805185A36 Aftermarket Mercruiser V8 Thunderbolt Distributor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement V8 Thunderbolt IV/V Complete Distributor - Replaces Part Number: 805185A36

New aftermarket complete distributor replacing MerCruiser 805185A36 for GM V8 engines with Thunderbolt IV/V ignition. The assembly uses the serviceable V8 Thunderbolt cap, rotor and distributor sensor families.

⚙️ Key Features

• Complete V8 Thunderbolt distributor assembly

• Supports Thunderbolt IV and Thunderbolt V ignition

• Marine distributor housing and shaft assembly

• Serviceable cap, rotor and ignition sensor

• Suitable for GM small-block and big-block V8 engines

🧰 Kit / Assembly Contents

• 1 × Complete distributor housing/shaft assembly - P/N 805185A36

• 1 × V8 Thunderbolt distributor cap - service family P/N 805759Q01

• 1 × V8 rotor assembly - service family P/N 13524T1

• 1 × Thunderbolt distributor sensor - service family P/N 87-892150Q02

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 805185A36 → Related service references 805185A6, A16, A26, A37 and A43

• 862057A4 and 90747A3/A21/A25/A27 (earlier/later related distributor references)

OEM / Related Numbers:

• 805185A6

• 805185A16

• 805185A26

• 805185A37

• 805185A43

• 862057A4

• 90747A3

• 90747A21

• 90747A25

• 90747A27

Aftermarket / Verified Equivalents:

• Sierra: 18-5470

• Recmar: REC805185A36

• Aftermarket Thunderbolt V8 distributor assemblies matched by gear and rotation

🚤 Compatibility

Commonly used on:

• MerCruiser GM V8 engines with Thunderbolt IV/V ignition

Typically suits:

• Engine / Equipment models:

• 5.0L/305 and 5.7L/350

• 7.4L/454 and 8.2L/502

• Carburetted and specified EFI V8 engines retaining the Thunderbolt distributor

• HP / Output Range: Approximately 198HP - 500HP

• Engine / System Type: GM V8 petrol marine engine with Thunderbolt distributor ignition

• Year Range: Principally 1980s-1990s; engine-serial dependent

• Serial / Component Identification: Confirm distributor rotation, drive gear, housing length and Thunderbolt connector.

🔌 Function

The distributor synchronises spark delivery with engine position and routes ignition energy to each cylinder. Depending on the system, it also contains the pickup sensor, ignition module, cap and rotor.

Common signs of failure / service requirement:

• No spark or intermittent ignition shutdown

• Unstable ignition timing or excessive timing scatter

• Distributor-shaft play, noise or reluctor contact

• Carbon tracking, cap/rotor burning or repeated misfire

• Corroded pickup, module or internal electrical connections

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging