Testing your boats fuel system.....

[powbmps]

Other than the two main grounds on the motor, is there anywhere else I should be looking? Disassembled both, cleaned up connections and put them back together.

Right side of the motor. Large wire is directly from the battery. There are two smaller wires as well, one from the fuel pump, and one from the fuel sender.

http://i1218.photobucket.com/albums/dd415/powbmps/20160929_144120.jpg

Left side of the motor. Larger wire comes from the wiring harness (alternator and what else?). Smaller wire comes from the distributor sensor.

http://i1218.photobucket.com/albums/dd415/powbmps/20160929_153604.jpg

 

[alldodge]

They look clean but shouldn't be in that order. The bolt and lock washer are screwed into the bell housing and tightened securely. Next the wires are placed on the post, washer then nut and tightened. The way it is now the lug is next to the bell housing, and that shouldn't happen. Copper cannot take the torque.

Check your meter again. I see the voltage setting but don't see a AC/DC position other then 500 and 200 volt setting. Is there different terminals for AC/DC?

 

[powbmps]

I will switch the wires back. It looks like this:

http://i1218.photobucket.com/albums/dd415/powbmps/20160929_172820.jpg

 

[alldodge]

Just looked up the meter on line so you had it in the correct setting. With the meter displaying a moving reading on DC and even after the ALT was replaced it still doing it, then it might be the meter, or you had a bad ground. You wasn't measuring from the + side of the coil to the - side of the coil? If it was done that way, then this would explain the reading

 

[powbmps]

Just looked up the meter on line so you had it in the correct setting. With the meter displaying a moving reading on DC and even after the ALT was replaced it still doing it, then it might be the meter, or you had a bad ground. You wasn't measuring from the + side of the coil to the - side of the coil? If it was done that way, then this would explain the reading

Thanks a lot for checking that out. I'll grab another meter and test it out. I measured the voltage with the red on the + side and the black grounded on the engine.