I have no idea if it fixed the problem on Leanz stang or not.But since rreynold6 updated this post,I might as well add.
I have been noticing the past few weeks that the current position where the gauge needle sits has been gradually sinking.It now goes to the first bold white line before the letter "N" in "NORMAL".Yesterday it moved to between the red line and the bold white line.Today it's back to just before the "N".This was really starting to bug me.Popped the hood and took my meter (It's a MAC Tools EM720 just for ref purposes),and used it to jump the sender wire directly to ground.What I did was disconnect the wire and run it through the ammeter then jump directly to ground.Looking at the gauge,it showed the needle sitting flush on the "M" in "NORMAL".So,it's NOT a gauge problem.Leaving the sender wire connected to the ammeter,I then connected the ground side to the sender.Gauge was sitting on first white line.The current (I) readings on both tests were --- Sender wire direct to ground = 115 mA , Sender wire to Sender = 39mA.I pulled the oil cap and the rockers were flicking a steady flow of oil.So it can't be a pressure issue.Either the sender tube is plugged,the sender itself is faulty,or there is a bad sender to ground connection in the threads.Seems odd but it may be some RTV on the threads causing bad contact.Don't know,but I highly doubt that's what it is.As this problem started many years ago and only has become worse over time.The stock sender,and 2 replaced units making a grand total of 3.....I doubt its a contact issue.