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patrhodes
05-20-2013, 07:31 PM
Fired it up and gauges quit working, and water under helm after going out. M/C dealer said Electronic Module unit was not properly winterized and water coming in through pitots for mph. Said it would be $300-400 plus $125 labor. Does this sound about right? Also, how best to temporarily plug those up while we run a bit before fixing? I'm having tons of people to lake this weekend. Please advise! And how do you blow those out? I've never done this before and never had a problem in 11 years!

j.mccreight@hotmail.com
05-20-2013, 07:52 PM
You could probably use a golf ball tee to plug the pitot tubes at the mdc (the part that cracked) I am thinking if you can access the mdc and plug it to save your weekend you can very easily change it yourself saving you the $125 in labor at the shop. Mdc are available online.

ProStar Slalom
05-20-2013, 07:52 PM
Fired it up and gauges quit working, and water under helm after going out. M/C dealer said Electronic Module unit was not properly winterized and water coming in through pitots for mph. Said it would be $300-400 plus $125 labor. Does this sound about right? Also, how best to temporarily plug those up while we run a bit before fixing? I'm having tons of people to lake this weekend. Please advise! And how do you blow those out? I've never done this before and never had a problem in 11 years!


Hopefully it's closer to $300 than $400. You can swap it yourself; just a few electrical plugs and a couple of screws.

Not a good design in my opinion...water pressure mixing with an electrical component. I think to "winterize" you would just disconnect your pitot tube lines and let any water drain out of the box and blow out your tubes. After this happened to mine a few years ago I just left the pitot lines disconnected since I use PerfectPass for accurate speed anyway.

j.mccreight@hotmail.com
05-20-2013, 07:55 PM
$300 midwest mastercraft,

I don't know why they have it $250 list price and selling at $300 though...maybe typo

http://www.waterskis.com/508060-p/mastercraft_mdc_box_99_01.htm

petermegan
05-21-2013, 01:59 AM
Just pull the tubes off your pickups at the back, bend them back on themselves and duct tape so they are kinked close or do this on the MDC end. If you have PP to use for speed you are laughing otherwise grab your smartphone with GPS app. Easy to replace the box yourself. Have Fun.

patrhodes
05-21-2013, 07:41 PM
Do you know where the MDC is located on the boat and how hard to access?

ProStar Slalom
05-21-2013, 07:44 PM
Do you know where the MDC is located on the boat and how hard to access?


Under the dash/helm; black box about 5" square.

patrhodes
05-22-2013, 02:55 PM
Anybody install the Livorsi GPS Ski Speedometer? Sounds awesome and you eliminate the pitot's and tubing and water damaging the MDC. Sounds like a winner to me. What am I missing?

j.mccreight@hotmail.com
05-22-2013, 03:51 PM
Anybody install the Livorsi GPS Ski Speedometer? Sounds awesome and you eliminate the pitot's and tubing and water damaging the MDC. Sounds like a winner to me. What am I missing?

I have the livorsi ski gps speedometers...

patrhodes
05-23-2013, 10:20 AM
Did you install yourself? If so how difficult was it? Are you happy with it?

russlars
05-23-2013, 11:39 AM
Of course you are still going to need another MDC control box to run all of your gauges, etc. but whatever you do don't pay a dealer $125 labor to replace it. It is a piece of cake to replace yourself. I would recommend saving up and installing Perfect Pass. It is also a relatively simple install and you will never regret it. We call it "the marriage saver".

patrhodes
05-23-2013, 11:57 AM
Thanks for the great info! My thinking is if you don't have to connect the pitot lines to the MDC you should never have a water related problem with the MDC again?

j.mccreight@hotmail.com
05-23-2013, 01:10 PM
yes I installed myself, very simple install just need a switched 12v, ground, and light circuit, connect antenna and away you go, I am very happy with speedo heads minus the cost...

patrhodes
05-28-2013, 10:28 AM
Anybody ever try to dry out the MDC and reinstall? I pulled mine and there are no visible cracks in the unit. Water sloshing around inside. If I get all the water out and get it all dried out any chance it would work? Or am I wasting my time?

jessejames
06-05-2013, 03:36 PM
Patrhodes, I have the same problem as you. My 99 Prostar leaked water into my MDC through the Pitot tubes on the last day in the water last season. I looked it up then at Midwest Mastercraft (they are only a few miles from me in Minneapolis) and price was about $250. Now I just tried to order one from them and it is $550!!! http://www.waterskis.com/508060-p/mastercraft_mdc_box_99_01.htm?CartID=1

They said that their cost has gone up on it from Mastercraft. This is because MC relationship with Medallion is bad since they don't use them on new boats. So Medallion is jacking the price.........Anyway, I have a connection at Medallion from when I ordered a replacement matching fuel gauge last year. I am in the process of trying to buy direct from them and potentially cut out all the mark up cost. PM me if you want me to check if they have your model too (I'm assuming it is the same as mine).

