Thunderbolt IV V-6 Distributor 

Key Features:

• Battery Powered (HEI) High Energy Ignition
• Uses a Hall-Effect type sensor to trigger ignition accurately even at extremely low RPM
• Designed as a direct replacement for Mercury Thunderbolt IV Ignition Distributors
• Meets or Exceeds SAE J1171 Standards

Additional Details:

• Fits: GM V-6 Engines w/Thunderbolt IV & V Ignition

Use With:

• 18-5274: Tune Up Kit

Interchanges/Replaces

Mercruiser Stern Drive

• 805185A15
• 805185A27
• 805185A37
• 805185A45
• 805185A5
• 90747A15
• 90747A26
• 90747A28
• 90747A8

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-5116-1	CDI E11-0005 GLM 73110 Mallory 9-29804 Mercruiser Stern Drive 87-861780A2 87-861780A4 87-861780Q4 87-892150A02 87-892150Q02 87-91019A2 87-91019A3 87-91019A6	1	Ignition Sensor		N/A
18-5432	CDI E65-0004 GLM 71070 Mallory 9-29218 Mercruiser Stern Drive 13524A4 13524A6 13524Q06 19405A4 90576A5	1	Rotor Assembly		N/A
18-5396	CDI E64-0013 GLM 71500 Mallory 9-29400 Mercruiser Stern Drive 11108A3 13753A2 815407A2	1	Distributor Cap		N/A