6413A1 Mercury Bearing Housing | Genuine Used Part
6413A1 Mercury Bearing Housing | Genuine Used Part
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🔧 Product Description
Genuine Mercury Upper Crankshaft Bearing Housing Assembly - Part Number: 6413A1
A genuine Mercury upper crankshaft bearing housing and powerhead end-cap assembly for selected 7.5HP and 9.8HP two-cylinder outboards.
The housing supports and locates the upper crankshaft bearing while retaining the associated oil seal, O-ring and bearing components at the top of the crankcase.
The casting and assembly may also be identified by the formatted Mercury number 1164-6413A1.
⚙️ Key Features
- Genuine Mercury OEM upper bearing housing
- Correct assembly part number 6413A1
- Formatted Mercury reference 1164-6413A1
- Replaces earlier bearing housings 6110A1 and 5279A1
- Used on selected 7.5HP and 9.8HP twin-cylinder outboards
🚤 Compatibility
Commonly used on
- Mercury and Mariner twin-cylinder powerhead upper-bearing assemblies
- 7.5HP and 9.8HP crankcase end-cap applications
Typically suits
- Engine models:
- Mercury 7.5HP two-cylinder outboard
- Mariner 7.5HP two-cylinder outboard
- Mercury 9.8HP two-cylinder outboard
- Mariner 9.8HP two-cylinder outboard
- Mercury 9.8HP - serial 9165303 to 9217755
- Mercury 9.8HP - serial 9217756 and above
- Powerheads previously using bearing housing 5279A1 or 6110A1
- HP Range: 7.5HP - 9.8HP
- Engine Type: Mercury / Mariner twin-cylinder carburetted two-stroke outboard
- Year Range: Approximately late 1960s - mid-1980s
🔌 Function
The housing locates the upper crankshaft bearing, controls crankshaft alignment and seals the upper end of the crankcase.
⚠️ Common Signs of Failure
- Bearing bore worn or loose
- Housing cracked around the mounting holes
- Upper crankshaft oil leakage
- Excessive crankshaft movement or vibration
- Corrosion around the seal or bearing seat
🔄 Supersession & Cross Reference
OEM Supersession Chain
- 6413A1 → Supersedes 6110A1
- 6413A1 → Also replaces 5279A1
- 6110A1 and 5279A1 earlier upper-bearing housing references
OEM / Related Numbers
- 6413A1
- 1164-6413A1
- 11646413A1
- 6110A1
- 5279A1
- 30-72961 related upper crankshaft bearing
- 30-20861 earlier bearing reference
- 31-31410 related bearing roller
- 26-66301 related upper oil seal
- 25-20863 related housing O-ring
- 15-31412A1 related bearing shim set
Aftermarket / Verified Equivalents
- No aftermarket equivalent
📦 Condition
- Genuine used part
- Removed from running engine where applicable
- In good working condition unless otherwise stated
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day returns — if it's not right or you ordered the wrong part, tell us within 14 days of delivery and send it back in the condition you received it (return freight is at your cost; fitted parts can't be returned). Used parts are sale items, so a return may be limited to store credit. Full details in our Refunds & Returns policy.
What you get with this used part
What you get with this used part
- A genuine part removed from an engine, drive or jet ski dismantled in our Kadina workshop, inspected before listing. The photos show the actual part on our shelf.
- A 14-day return period if it is not right or you ordered the wrong part.
- Used gearboxes are pressure-tested before dispatch and carry a 30-day repair warranty. Propellers are sold as-is and priced accordingly.
- Not sure it fits? Send us your engine model and serial number or call 0412 532 984 and we will check before you buy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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