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- GLM HEI Distributor Assembly for Mercruiser GM V8 5.7L Thunderbolt
GLM HEI Distributor Assembly for Mercruiser GM V8 5.7L Thunderbolt
Product Code: GLM71230
The GLM71230 HEI distributor assembly is designed as a direct replacement for Mercury Thunderbolt IV/V distributors on GM V8 5.7L MerCruiser engines. It provides reliable, high-energy ignition performance for improved starting, throttle response, and offshore reliability.
- Battery powered (HEI) high energy ignition
- Uses a Hall-Effect type sensor for accurate ignition triggering, even at low RPM
- Meets or exceeds SAE J1171 standards
- Replaces Mercury 805185A43
- Cross-references: SIERRA 18-5470 / GLM 71250
Fits: GM V-8 engines with Thunderbolt IV & V ignition