anybody have this issue with a 2000 or older Supra

I have a 2000 supra launch and while i have have very few issues over the years and like my supra a lot, i am having this reoccuring issue with the MDC sending unit that controls the guages and speedo pickups etc..

Its basically the brain of the dash and has the water pick up running in the back of it and converts that into the digital speed plus runs the other critical guages ..

I have had that part replaced 4 times in 7 years..the first three were under warranty but the last wasnt and now it went out again..

It called a medallion brand mdc1600 sending unit..

i am going to pull this one apart and look at the internal parts to see what actually happened..my guess is the part of the unit seperating the water from the circuit board is cracking and then letting water get into the board and shorting out..

this happens every 18 months and maybe its the cold and it freezes and cracks but i am in Texas and use the boat during the winter without issue until it breaks..

I feel its a bad design and an issue that was resolved as Skiers choice upgraded this sytem in the 2001 with stacked circuitry and a paddle wheel.

So before i replace it has anybody else had this happen more then once or at all to their Supra/Moomba older then 2000?

I also wonder IF supra can help me with this and i will contact them to see if this time how hard would it be to upgrade to the newer harness,boards and paddle wheel and maybe help me with the cost of this since its happened now 4 times in 7 years and seems to be a flaw in the system..

this is getting frustrating and expensive..

any help or suggestions would be appreciated

tia

bill