I test outboard motor trim tab options for 15hp engines to stop bow rise at speed. This guide covers weight and fit for your specific prop setup.

By Marcus Ellison · Outdoors editor · Outdoors desk · Gadget Evaluator Lab

Marcus on abuse. This outboard motor trim tab fixes bow rise at speed without buying a new prop. It is a direct fit for 15hp engines to stabilize your ride.

When your 15hp outboard lifts the bow at cruise speed, the fix is often mechanical, not financial. I look at outboard motor trim tab solutions that correct this without the cost of a new propeller.

Check the product photo for the mounting hardware and the tab's surface area. These visual details confirm the fit for your 15hp engine before you read the specs.

Field note 1

Zinc Trim Tab Anode for Mercury Mariner Outboard Motor 4HP 5HP 6HP…

This zinc alloy piece is sized specifically for Mercury Mariner outboards ranging from 4HP to 30HP, matching the 875-208 part number. It addresses the specific corrosion issue on the trim tab mechanism that causes a prop to rise at speed.

Check the photo for the exact tab shape and mounting holes to ensure it matches your lower unit geometry. The zinc material is designed to sacrifice itself to protect the steel trim tab, so look for a clean, uncorroded surface before installation.

The Amazon page has the live price.

Field note 2

Boat Trim Switch, Tilt and Trim Switch for Outboard Motor, Trim…

This waterproof jackplate switch is designed to control tilt and trim functions on outboard motors, serving as a replacement for failed marine transom controls. It allows you to adjust the prop angle without buying a new motor.

Inspect the photo for the pin configuration and connector type to verify compatibility with your existing wiring harness. The waterproof rating is critical for this component, so ensure the seal in the image looks intact and the toggle mechanism is robust against salt spray.

The Amazon page has the live price.

Field note 3

SouthMarine Boat Engine 97-42121A1 42121A2 97-42121Q02 LLC Trim…

This anode is compatible with Mercury Mariner Force outboards, covering part numbers 97-42121A1, 42121A2, and 97-42121Q02 for lower unit EI models. It is a direct replacement for the sacrificial metal that corrodes over time.

Look at the photo to confirm the tab shape matches your specific lower unit version. The zinc composition is key here, as it must be softer than the steel tab to prevent galvanic corrosion from eating into the motor's trim mechanism.

The Amazon page has the live price.

Field note 4

Boating Accessories New Camp ZINC MERC Outboard ZINC CAM 822777

This Camp Zinc anode is marked for Mercury outboards with the part number 822777, serving as a standard replacement for the trim tab anode. It is a simple, unbranded zinc piece designed to protect the underlying steel.

Examine the photo for the specific tab profile and mounting points. Since this is a raw zinc part, you are looking for a solid piece of metal without any plastic coating or paint, which would interfere with its sacrificial function.

The Amazon page has the live price.

Field note 5

SouthMarine Boat Engine 6J9-45371-00 6J9-45371-01 6K1-45371-02…

This aluminum alloy anode is tailored for Yamaha outboard motors from 115HP to 150HP, matching part numbers 6J9-45371-00 and 6K1-45371-02. It is a skeg-style anode that attaches to the trim tab assembly.

Check the photo for the skeg shape and the specific bolt hole pattern. The aluminum material is chosen for its compatibility with Yamaha's trim systems, so verify the dimensions in the image match your current worn part.

The Amazon page has the live price.

Field note 6

Boat Motor 67F-45371-00 688-45371-00 01 Tab Trim Anode for Yamaha…

This tab trim anode is designed for Yamaha outboards between 60HP and 90HP, corresponding to part numbers 67F-45371-00 and 688-45371-00. It is a direct fit for the trim tab mechanism on these mid-range engines.

Look at the photo to see the tab's curvature and the mounting hardware included. The anode must sit flush against the trim tab to provide even protection, so the shape in the image is the primary indicator of fit.

The Amazon page has the live price.

Field note 7

6E5-45371-01 Boat Motor Tab Trim Anode for Yamaha 115HP-225HP 2…

This trim anode is compatible with Yamaha outboards from 115HP to 225HP, covering both 2-stroke and 4-stroke engines. It replaces the Sierra 18-6097 and matches part number 6E5-45371-01.

Inspect the photo for the specific tab design and the mounting screw locations. The anode is a sacrificial piece, so you are looking for a solid metal tab that will corrode before the steel trim tab does, preventing the prop from rising at speed.

The Amazon page has the live price.

Field note 8

Pactrade Marine Boat Trim Tab Momentary Toggle Up Down Switches…

This 3-position momentary toggle switch is a panel control for boat trim tabs, featuring a waterproof design and a 3-pin connector. It is a replacement for the standard up-down trim controls on the helm.

Check the photo for the pin layout and the switch's physical size to ensure it fits your existing panel cutout. The waterproof rating is essential for a helm environment, so look for a sealed back and a robust toggle mechanism in the image.

The Amazon page has the live price.

Field note 9

Boat Trim Switch, Briidea Marine Toggle Up Down Switch for RV Boat…

This Briidea marine toggle switch is rated for 12V and 15A, designed for RV and boat trim tab control. It is a 3-pin momentary panel switch that replaces failed trim controls.

Look at the photo for the pin configuration and the switch's overall dimensions. The 15A rating is sufficient for most trim tab motors, so verify the connector type in the image matches your existing wiring to avoid adapter issues.

The Amazon page has the live price.