Mercury Outboard Switch Box Troubleshooting

Check the voltage on the red and white Ignition wires at the CD Unit. In this video im explaining how the mercurymariner cdi powerpack switchbox etc works in lay mans termsThe hierarchy of spark is like so The INCOMING.

Mercury Outboard Switch Box Bench Test Youtube

Over sufficient time mineral accumulation from water intrusion and evaporation can cause an intermittent bridge between the two switches.

Mercury outboard switch box troubleshooting. Check the voltage on the red and white Ignition wires at the CD Unit. You should have a. When I test the readings are OPPOSITE and still not the right number anyway.

Disconnect the Mercury Outboard switch and reset if the engine fires replace the Mercury Outboard switch. A video on how to diagnose and replace a bad switch box for any older outboard motor. Decided to check the switch box.

This short video shows an outboard Force by Mercury Marine with the power pack replaced. Mercury Outboard Switch Box Troubleshooting Seloc Mercury Outboards 1965-89 Repair Manual-Joan Coles 1998 Outboard Motor Service Manual. Also a little bonus footage of a nice James river blue catfish caught b.

Motor has been running very rough wont idle right dies when you try to throttle up in gear. For example in the second and third pics Im testing the green terminal. No Fire on One Cylinder.

I set the ohm meter to 1K as directed. If the voltage is less than 9 12 volts during cranking there is a problem in the battery s or the Ignition switch Box. CDI Electronics Outboard Motor Parts Ignitions.

Mercury Outboard Switch Box Failures The OB ignition switch is a double pole switch one side handling the 12V circuit the other the simple openclose of the ground-to-kill ignition. LOLLot of good info and discussion about the switch boxes and idle stabilizer functions. For more details watch CleanCarburetor movie How to test power pack.

If the voltage is less than 9 12 volts during cranking there is a problem in the battery s or the Ignition switch Box. Mercury Mariner switchbox problems Mercury switch box replacement troubleshoot Mariner switchboxes Mercury Mariner ignition components. Mercury Mariner ignition module diagrams switch box replacement parts and repair manuals.

I currently am chasing the most probable cause Switch Box failures on a Mercury 175 HP outboardI have a 1980 Mercury Marine 175HP V6 outboard SN 5489172 which suffered two Switch Box failures within a couple trips out on the water recently. Check the reading on the switch box terminal AND on the ignition coil terminal. Disconnect the Mercury Outboard switch and reset if the engine fires replace the Mercury Outboard switch.

This is one way to bench test a switch box and you also can do this on the outboard motor. Motors below 30 hp- 1979 Practical Outboard Ignition Troubleshooting-CDI Electronics Incorporated 2009-08-05 Comprehensive troubleshooting guide for most outboard marine engines. Check the DVA output on the green wires from the switch box while connected to the ignition coils.

So the first pic is what the manual says the ohm readings should be.

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