I'm having an intermittent problem. After running at speed for 20 minutes or so the engine will start struggling, reving some and losing speed. If I drop back to neutral and let the boat drop off a plane, it (usually) will then run fine for a while again. A few times it has still struggled after dropping back to an idle. Other times, it runs fine much longer.

Plugs, plug wires, distributor cap, rotor button, and fuel filter are new this season.

Things I'm thinking to check are the fuel pump and ignition coil.

I know to check the fuel pump that I can check the fuel rail pressure. Is there any way to test the ignition coil?

Anything else I should check?

Thanks!



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