Re: Electrical/Vacuum Schematic
2 - Yes, it grounds out one of the two ignition coils when it's activated. It's activated by high vaccum conditions, most notably reving the engine in neutral or otherwise without load. While on the subject, these engines are subject to run-away, where the engine turns up to incredible rpms all by itself if it's reved without a load. The vaccum cutout switch should help control that if it happens.<br /><br />1 - The wiring is a little strange. <br />One of the coil wires from the magneto plate up underneath the flywheel is tied to the center post on the vaccum cutout switch. Then a wire runs from that up to one of the two 'M' terminals on the boat's ignition switch.<br />The other post on the vaccum switch is connected to two places as well. One wire runs to the 'Saftey switch' which is the switch that is clicked off if your throttle is set too high. When it's clicked off, you will not be able to crank the engine. It should be on the aft starboard side of the engine, just below the magneto plate. If the switch isn't present, just ground out your wire.<br />The other wire that comes from the corner post on the vaccum cutout switch should run up to one of the two small terminals on the starter solenoid inside the boat. It should be white. If you draw out the circuit, you'll see that the starter solenoid's coil is grounded by the 'saftey switch' so it can activate.<br /><br />If you have no electric starter at all, your best bet would be to simply ground out the corner post on the vaccum cutout switch. You could connect the other ignition coil lead here if you wanted to, instead of grounding it.<br /><br />The other black wire coming from the other coil on the magneto plate should run through a knife disconnect up to the ignition switch in the boat, where it connects to the other 'M' terminal. When you turn the key to the STOP position, these two terminals are shorted together, which grounds the coils to each other, killing both sparks. In the CRANK and RUN positions, these two terminals are not connected to anything.<br /><br />Fortunetly, there's little that ever goes wrong with the vaccum cutout switch. Even if it does have a problem, it's usually something you can fix by disassembling and repairing the switch. All other parts are easily available from NAPA autoparts or Iboats, as well as your local Bombardier dealer. Better yet, as far as outboard parts go the ones for your engine are cheap.<br />I hope this explains it! Please ask for clarification if it doesn't!
