Experiencing engine hesitation or reduced power? This authentic Mercury Marine KNOB solves the problem with factory precision – no guessing, no compromises.

Designed and manufactured to Mercury Marine OEM standards, this component ensures reliable operation across all engine RPM ranges. Part number 53189 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.

Factory parts exist for a reason — they work. Part 53189 undergoes rigorous Mercury Marine quality testing that aftermarket manufacturers skip. The result? Reliable performance season after season.

Compatible Mercury Marine Engines

FITS: 4-45HP MERCURY

• Fits MERCURY 4-45HP engines
• Compatible HP: 4HP, 39HP, 40HP, 45HP
• Covers 18 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

4HP Models

• 4HP OUTBOARD (Mercury)

39HP Models

• 39HP OUTBOARD (Mercury): 1655013-2498135

40HP Models

• 40HP OUTBOARD (Mercury): 2498136-3296136, 3296137-4107219, 3305152-7045757, 3306257-8026539, 9000306-90721718

45HP Models

• 45HP OUTBOARD (Mercury): 4107220-5595531, 7045758-7147237, 8026540-8068064, 9072179-9258280

Not sure where to find your engine’s serial number? View our quick reference guide to locate it on your Mercury Marine engine.

Verification & Support

Want to verify compatibility for part 53189? Use our parts finder tool for instant confirmation. Still have questions? No problem – use the contact buttons at the bottom of this page to reach us by text, call, or email

Four decades of marine parts experience. Great prices, quick delivery – your parts ship fast.