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MERCURY 30/40 EFI 4 Stroke Problem Fault with fuse Nr 4

Znord737

New member
Engine runs for 10-15 minutes ok then suddenly concks out

Fuse Block Fuse Nr 4 the one that provides power to Ignition coil heats up slowly over 10 to 15 minutes when the engine is running then melts completely.

The engine runs perfectly, no miss fires.

All the coil packs were replaced 8 months ago with brand new ones .

I am making an assumption that it is a coil pack causing this malfunction but how to determine which one is my problem ? re-inserting a 20 Amp fuse the engine starts again and runs ok for 10 to 15 mins then the fuse melts and engine stops.

Could it be any other problem other than one of the coil packs?

Any pointers/advice would be very much appreciated

Znord737
 
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