View Full Version : Oil drain plug thread size 98 LT1

09-25-2006, 02:40 PM
Hi all I have a simple question. I am trying to determine the thread size on the oil pan for the drain plug. It is either 1/2 x 20 thread or it is a metric thread 12.5mm I forget the thread pitch I would guess 1.25. I am thinking about ordering up an vavle for the oil pan http://www.fumotousa.com/main.htm
and I am trying to determine the part number I will need. Any help would be great since the boat is like 200 miles away.


09-25-2006, 02:44 PM
Are you just looking for a valve or the entire oil drain setup?

Does you boat already have one of these (http://www.skidim.com/products.asp?dept=1054)?

09-25-2006, 03:00 PM
Actually I am looking to install the valve and the hose. Many of the valves you purchase will have a threaded female end. The valve along with the hose will provide a failsafe back up incase something were to fail. At least that is my logic behind using the two. Thinking 20 bucks is cheap insurance :)