, mounting bolts and tilt system. Results depend on correct length, a padded contact point on the gearcase and a snug fit, and engine makers differ on trailering guidance, so check the owner's manual first. For frequent towing, the Better Boat Adjustable Transom Saver Motor Mount adjusts from 22.5 to 32.5 inches and adds a rubber V block and spring support.

What is the best transom saver for an outboard motor?

The best transom saver is the one that matches the motor's trailering guidance in the owner's manual and fits the trailer and motor height. An adjustable brace suits frequent towing or changing setups. The Better Boat Adjustable Transom Saver Motor Mount adjusts from 22.5 to 32.5 inches and has a rubber V block, spring support, and hinged bracket or center roller install options.

The Bottom Line

A diy outboard transom saver built from a padded, strapped 2x4 may suit a single boat and trailer if your manual allows it, when you measure carefully and inspect it before every tow. If you tow often, change trailers or would rather not cut and pad lumber, the Better Boat Adjustable Transom Saver Motor Mount adjusts from 22.5 to 32.5 inches, pairs a rubber V block with spring support and installs on hinged bracket or center roller trailers. Either way, start with your outboard manual and set the motor at the towing tilt it specifies.

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