Extend your Mercury engine’s life with this premium OEM BOOT ASSEMBLY, STOP SWITCH. Factory-engineered for durability in harsh marine conditions that destroy inferior parts.

Manufactured to strict Mercury Marine quality standards, this switch ensures reliable operation across all engine RPM ranges. Part number 11099A1 is manufactured to exact Mercury Marine factory specifications for precision installation and optimal performance. Constructed from premium marine-grade materials designed to withstand harsh saltwater and freshwater environments.

Aftermarket parts might save a few dollars upfront, but genuine Mercury Marine part 11099A1 saves you money long-term by lasting years instead of months. Factory precision means perfect fit — no modifications, no surprises.

Compatible Mercury Marine Engines

FITS: 10-25HP MARINER, MERCURY (MAGNUM, MARATHON, SEA PRO)

• Fits MARINER, MERCURY 10-25HP engines
• Compatible HP: 10HP, 15HP, 18HP, 20HP, 25HP
• Model types: MAGNUM, MARATHON, SEA PRO
• Covers 24 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

10HP Models

• 10HP MAGNUM (Mariner): 0D038000-0D279999, 9596000-9792199
• 10HP MARATHON (Mariner): 0D038000-0D279999, 9596000-9792199
• 10HP SEA PRO (Mercury): 0D038000-0D279999, 9596000-9792199

15HP Models

• 15HP OUTBOARD (Mariner): 0A197112-0D280999, 9542620-9792199
• 15HP OUTBOARD (Mercury): 0A197112-0D280999, 9542620-9792199

18HP Models

• 18HP OUTBOARD (Mariner): 6443973-0B238463, 7209533-0A730006, 9378151-9507380
• 18HP OUTBOARD (Mercury): 6443973-0B238463, 7209533-0A730006, 9378151-9507380

20HP Models

• 20HP OUTBOARD (Mariner): 6443973-0B238463, 7209533-0A730006, 9415101-9507380
• 20HP OUTBOARD (Mercury): 6443973-0B238463, 7209533-0A730006, 9415101-9507380

25HP Models

• 25HP OUTBOARD (Mariner): 6443973-0B238463
• 25HP OUTBOARD (Mercury): 6443973-0B238463

Need help finding your serial number? Check our serial number location guide for step-by-step instructions on locating it on your Mercury engine.

Verification & Support

Double-check compatibility for part 11099A1 using our parts finder tool. Still need assistance? No worries – contact us via the buttons at the bottom of this page (text, call, or email)

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