Mercury MerCruiser Quicksilver Overflow Recovery Reservoir Cap 72058
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The Mercury MerCruiser Quicksilver 72058 Cap is an OEM replacement cap used with the overflow recovery reservoir on select MerCruiser diesel applications. This part is associated with the MerCruiser D7.3L D-Tronic 300, 1999 cooling recovery system.
Key Features
- Genuine Mercury MerCruiser / Quicksilver cap
- Part number: 72058
- Used on overflow recovery reservoir applications
- Fits select MerCruiser D7.3L D-Tronic 300 applications
- Application reference: 1999 MerCruiser Model D7.3L D-Tronic 300
- Superseded OEM references include 898101421 and 898101466
Engine Compatibility
Fits select MerCruiser diesel applications using the overflow recovery reservoir assembly, including:
- MerCruiser D7.3L D-Tronic 300 — 1999
Serial Number Fitment Notice
Confirm fitment by MerCruiser engine serial number and cooling-system parts diagram before ordering. Cooling recovery tank caps can vary by reservoir style and engine configuration.
When This Part Needs Replacement
Replace this cap if it is cracked, missing, leaking, no longer sealing properly, or if the overflow recovery reservoir is being serviced and the cap is damaged or worn.
Installation Notes
Inspect the reservoir neck and sealing surface before installation. Make sure the cap seats securely and that the overflow/recovery system is free of cracks or leaks.
Alternate/Superseded Part Numbers
- 72058
- 898101421
- 898101466
Parts Desk Insight
For this cap, the important match is the overflow recovery reservoir assembly, not just the word "cap." Use the MerCruiser D7.3L cooling-system diagram and serial number to confirm the reservoir style before ordering.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 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.