Yamaha - Internal Crankcase Anode Kit - F90, F115 Corrosion Protection - 2000–2003

Overview

On the early F90 and F115 models, these internal anodes are doing the kind of work you never see but definitely rely on. They’re designed to take on corrosion before it reaches the engine’s internal metal surfaces, which is especially important if the motor runs in saltwater. Over time, they wear down doing their job, and once they’re gone, that protection disappears. Replacing them along with the grommets is simple maintenance that helps keep your engine protected and running strong.

Key Features

• Internal Corrosion Protection – Sacrificial anodes help prevent electrolysis from damaging internal engine components.

• Complete Kit with Grommets – Includes both anodes and matching grommets for proper fit and sealing.

• Designed for Early Models – Built for Yamaha F90 and F115 outboards from 2000 through 2003.

• Preventative Maintenance Essential – Helps extend engine life by protecting internal metal surfaces over time.

Engine & Boat Compatibility

• F90 2000–2003
• F115 2000–2003

FAQ

Q: How often should I replace these internal anodes?
A: Typically once per season, or more often if the engine is used in saltwater regularly.

Q: What happens if I don’t replace them?
A: Corrosion can begin attacking internal engine components once the anodes are worn out.

Q: Are the grommets important to replace too?
A: Yes, they ensure proper sealing and secure installation of the anodes.

Q: How do I know if the anodes are worn?
A: If they’re heavily corroded or significantly reduced in size, it’s time to replace them.

Q: Is this a difficult job?
A: It’s usually straightforward with basic tools, depending on engine access.

• Engine Application
  • F90 2000–2003
  • F115 2000–2003