Mercury MerCruiser Quicksilver Gear Housing Shim Set 8M0063267
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Mercury Quicksilver Gear Housing Shim Set – Roller Bearing to Gear Housing
Part Number: 8M0063267 (15-8M0063267)
Brand: Mercury / Quicksilver
GTIN: 745061897403
Product Overview
A genuine OEM roller-bearing-to-gear-housing shim set used during assembly or overhaul of selected Mercury outboard lower units. These shims establish the correct bearing and pinion-gear position relationship within the gearcase. Shim range shown in applicable diagrams: .006–.048 in. Quantity required varies based on the specific gearcase setup measurement.
Compatible Applications
- Mercury V-115 DFI / OptiMax 2.5L
- Mercury V-135
- Mercury V-175 DFI / OptiMax 2.5L
- Mercury Magnum II
- Mercury Magnum III
- Selected Mercury 140 Jet gearcase assemblies
- Additional Mercury V6 outboard gear housings using the same roller-bearing and pinion setup
Fitment Note: Fitment is gearcase- and serial-number-specific. Engine horsepower alone is not sufficient to confirm compatibility. Always match the engine serial number and gear-housing parts diagram before ordering.
When This Part Is Needed
- Rebuilding or overhauling the lower unit gearcase
- Replacing the driveshaft bearing or gear housing
- Existing shim stack is damaged, lost, or out of specification
Installation Notes
- Correct shim selection is a precision gearcase procedure — do not assume the old shim stack thickness is correct
- Measure and set bearing and pinion position per the applicable Mercury service manual
- Improper shimming affects gear alignment, bearing loading, and lower-unit durability
Superseded Part Numbers
- 42637A1
- 8M0053110 (selected later gearcase assemblies)
Related Parts
- Quicksilver Needle Roller Bearing 30956T
- Mercury MerCruiser Pinion Nut 11-35921
- Mercury Quicksilver Driveshaft Oil Seal 26-804156
- Mercury Outboard Propeller Shaft Oil Seal 8M0205729
- Mercury Quicksilver Lower Unit Seal Kit 26-33144A2
Parts Desk Insights
This shim set is a precision setup component, not a general hardware item. The most common issue is customers ordering by horsepower alone — fitment requires matching the specific gearcase assembly and serial number to the correct diagram. The required shim thickness must be measured during assembly, not copied from the old shim stack. If you’re rebuilding a lower unit and aren’t sure which shims apply, reference your Mercury service manual or contact us with your serial number before ordering.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.