Review on 🔌 Kemimoto Ignition Coil Replacement | Mercury Marine 300-8M0077471, 339-879984A1, 300-879984T01, 339-879984T00 by Joshua Ngo

Bought 4 to replace normal coils. Product fits exactly like an OEM part with correct wiring and harness attachment. Installed on 07 Mercury 50hp EFI. The original coils lasted over 200 hours, these less than 2 hours. The engine was started 4 times with coil replacement. Once when installed in the entrance, the second was a trial run on the water for 30 minutes. The third was a few months later for a 45 minute drive. Last weekend everything started well, ran well for ten minutes and then the problems started. After testing, 2 out of 4 coils purchased showed failures in the manufacturer's resistance test. waste of time and money.