I'm having an intermittent issue with the float switch in the engine mounted oil tank. On 3 occasions the switch has not cut off the transfer pump causing the tank to overfill and dump the excess oil into the airbox (like it's suppose to) thus causing a reduction in power, high oil consumption and making the Starboard engine work harder, use more fuel & oil to stay on plane. Stopping the boat and unplugging the switch harness will stop the flow and the problem goes away for a while. I have removed the switch, cleaned it and looked for obvious issues. Don't see any. Before I spend $160 for a float switch should I look at anything else? Thanks in advance. Brooks