As for trying to dry it out...I think you would need to drill a hole in it to drain it first. I'm an engineer in the electronics industry, and I highly doubt that the components on the circuit board would all still be working properly after a flood like that.

19_Skier
06-05-2013, 04:28 PM
Patrhodes, I have the same problem as you. My 99 Prostar leaked water into my MDC through the Pitot tubes on the last day in the water last season. I looked it up then at Midwest Mastercraft (they are only a few miles from me in Minneapolis) and price was about $250. Now I just tried to order one from them and it is $550!!! http://www.waterskis.com/508060-p/mastercraft_mdc_box_99_01.htm?CartID=1

They said that their cost has gone up on it from Mastercraft. This is because MC relationship with Medallion is bad since they don't use them on new boats. So Medallion is jacking the price.........Anyway, I have a connection at Medallion from when I ordered a replacement matching fuel gauge last year. I am in the process of trying to buy direct from them and potentially cut out all the mark up cost. PM me if you want me to check if they have your model too (I'm assuming it is the same as mine).

As for trying to dry it out...I think you would need to drill a hole in it to drain it first. I'm an engineer in the electronics industry, and I highly doubt that the components on the circuit board would all still be working properly after a flood like that.

Same thing happened to me this year, $400 for the box. The guy at Buckeye Marine MC said the same thing, last year they were $250! Hope you are able to buy direct.

patrhodes
06-05-2013, 05:27 PM
Seems to me that as long as you have the pitot tubes hooked up to the MDC you have a potential problem always. What do you guys think about installing a GPS speedometer? Or Perfect Pass? Then you should never have this problem again correct?

jessejames
06-05-2013, 05:57 PM
I have Perfect Pass. So I plan to just plug up my Pitot tubes, or better yet remove the ugly inputs for them from the back of the boat all together.

Perfect Pass is worth every penny if you pull skiers, wakeboarders, or surfers. I'm not sure on the GPS Speedo, but it is probably more accurate. What does it cost?

j.mccreight@hotmail.com
06-05-2013, 06:10 PM
I have Perfect Pass. So I plan to just plug up my Pitot tubes, or better yet remove the ugly inputs for them from the back of the boat all together.

Perfect Pass is worth every penny if you pull skiers, wakeboarders, or surfers. I'm not sure on the GPS Speedo, but it is probably more accurate. What does it cost?

Speedometer heads ~$230, antennas ~$250

patrhodes
06-06-2013, 04:48 PM
Medallion folks were wonderful help! My MDC unit was $171.82 plus $15 shipping. Was quoted $300 -$400 elsewhere plus installation. It shipped today. Fairly easy to pull it so install shouldn't be too bad. Would urge anyone that needs a new MDC to go direct.

Flatwaterfooter
06-07-2013, 09:13 PM
Medallion folks were wonderful help! My MDC unit was $171.82 plus $15 shipping. Was quoted $300 -$400 elsewhere plus installation. It shipped today. Fairly easy to pull it so install shouldn't be too bad. Would urge anyone that needs a new MDC to go direct.

What boat was this for waiting on pricing

JimN
06-07-2013, 09:25 PM
My first question would be "Who winterized it?".

The lines need to be purged annually and if they aren't, the water can work itself up from the rear. The problem with drying it out and trying to use it is that the diaphragm(s) may have ruptured, which means it will just happen again. If you don't plan to use the pitots again, dry it out and see if it works- if it does, WooHoo!

patrhodes
06-10-2013, 10:13 AM
Boat is a 1999 MasterCraft SportStar. I never blew out the lines before and never had a problem in 11 years! Just lucky I guess. So now I know and will probably never hook up pitot's again! Save up for a GPS speedo.

JimN
06-10-2013, 08:41 PM
Boat is a 1999 MasterCraft SportStar. I never blew out the lines before and never had a problem in 11 years! Just lucky I guess. So now I know and will probably never hook up pitot's again! Save up for a GPS speedo.

With the small amount of water inside, it doesn't need to be very cold for it to freeze- it's not like a large amount that requires lower temps over a longer time.

I don't know why these are seen as a bad thing- they work, they're fairly accurate and it takes part of a minute to clear them.

19_Skier
06-10-2013, 09:56 PM
My first question would be "Who winterized it?".

The lines need to be purged annually and if they aren't, the water can work itself up from the rear. The problem with drying it out and trying to use it is that the diaphragm(s) may have ruptured, which means it will just happen again. If you don't plan to use the pitots again, dry it out and see if it works- if it does, WooHoo!

interesting, I was told they are self draining. Learned that lesson the hard way and I am adding it to my list for each fall. How do you typically purge the lines? just a shot of air?

