The last thing you want is to get into the middle of a repair or maintenance job and realize you don’t have the right tool to get the job done, or to waste time and money on something that has an easier solution. Our line of Lower Unit Tools includes some of our own personally developed tools that make tough, potentially damaging tasks easy and safe — saving you time, money, and peace of mind.
Bearing Retainer Tool Bravo III 91-805382T (SKU #AMT0064): $197
The Bearing Retainer Tool Bravo III, compatible with Mercruiser Bravo III Drives, enables you to install or remove bearing retainers with ease — no need to pay someone else through the nose to do it.
Bravo II Prop Nut Socket 805457-1 (SKU #AMT0062): $49
The Bravo II Prop Nut Socket is compatible with Mercruiser Bravo II prop nuts.
Clamp Plate Mercury 91-43559T (SKU #AMT0079): $29.77
This Clamp Plate is compatible with all Bravo drive units. Use it to hold a preload while you check the backlash and bearing preload on your drive unit.
Drive Shaft Collar Adapter (SKU #AMT0013): $25
Our innovative Drive Shaft Collar Adapter makes it easy to remove a Yamaha drive shaft collar — no need to use other destructive, time-consuming methods. Get it separately, or included with the Upper Bearing Carrier Puller (see below).
Driveshaft Ring Nut Wrench - Replaces YB-06674 (SKU #AMT0075): $75
This Driveshaft Ring Nut Wrench is compatible with Yamaha 4 and 6 cylinder 4-Stroke 150-300hp 2.8L & 4.2L Outboards and easily removes the retaining ring from the lower unit draft shaft.
Gearcase Adapter Set (SKU #K1022): $14)
Our Gearcase Adapter Set includes fittings for leak-free hose connections.
Gearcase Pressure/Vacuum Tester (SKU #AMT0095): $139
With this Gearcase Pressure/Vacuum Tester, you can check for leaky gearcase seals before the symptoms of seal degradation have a chance to appear. An adapter set is included, compatible with most outboard models.
Lower Bearing Carrier Puller (SKU #AMT0017): $277
Lower bearing housings can be tough to remove, but this Lower Bearing Carrier Puller makes the job quick and easy, without damaging the carrier in the process. Its adjustable arms fit most gearcases 115 hp and above.
Mercury Bearing Retainer Wrench Replacement 91-43506T (AKU #AMT0071): $36.99
The Mercury Bearing Retainer Wrench Replacement allows you to easily and quickly remove or install driveshaft bearing retainer nuts. It’s compatible with some Mercruiser Sterndrives and Mercury outboard gearcases.
Mercury Prop Shaft Carrier Installer Tool (SKU #AMT0072): $45
The Mercury Prop Shaft Carrier Installer Tool makes it easy to remove 6-15hp Mercury outboard lower bearing carriers.
Bravo I and Bravo II Drive Shaft Adapter 91-61077T (SKU #AMT0065): $25.77)
This Bravo I and Bravo II Drive Shaft Adapter slides onto the driveshaft, providing a wrench surface to easily turn the shaft or remove the pinion gear nut. It’s compatible with the driveshaft on Bravo I and Bravo II outdrives, as well as the propeller shaft on MC-I, R-MR, Alpha One, Alpha One/Gen II, Bravo I and TRS drive units.
Prop Shaft and Bearing Housing Removers
Our Pro Shaft and Bearing Housing Removers connect a slide hammer to the prop shaft for easy bearing carrier removal.
- Prop Shaft and Bearing Housing Remover (SKU #AMT0054-001): $25
- Honda 9.9-15hp (SKU #AMT0054-007): $25
- Johnson 2-Stroke (SKU #AMT0054-003): $25
- Johnson/Evinrude 25-35hp (SKU #AMT0054-006): $25
- Mercury (SKU #AMT0054-008): $25
- Mercury/BRP (SKU #AMT0054-004): $25
- Yamaha 20-30HP (SKU #AMT0054-002): $25
- Yamaha 30-100hp (SKU #AMT0054-005): $25
Lower Retaining Ring Wrench - Set (SKU #K1003): $299
The Lower Retaining Ring Wrench Set includes eight retaining ring wrenches and a wrench handle. The wrenches are compatible with lower carrier nuts from Yamaha, Honda, Mercury, and Mercruiser. The handle and ring wrenches are also sold separately (see below).
Retaining Ring Wrenches
Our Retaining Ring Wrenches remove retaining rings for easy removal of the bearing carrier. The wrenches and Retaining Ring Wrench Handle are sold separately, or in a full kit (see above).
- 104mm OD, 12 Tooth (SKU #AMT0032-005): $41
- 109mm OD, 16 Tooth (SKU #AMT0032-004): $41
- 61mm OD, 4 Tooth (SKU #AMT0032-006): $41
- 69mm OD, 12 Tooth (SKU #AMT0032-001): $39
- 87mm OD, 12 Tooth (SKU #AMT0032-002): $42
- 92mm OD, 8 Tooth (SKU #AMT0032-009): $39
- 94mm OD, 12 Tooth (SKU #AMT0032-003): $48
- 99mm OD, 12 Tooth (SKU #AMT0032-007): $41
Retaining Ring Wrench - Handle (SKU #AMT0031): $59
The Retaining Ring Wrench Handle works with our retaining ring wrenches, as well as the Volvo Penta Prop Nut Wrench and the Volvo Penta Bearing Carrier Remover.
Volvo Penta Prop Nut Wrench - 3855876 (SKU #AMT0076): $39
The Volvo Penta Prop Nut Wrench makes it easy to remove duo prop front propeller nuts. It attaches to either a 1/2" ratchet or the Retaining Ring Wrench Handle (AMT0031).
Volvo Penta Bearing Carrier Remover - 3850707 (SKU #AMT0074): $68
The Volvo Penta Bearing Carrier Remover makes it easy to remove the bearing carrier on a Volvo Penta. It attaches to the Retaining Ring Wrench Handle (AMT0031).
Universal 3 Blade Propeller Puller (SKU #AMT0066): $159
This Universal 3 Blade Propeller Puller makes it easy to remove stuck 3-blade propellers. Its straps fit both small and large propellers.
Upper Bearing Carrier Puller (SKU #AMT0016): $189
Our Upper Bearing Carrier Puller is a patent-pending solution for easily removing upper bearing carriers. The adjustable arms fit most upper bearing carriers, and it comes with a Yamaha Drive Shaft Adapter included.
Shift Shaft Wrench - Yamaha, Mercury, Suzuki (SKU #AMT0036): $19.50
This Shift Shaft Wrench allows you to easily shift in and out of gear, saving your shift shaft splines from damage. The double-headed wrench is compatible with Mercury, Suzuki, and Yamaha 100HP and above.
Shop Marine Tech for All Your Lower Unit Needs
Whether you’re just missing that one retaining ring wrench or you need a time-saving tool to help you remove stubborn bearing carriers damage-free, we’re here to help save you precious time and money on repairs so you can focus on getting back out there on the water. We’re proud to offer 24/7 online support, free shipping on all domestic orders, and a 100% money-back guarantee on your purchases.
