Mercury MerCruiser Quicksilver — Alternator Mounting Screw .375-24 × 4.250 in. — 37626
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Mercury MerCruiser Quicksilver Alternator Mounting Screw 37626 | 3/8-24 × 4-1/4 in.
The Mercury MerCruiser Quicksilver 37626 is a genuine OEM 3/8-24 × 4.250 in. alternator mounting screw that secures the alternator to its mounting bracket on select MerCruiser engines. Mercury diagrams show it passing through the alternator and bracket assembly with the specified washers, spacer and retaining nut.
Key Features
- Genuine Mercury Marine OEM fastener
- Part number: 37626
- Full service number: 10-37626
- Thread: 3/8-24 UNF
- Length: 4.250 in. / 107.95 mm
- Application: Alternator-to-bracket mounting
- GTIN: 745061139732
- Typical quantity: 1 per assembly
Compatible Applications
- Select MerCruiser 3.0L / 181 CID inline-four engines using the applicable alternator and mounting-bracket arrangement
- Older 3.0L starter and alternator assemblies
- Later 3.0L / 3.0LX Alpha configurations
Serial Number Fitment Notice
Confirm the engine serial number and alternator diagram before ordering. MerCruiser changed alternators and mounting hardware across 3.0L production, so match the 3/8-24 thread and 4-1/4 in. length to OEM number 37626.
When This Part Needs Replacement
Replace the screw if the threads or head are damaged, corrosion is severe, or the fastener is bent or worn. Inspect the spacer, washers and retaining nut at the same time.
Installation Notes
Applicable assemblies pair 37626 with:
- 28105 — alternator screw washer
- 20553 — alternator-to-bracket washer
- 63894 — spacer/bushing
- 23161 — 3/8-24 retaining nut
Install in the original alternator pivot position and tighten to the applicable MerCruiser service specification.
Related Parts
- 16738A1 — alternator bracket
Alternate & Superseded Part Numbers
- 37626 — OEM part number
- 10-37626 — full Mercury service number
- No superseding part number
Technical FAQ
What size is this screw?
3/8-24 UNF fine thread, 4.250 in. (107.95 mm) long.
Is 37626 the same as 10-37626?
Yes. 10-37626 is the full Mercury service number for the same part.
Is this the adjustment-brace screw?
No. This is the long alternator pivot screw. Adjustment-brace fasteners are shorter.
Parts Desk Insights
Best use: Replacing a damaged or corroded alternator pivot screw on a MerCruiser 3.0L assembly that calls for 37626.
Most common mistake: Ordering a shorter adjustment-brace fastener or a coarse-thread 3/8-16 screw instead of the long 3/8-24 fine-thread pivot screw.
Sizing and fitment: Match both the 3/8-24 thread and the 4.250 in. length, and confirm your engine serial number against the alternator diagram. If you are servicing the full pivot stack, check the washers, spacer and retaining nut listed above at the same time.
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.