How can you test for this?
About two weeks ago, my 07 Maristar 215 SS starting taking on water in the fwd bilge. Takes on water both underweigh and at rest--no discernable difference.
Was thinking it might be the seal for the speedo or water temp sensor but after reading this thread, am thinkng it may be the drain plug.
How can I test to identify the source?
Also, what's the procedure to reseal the plug? Is this a task better left to pros?