Sierra 18-2170 - Mercruiser Shift Arm Screw
Sierra 18-2170 - Mercruiser Shift Arm Screw
Sierra
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Sierra 18-2170 - Mercruiser Shift Arm Screw
When a Mercruiser shift-arm repair calls for Mercury 10-45590 or 10-8M0084649, Sierra 18-2170 provides a part-number-matched replacement screw. Identifying the specified fastener is more reliable than choosing a similar-looking screw, particularly where the drive's service information calls for a particular shift-arm component. Verify the reference against your installed drive before ordering.
Part Specifications
- Part Number: 18-2170
- Component: Shift arm screw
- Listed Application: Mercruiser shift arm; drive-specific fitment requires confirmation
- Replaces Mercury: 10-45590 and 10-8M0084649
For the corresponding Mercury reference item, see Mercury 10-8M0084649 screw; confirm the required reference for your drive when selecting either listing.
Confirm Fitment Before Ordering
Use the parts diagrams available on our website to locate the shift arm and identify its specified screw. Alternatively, send us your engine or drive model and serial number by email, text or live chat, and we'll confirm fitment before you order; include drive identification if the original assembly has been changed.
Additional Information
- Vendor: Sierra
- Part Number: 18-2170
- OEM Cross-Reference: Mercury 10-45590 and 10-8M0084649
Installation Notes
Refer to the applicable Mercruiser drive service manual for fastener placement, tightening requirements and the specified shift-system checks.
Frequently Asked Questions
Q: Which Mercury screw numbers does Sierra 18-2170 replace?
A: The listed replacement references are Mercury 10-45590 and 10-8M0084649.
Q: Is this the shift arm itself?
A: No. This listing identifies the shift arm screw, not a replacement arm, cable or complete shift assembly.
Q: Can I match it using thread size or length?
A: Those measurements are not supplied in this listing. Use the specified part number and drive parts diagram rather than assuming a general-purpose screw is equivalent.
Q: Does it fit every Mercruiser drive?
A: Universal drive coverage is not established. Confirm the screw reference for the actual drive model and serial number before ordering.
Q: What tightening specification should I use?
A: Use the applicable drive service manual's specification for this fastener; this listing does not establish a torque value or a thread-treatment requirement.
! 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.