Just bought a 243 Explorer! Some questions

[Ed Wilson 0]

Hello, New to the forum, I just sold my 18 ft bayliner and upgraded to a 2007 Monterery 243 Explorer with the 350 MAG Mercruiser. Always wrenched and repaired my bayliner as needed. Having a couple issues with the new boat. Bought and hooked up a Vessel View yesterday and am getting the following faults-

1012-24 Engine or drive trim position- The input circuit for the sensor is above the valid limit

701-24 Level sensor tank A- The Input circuit for the sensor is above the valid limit

451-25 Pitit Pressure- The input circuit for the sensor is below the valid limit

 

So the boat is very clean and only has 234 hours - 1 owner and always on lift/lake use. When I test drove it after about 10 min i began to hear a slight misfire, popping coming from the motor. We pulled over and revved it up a few times and it kept wanting to stall out. We limped it back to his lift and he came down on the price, i bought it. Hoping its a small tune up or bad gas. Took it home last weekend, cleaned and waxed it and siphoned all the old gas out. It was super dark yellow and smelled foul. Filled it up with premium/ added lucas ethonal and injector cleaner and took it on a drive last night. Again it started great seemed to idle up and down and the longer it ran it smoothed out more. As i was sitting there moored to the dock i did hear what sounded like water going down a gutter. Not sure if the U-joint bellow is leaking?? there was a small amount of water but nothing major in the hull- i did notice on the test drive there seemed to be a some water sprayed up by the plug wires/ distrib area when we opened the engine cover when it was running rough. Anyways, we went out for drive, it ran good and would accelerate quick. Heard what sounded like to be popping/misfire about 15 min into the drive. Then is smoothed out and we kept driving, burned about 6 gallons of gas. By the time we went into the ramp, it was back to not wanting to idle and stalling out. Do the current codes have any effect on the issues described? Any recommendations?

Thanks!