- Oct 23, 2020
- 39
- Boat Info
- 2012 SUNDANCER 260, Lowrance Elite 5, Venture trailor, F150 platinum,
- Engines
- 350 Mercruiser
I have a 1990 250DA. My gas sending unit died so I bought a Sierra replacement. Then I watched a bunch of You Tube videos. I noticed the old sending unit didn't have a ground. The new unit instructions said to ground it. The main ground terminal was located on the gas tank, 4 inches from the ground terminal of the sending unit. So I ran a ground wire.
I removed some old gas in my tank. I put in 12 gal of new gas and began to crank it until it got thru the system.
I heard something that sounded like boiling. Then hot fumes started belching from my gas weep hole. I rapidly cut off all power and got off the boat until things cooled down. The entire 12 gal. was gone. The inside of my gas tank was scarred. I had created a dead short and turned the tank into an oven!
I spent 2 days flushing my tank and removing residue. I am installing a second sending unit. The 1990 sending unit was grounded by the screws to the gas tank. No ground wire.
LESSON LEARNED. Observe and follow original wiring first.
Has anyone heard of this?
I removed some old gas in my tank. I put in 12 gal of new gas and began to crank it until it got thru the system.
I heard something that sounded like boiling. Then hot fumes started belching from my gas weep hole. I rapidly cut off all power and got off the boat until things cooled down. The entire 12 gal. was gone. The inside of my gas tank was scarred. I had created a dead short and turned the tank into an oven!
I spent 2 days flushing my tank and removing residue. I am installing a second sending unit. The 1990 sending unit was grounded by the screws to the gas tank. No ground wire.
LESSON LEARNED. Observe and follow original wiring first.
Has anyone heard of this?