Sierra Aluminum Outboard Anode 18-6249A, Replaces 43396A2, 818298A1, Q1, Fits 175HP/150EFI/200EFI Transom Mount Bracket

The Sierra 18-6249A is an aluminum sacrificial anode built to protect the transom mount bracket on 175HP, 150EFI, and 200EFI outboards (S/N OG303046 & Up) from galvanic corrosion. As current flows through the metal components of an outboard's lower unit and mounting hardware in saltwater or brackish conditions, a sacrificial anode corrodes in place of the more expensive bracket, propeller, and drive components it protects. Aluminum anodes such as the 18-6249A are commonly chosen for brackish and freshwater use, and they wear away visibly over time, giving boat owners a simple, low-cost way to gauge the health of their corrosion protection system during routine inspections.

This anode is a direct fit for the transom mount bracket on the specified engine range and is designed as a bolt-on replacement, making it a straightforward maintenance item to swap during winterization or a seasonal haul-out. Sierra also offers a zinc version of this anode under a separate part number for owners who run primarily in saltwater and prefer zinc's faster sacrificial action; the 18-6249A is the aluminum option.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-6249A
• Product Type: Anode
• Material: Aluminum
• Weight: 0.54 pounds
• Product Dimensions: 0.39 x 0.39 x 0.39 inches
• UPC: 808282176129
• Fitment: Transom mount bracket, 175HP/150EFI/200EFI (S/N OG303046 & Up)

Fitment

Fits the transom mount bracket on 175HP, 150EFI, and 200EFI outboard engines with serial number OG303046 and up.

Replaces (OEM)

43396A2, 818298A1, Q1

Frequently Asked Questions

What does the Sierra 18-6249A anode fit? It fits the transom mount bracket on 175HP, 150EFI, and 200EFI outboard engines with serial number OG303046 and up.

Is the 18-6249A made of aluminum or zinc? The 18-6249A is the aluminum version of this transom mount bracket anode. Sierra also sells a zinc version, part number 18-6249, as a separate SKU for buyers who prefer zinc.

What OEM part numbers does this anode replace? Sierra 18-6249A replaces OEM numbers 43396A2, 818298A1, and Q1.

How much does the 18-6249A weigh? The anode weighs 0.54 pounds.

What are the dimensions of this anode? It measures 0.39 x 0.39 x 0.39 inches.

Why choose an aluminum anode over zinc? Aluminum anodes like the 18-6249A are a common choice for brackish and freshwater use, while zinc, such as the alternate 18-6249 part number, is more commonly chosen for saltwater use.

Is the 18-6249A a genuine Sierra part? Yes, 18-6249A is a genuine Sierra manufacturer part number, not a generic or unbranded substitute.

Will this anode fit an engine outside the S/N OG303046 range? The 18-6249A is specified for the transom mount bracket on 175HP/150EFI/200EFI engines with serial number OG303046 and up; engines outside that serial range are not covered by this listing.

How do I know when to replace this anode? Sacrificial anodes like the 18-6249A corrode over time in place of the metal components they protect, so visible wear and material loss on the anode indicate it is time for replacement.

What is the UPC for the Sierra 18-6249A anode? The UPC for the Sierra 18-6249A anode is 808282176129.