Mercury Quicksilver Stator 878143T05 | OEM Outboard Ignition Charging
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Mercury Quicksilver Stator 878143T05
Part Number: 878143T05 | Also listed as: 398-878143T05
Brand: Mercury / Quicksilver
Official Product Type: Stator — Outboard Ignition & Charging System
System: Ignition / Charging
Aftermarket cross-reference: CDI Electronics replaces 1748778K1 (see related parts below)
A genuine OEM Mercury stator assembly for applicable Mercury outboard engines. The stator is a key component of the engine's ignition and battery charging system — it generates AC current as the flywheel rotates, powering the ignition system and charging the battery. A failed stator typically results in no-spark conditions, intermittent ignition, or loss of battery charging.
Compatible Applications
- Mercury outboard engines — verify by part number 878143T05 / 398-878143T05
- Confirm fitment against your engine's serial number, model year, and Mercury parts diagram before ordering
- Stator fitment is highly serial-number and production-range specific — HP rating alone is not sufficient to confirm compatibility
Mercury parts diagrams are the authoritative source for stator fitment. If you have your engine's serial number, contact us to help confirm the correct part before ordering.
Part Details
- Component type: Stator (ignition/charging)
- OEM status: Genuine Mercury / Quicksilver — not aftermarket
- System: Flywheel magneto ignition and battery charging
- Diagram position: Located under the flywheel — confirm position in the Mercury ignition/electrical diagram for your specific engine
Symptoms of a Failed Stator
- Engine cranks but will not start (no spark)
- Intermittent spark or misfiring under load
- Battery not charging while engine is running
- Erratic tachometer readings
Service & Replacement Notes
- Flywheel removal is required to access and replace the stator — use the correct flywheel puller for your engine.
- Inspect the trigger/timer base and rectifier/regulator at the same time — these components work together and often fail together.
- Check all stator wiring and connectors for corrosion or chafing before condemning the stator itself.
- Follow the Mercury service manual for torque specs and wiring reconnection.
- After installation, verify spark on all cylinders and confirm battery charging voltage at the battery terminals.
Parts Desk Insights
Best use case: This is the correct OEM stator for customers who have confirmed 878143T05 against their Mercury parts diagram or who have been directed to this part number by a Mercury dealer or service manual. It is the right choice when an OEM replacement is required and the part number has been verified by serial number.
Common mistakes: Stators are among the most serial-number-sensitive parts in the Mercury catalog — the same engine family can use several different stators depending on production date and output rating. Do not order based on horsepower or model name alone. Always cross-reference the engine serial number against the Mercury parts diagram. Also note that a failed rectifier/regulator can damage a new stator if not replaced at the same time — recommend inspecting the rectifier before or during installation.
Related Parts
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.