CDI 423-6349 - OMC Engine Adapter Harness (Sierra 18-99402)
CDI 423-6349 - OMC Engine Adapter Harness (Sierra 18-99402)
Sierra
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CDI 423-6349 — OMC Engine Adapter Harness
CDI Electronics 423-6349 is an OMC engine adapter harness, now sold under Sierra part number 18-99402. Having the correct adapter harness on hand simplifies wiring connections and helps avoid a mismatched or improvised splice. Replaces OMC 176349.
Part Specifications
- CDI Part Number: 423-6349
- Current Sierra Part Number: 18-99402
- Type: OMC engine adapter harness
- Replaces: OMC 176349
Confirm Fitment Before Ordering
Not sure this is the correct adapter harness for your engine? You can check the parts diagrams available on our website to help identify the correct part. Or, give us your engine model and serial number and we'll confirm it for you before you order — by email, text, or live chat.
Additional Information
- Vendor: CDI Electronics / Sierra
- Part Number: 423-6349 (current Sierra number 18-99402)
- OEM Cross-Reference: Replaces OMC 176349
A related CDI 423-6344 / Sierra 18-99401 OMC adapter harness is also available if your engine uses that connector configuration instead.
Installation Notes
Install following the applicable OMC engine wiring service manual for your model.
Frequently Asked Questions
Q: How do I confirm this harness fits my engine?
A: Send us your engine model and serial number and we'll confirm 423-6349 (Sierra 18-99402) is the correct adapter harness for your engine — by email, text, or live chat.
Q: Is this the same part as Sierra 18-99402?
A: Yes, CDI 423-6349 is now sold under Sierra part number 18-99402.
Q: Does this replace OMC 176349 directly?
A: Yes, this adapter harness is a direct replacement for OMC 176349.
Q: What does this adapter harness do?
A: It provides the correct wiring connection between your OMC engine and its ignition or wiring harness, avoiding the need for a custom splice.
Q: Is there a similar harness for a different connector configuration?
A: Yes, CDI 423-6344 (Sierra 18-99401) is a related adapter harness available if your engine uses that configuration instead.
! Compatibility references are provided for informational purposes only and do not constitute a fitment guarantee. Part numbers, application listings, and "replaces" cross-references are based on manufacturer data and are intended as a starting point for identification — not a guarantee of fit for your specific engine, hull, or installation.
Buyer is solely responsible for verifying compatibility with their engine model, serial number, model year, and trim configuration before purchase. If you are unsure whether this part fits your application, contact MacombMarineParts.com before you buy — we're available via text, email, or online chat to help verify compatibility for your specific application.
MacombMarineParts.com is not liable for parts ordered based on assumed fitment. Returns due to buyer-selected incorrect fitment are subject to our standard return and restocking fee policies.