SIERRA MerCruiser Alpha Shift Arm Screw – 18-2170

Description

SIERRA MerCruiser Alpha Shift Arm Screw – 18-2170

Sierra 18-2170 is the retaining screw used with the MerCruiser Alpha-era shift arm in the bell-housing shift mechanism. It replaces MerCruiser 10-45590 and later 10-8M0084649 and is the related fastener for Sierra 18-2161 shift arm.

• Dedicated retaining screw for the MerCruiser shift arm.
• Crosses to MerCruiser 10-45590 and 10-8M0084649.
• Also cross-references GLM 21750.
• Related service component for Sierra 18-2161 shift arm with roller.
• Follow the specified torque/locking procedure so the shift arm remains secure without binding.

For marine drive and engine service parts, fitment can vary by model, serial number, gear ratio, casting and prior service history. Compare the original OEM number and physical configuration before installation, and replace related seals, bearings, locking hardware or cable components when their condition requires it.

Specifications

• Manufacturer: Sierra
• Part Number: 18-2170
• Application: MerCruiser MC-I/R/MR/Alpha-family shift-arm applications using OEM screw 10-45590 or 10-8M0084649.
• Part Type: Shift-arm retaining screw
• Application: MerCruiser Alpha-era shift linkage
• Related Sierra Part: 18-2161
• OEM Numbers: 10-45590, 10-8M0084649

Interchange / OEM References

• GLM: 21750
• MerCruiser Stern Drive: 10-45590, 10-8M0084649