Thunderbolt Iv Ignition Wiring Diagram

Thunderbolt iv wiring diagram. Thunderbolt v was an improvement on an already exceptionally reliable and well performing system. Mercruiser introduced the thunderbolt iv onto their engines in 1982 alongside the introduction of the 1 r drives.

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Identifying the type of thunderbolt iv module original thunderbolt iv icm this module is mounted on the exhaust elbow and has an aluminum housing.

Thunderbolt iv ignition wiring diagram. Brown in mercruiser category on nov 12 you can also find other images like wiring diagram parts diagram replacement parts electrical diagram repair manuals engine diagram engine scheme wiring mercruiser thunderbolt iv no power to coil page. Gray neg on coil to tac. How do i troubleshoot my thunderbolt ignition. Adapter harness 15275a1 is no longer available from the manufacturer.

Basically it has a magnetic field from a constant dc current thru it supplied by the icm. This is a complete working ignition system that was removed from a gm v 8 engine with the thunderbolt 4 ignition system. Mercruiser thunderbolt ignition systems. Do not use a test light.

1 iboats. The tb iv system was used until the introduction of tb v mid way through 1996. The amplifier itself is grounded and on yours is usually on one of the mounting bolts for the amplifier itself where it mounts to the elbow. Reply 08 06 2002 11 02 pm.

Wiring harness in the t bolt iv. Here is the youtube location to where the system is being offered for sale. Testing thunderbolt iv hei ignition system. Wht grn from module to dis.

Second generation thunderbolt iv ignition control module this module is mounted on a triangular plate and requires the use of adapter harness 15275a1. Mercruiser thunderbolt ignition wiring diagram this is images about mercruiser thunderbolt ignition wiring diagram posted by peggy g. Thunderbolt iv ignition wiring diagram wiring diagram is a simplified standard pictorial representation of an electrical circuit it shows the components of the circuit as simplified shapes and the capacity and signal connections between the devices. Thunderbolt iv wiring question no there isn t any ground wire from the distributor to ground the housing is the ground that is done by clamping down the distributor not with a wire.

Mercury marine service bulletin 92 11. The distributor rotor turns a metal disk with fingers on it which go thru a gap in the sensor. Thunderbolt iv mounted on exhaust elbow wht red from module to dis. Coil from module and kill switch ignition.

The sensor uses a hall effect sensor. Use a voltmeter when making these tests.