Quicksilver 866148 TKS Enrichment Solenoid Module

The Quicksilver 866148 is a genuine OEM enrichment solenoid module designed for MerCruiser carbureted marine engines equipped with the TKS (Turn Key Start) system. This critical component controls fuel enrichment during cold starts, eliminating the need for manual choke operation and providing reliable turn-key starting performance.

Key Features:

• Genuine Mercury/Quicksilver OEM part - ensures proper fit and function
• Electrothermal solenoid design with extending brass plunger
• Controls enrichment passage in carburetor based on engine temperature
• Provides additional fuel/air mixture for cold starts, then automatically closes after 6-10 minutes
• Compatible with MerCruiser 3.0L, 3.0L TKS, 4.3L, 5.0L, and 5.7L carbureted engines
• Also known as MPN 3310-866148

The TKS enrichment module works by keeping an enrichment passage open during cold starts to deliver additional fuel to the engine. As the module warms up from electrical current, the brass plunger extends to block the enrichment passage, allowing the carburetor to function like a standard unit once the engine reaches operating temperature. This module is a common service replacement part for engines experiencing hard starting, rough idle, or stalling issues related to improper fuel enrichment.