JimN
06-10-2013, 10:21 PM
interesting, I was told they are self draining. Learned that lesson the hard way and I am adding it to my list for each fall. How do you typically purge the lines? just a shot of air?

Who told you that? They were wrong.

Ever use an eye dropper? How well does that drain itself? Both are closed on one end and open on the other.

If you have a turkey baster, that would work. A vacuum pressure pump or low pressure compressed air work, too.

patrhodes
06-11-2013, 01:45 PM
Received new MDC from Medallion yesterday as promised! $171.82 plus $15 shipping! When I ordered they told me it was in stock; however they said that they are not always in stock and if they need to build it would be about 2 weeks. This is the way to go to save $100-200!

AlbertaSurfer
06-27-2013, 10:08 PM
Who told you that? They were wrong.

Ever use an eye dropper? How well does that drain itself? Both are closed on one end and open on the other.

If you have a turkey baster, that would work. A vacuum pressure pump or low pressure compressed air work, too.

Mine drain by themselves. Not sure if it has anything to do with the fact my MDC is right full of water currently, but after parking my boat at the house, while I'm milling about in the garage, hanging stuff to dry, they always dump water out of the pickups on the transom. Usually both at the same time.

Getting a new MDC has been painful. My local dealer wants $650, Medallion won't answer when I call them, and if I do find one online for a half reasonable price, they won't ship to Canada... :rolleyes:

If the relationship between Medallion and MasterCraft soured, why does the consumer have to pay?

patrhodes
06-28-2013, 09:20 AM
try this email: carin.langlois@medallionis.com
She is a customer service representative
I have her phone as 616-850-8014

AlbertaSurfer
06-28-2013, 11:33 PM
Got it today, $205 plus shipping. I told her what my local dealer was charging and she was surprised.

Good to go direct if they're willing I suppose

jessejames
07-02-2013, 03:08 AM
Anyone know if you can run your boat without the MDC plugged in?? Obviously the gauges won't work.

I got one from Medallion, but I forgot it at home and already drove up to the cabin for the week. So just wondering if I can drive without it for a day until my wife comes up and can bring it.....Anyone try it??

Also...check this thread out. http://www.themalibucrew.com/forums/index.php?/topic/3468-mdc-controller-help/
It sounds more feasible that the air leak allowing water up to diaphram is cause for failure than the freezing. It just doesn't make sense why some years and some boats are fine with not draining, and then 1 year you aren't. It also makes more sense that the tubes are full of air and the air gets compressed by the water at the pickup. This would also mean that they drain on their own and if they didn't, then the MDC still would not be affected.

Question is now....Why do they leak, and how do you prevent that? Especially if I'm putting on a new one, how do I know the leak is fixed and not going to happen again?

JimN
07-02-2013, 07:37 AM
Anyone know if you can run your boat without the MDC plugged in?? Obviously the gauges won't work.

I got one from Medallion, but I forgot it at home and already drove up to the cabin for the week. So just wondering if I can drive without it for a day until my wife comes up and can bring it.....Anyone try it??

Also...check this thread out. http://www.themalibucrew.com/forums/index.php?/topic/3468-mdc-controller-help/
It sounds more feasible that the air leak allowing water up to diaphram is cause for failure than the freezing. It just doesn't make sense why some years and some boats are fine with not draining, and then 1 year you aren't. It also makes more sense that the tubes are full of air and the air gets compressed by the water at the pickup. This would also mean that they drain on their own and if they didn't, then the MDC still would not be affected.

Question is now....Why do they leak, and how do you prevent that? Especially if I'm putting on a new one, how do I know the leak is fixed and not going to happen again?

They leak because they DON'T always drain on their own. It's not a thin tube going from the transom to the dash, there's a larger brass cylinder called a ballast that kind of softens the pressure from the pitot(s). If it isn't drained, and this IS part of general maintenance whether anyone wants to think it should be necessary or not, the water can eventually fill the ballast. When that happens, the thin diaphragm in the speedo or MDC fails and at that point, there's nothing keeping it from working its way to the MDC or speedo. The part in bold type above is accurate WRT the principle behind these.

The only way around this is to use an electronic pickup that never sends water to the speedo or MDC.

The only way to prevent this is to purge them of water, periodically. Since it takes almost no time, I don't understand why this is such a common problem. Blow out the lines from the front, connect the MDC and it will work as long as the diaphragm in the MDC is intact. Until you install the MDC, stick a golf tee in the end(s) of the lines so water doesn't fill your shoes (drip on the floor under the dash).

You should be OK if you don't have the MDC.