Mercury Marine Fuse Assembly 55 Amp 79023T56
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Mercury Marine Quicksilver 79023T56 is a genuine OEM 55 amp fuse assembly used in select Mercury and MerCruiser high-current electrical systems. It is commonly used in select Verado power steering electrical systems and various MerCruiser starting system applications where Mercury specifies a 55A fuse assembly. This part helps protect critical electrical circuits from overload and should be matched by exact parts diagram and circuit requirement.
Key Features
- Genuine Mercury Marine / Quicksilver OEM electrical component.
- Part number 79023T56.
- Full OEM-style reference: 88-79023T56.
- 55 amp fuse assembly.
- Used for high-current circuit protection.
- Commonly associated with select Verado power steering electrical systems.
- Commonly associated with various MerCruiser starting system applications.
- Mounting hole reference: 13/32" / 10 mm.
- Stud thread reference commonly listed as 1/4-28.
- OEM assembly designed to match Mercury electrical system requirements.
- Should be matched by part number, amperage, mounting style, and diagram callout.
Engine Compatibility
This is an electrical-system service part, not a universal engine-size part. The strongest supportable fitment is by exact Mercury / MerCruiser engine serial number, electrical harness diagram, and fuse location.
Commonly associated applications include:
- Select Mercury Verado power steering systems
- Select Mercury outboard high-current electrical circuits
- Select MerCruiser starting system applications
- Mercury / MerCruiser electrical layouts where 79023T56 / 88-79023T56 is specified
Because fuse assemblies vary by amperage, terminal style, mounting hole, harness location, and circuit function, the correct diagram should be confirmed before ordering.
Serial Number Fitment Notice
Verify fitment by exact engine serial number and the correct Mercury electrical / starter / power steering / fuse assembly parts diagram before ordering. A fuse assembly with the same amperage may not have the same terminal, mounting, lead, or harness configuration.
When This Part Needs Replacement
Replace this fuse assembly when the original fuse is blown, heat-damaged, corroded, cracked, loose, or no longer provides reliable circuit protection. If the fuse has failed, the underlying electrical fault should be diagnosed before installing the replacement.
Installation Notes
Disconnect battery power before servicing high-current electrical components. Confirm the correct fuse location, inspect the surrounding wiring and terminals for heat damage or corrosion, and repair any electrical fault before installing the new fuse assembly. Use the correct OEM amperage only; never bypass the fuse or substitute a higher-rated part.
Alternate / Superseded Part Numbers
Active OEM reference:
- 79023T56
- 88-79023T56
Related superseded / earlier OEM references:
- 79023A55
- 88-79023A55
- 79023A56
- 88-79023A56
Parts Desk Insight
The important check with this fuse assembly is why the original fuse failed. Replacing the fuse can restore power, but a repeated failure usually points to a wiring, starter, charging, trim, or power steering circuit issue that should be corrected before the boat goes back into service.
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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.