Wire Set→V6→Thunderbolt Ignition

Part # & Price	Description
SMI98111 $36.95	Wire Set Ignition Spark Plug for Mercruiser V6 4.3L Thunderbolt 84-816761A16 Fits Mercruiser V6 4.3L 262 Cubic Inch Engines with Mercruiser Thunderbolt Ignition. Thunderbolt ignition can be identified by having male studs sticking out of the top of the distributor cap and having a round ignition coil and usually has an ignition box mounted on the port side exhaust riser. If you have a short square coil then you have Delco EST ignition and this is not the correct wire set. Replaces Mercruiser: 84-816761A16