"James...don't know for su
"James...don't know for sure but this is what I suspect. The sender comes with a piece of black duplex wire with a rubber grommet on it to seal it where the wire goes through the transom mount. The wire plugs into a connector at the rear of the engine, you can easily see the wire come through the transom mount and just follow it to the connector. You will notice that the connector does not come with the new sender, you must remove it from the existing one which means pushing out the 2 pins in the connector and then putting the new pins from the new sender into the connector after you have fed it through the transom mount. The connector is too big to fit through the hole where the grommet goes thats why you have to remove and install it. I suspect the tool is to push the pins through but I've always used a screwdriver and needle nose pliers to do this and re-install."