Sierra Ignition Rotor AP-866 SIE-18-5407
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Sierra SIE-18-5407 is an ignition rotor identified as AP-866 for marine V8 applications using Prestolite distributors with clip-down distributor caps. Current listings consistently describe it as the Prestolite V8 clip-down style rotor used across selected MerCruiser, OMC, Chrysler, Crusader, Pleasurecraft, and Chris-Craft applications.
Key Features
- Ignition rotor
- Sierra part number: 18-5407
- AP-866 application reference
- Prestolite V8 clip-down distributor style
- Used with Sierra distributor cap 18-5369
- Marine replacement tune-up component for selected V8 ignition systems
Engine Compatibility
Common aftermarket references tie Sierra 18-5407 to V8 marine engines using Prestolite distributors with clip-down caps. Public cross-reference sources connect it to selected MerCruiser stern drive, OMC stern drive and inboard, Chrysler inboard, Crusader, Pleasurecraft, and some Chris-Craft applications. Because rotor fitment is distributor-specific, fitment should be confirmed by engine model, distributor type, and cap style before ordering.
Serial Number Fitment Notice
Fitment should be confirmed by engine model, serial number, and installed distributor type before ordering. The safest match is by the original rotor number and Prestolite clip-down cap setup, not by engine family alone.
When This Part Needs Replacement
Replace when the rotor shows burning, carbon tracking, corrosion, cracking, looseness, or visible contact wear, or when ignition service reveals weak or inconsistent spark transfer. Rotor condition directly affects spark delivery and ignition reliability.
Installation Notes
Install only on the correct Prestolite V8 clip-down distributor application. Confirm the replacement matches the removed rotor exactly before installation, and inspect the distributor cap at the same time. Current sources consistently note this rotor is used with Sierra cap 18-5369.
Alternate / Superseded Part Numbers
- AP-866
- 18-5407
- MerCruiser 392-6326
- MerCruiser 392-6326T
- MerCruiser FI6900044
- OMC 980892
- Chrysler 1658535
- Crusader 41059
- Pleasurecraft R103003
- Mallory 9-29201
- GLM 71050
- CDI E65-0011
Parts Desk Insight
The key match point on SIE-18-5407 is the distributor style. This rotor is consistently described as the Prestolite V8 clip-down version, so confirming that the engine uses the clip-retained cap and 18-5369 cap family is the quickest way to avoid mixing it up with similar-looking marine rotors.
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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.