76681A1 96452A4 Mercury Trigger | Genuine Used Part

🔧 Product Description

Genuine Used Mercury Mariner Four-Cylinder Straight-Arm Trigger - Part Numbers: 76681A1 and 96452A4

A genuine pre-owned Mercury and Mariner four-cylinder trigger assembly used on selected 30 Jet and 40HP through 85HP two-stroke outboards.

Mercury 76681A1 supersedes to 96452A4 within the straight-linkage-arm trigger family. The assembly generates ignition-timing pulses and rotates mechanically as the throttle linkage advances the ignition timing.

⚙️ Key Features

• Genuine Mercury or Mariner used trigger

• Earlier OEM reference 76681A1

• Later service reference 96452A4

• Four-cylinder straight-arm configuration

• Suitable for selected 30 Jet through 85HP engines

• CDI and Sierra replacements available

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 73372A1 - Earlier trigger reference

• 73410A1 - Earlier trigger reference

• 76681A1 - Earlier OEM trigger

• 77000A2 - Related trigger reference

• 96452A1 - Later trigger reference

• 96452A4 - Later service assembly

• 96452A5 - Related later reference

OEM / Related Numbers:

• 76681A1

• 96452A4

• 73372A1

• 73410A1

• 77000A2

• 96452A1

• 96452A5

• Trigger Type: Four-Cylinder Straight Arm

Aftermarket / Verified Equivalents:

• CDI Electronics: 134-6452

• Sierra: 18-99390

• Aftermarket straight-arm trigger replacing 76681A1

• Aftermarket trigger replacing 96452A4 / 96452A5

🚤 Compatibility

Commonly used on selected:

• Mercury 30 Jet

• Mercury 40HP

• Mercury 40 Jet

• Mercury 45HP

• Mercury 50HP

• Mercury 55HP

• Mercury 75HP

• Mercury 80HP

• Mercury 80 Jet

• Mercury 85HP

• Compatible Mariner four-cylinder engines

Representative application period:

• Approximately 1976-1997, depending on horsepower and serial number

Important fitment note:

• This is the straight-arm trigger configuration.

• Engines requiring a hooked linkage arm use a different trigger family.

• Confirm the arm shape, wire colours and connector before ordering.

• Four-cylinder and three-cylinder Mercury triggers are not interchangeable.

🔌 Function

The trigger identifies crankshaft position and sends timed pulses to the switchbox.

Its movement under the flywheel changes ignition timing as the throttle linkage advances.

Common signs of failure:

• No spark on one or more cylinders

• Intermittent ignition

• Engine misfires under load

• Spark disappears when warm

• Engine will not reach maximum timing

• Trigger arm binds

• Wires crack near the rotating plate

• Peak trigger voltage is below specification

Recommended checks before installation:

• Confirm the straight-arm design

• Test each trigger circuit

• Inspect the switchbox and stator

• Check the flywheel key

• Confirm free trigger movement

• Route wires clear of the flywheel

• Set maximum timing after installation

📦 Condition

• Genuine Mercury or Mariner used part

• Pre-owned electrical component

• Wire and linkage wear may be present

• Electrical testing before installation is strongly recommended

• Supplied in protective or equivalent packaging