Smart boaters fix it right the first time. This factory **SCREW, (.437-14 x 1.75), Trim Tab to Gear Housing** ensures professional results even for DIY installation – we’ll help verify it’s the right part.

Built to Mercury’s exacting factory standards, this gear assembly ensures reliable operation across all engine RPM ranges. Part number 66024 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 66024 saves you money long-term by lasting years instead of months. Factory precision means perfect installation – no modifications, no surprises.

FITS: 115-140HP MARINER, MERCURY

• Fits MARINER, MERCURY 115-140HP engines
• Compatible HP: 115HP, 140HP
• Covers 24 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

115HP Models

• 115HP OUTBOARD (Mariner): 4865178-5430526, 5430527-5738890, 5738891-6436122, 7191308-7208847, 8057045-8062459, 8062460-8062634
• 115HP OUTBOARD (Mercury): 5314656-5600966, 5600967-6436122, 7131213-7147987, 7147988-7208847, 8061120-8061269, 3525441-4855152, 7010763-7112248, 8008665-8051949, 4855153-5314655, 7112248-7131212, 8051950-8061119

140HP Models

• 140HP OUTBOARD (Mariner): 5088444-5443029
• 140HP OUTBOARD (Mercury): 5327663-5625107

Looking for your engine serial number? Our helpful guide shows you exactly where Mercury places serial numbers on different models.

Verify part 66024 works with your Mercury using our parts finder tool. Have questions? Reach out using the contact buttons at the bottom of this page – our team is here to help by text, call, or email.

Over 40 years helping Mercury owners. Save up to 20% below retail on factory Mercury Marine parts.