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Forum: Engine / Drive Train Yesterday, 10:17 PM
Replies: 67
Views: 1,055
Posted By Jeff d
It probably doesn't matter but I'd shut it down...

It probably doesn't matter but I'd shut it down before reconnecting the MDC.
Forum: Engine / Drive Train Yesterday, 10:16 PM
Replies: 67
Views: 1,055
Posted By Jeff d
Once again I can't say for sure on your boat. ...

Once again I can't say for sure on your boat. Mine has been running without an MDC in the boat all season. No alarms or anything. My alarm and check engine light still does the self test as...
Forum: Engine / Drive Train Yesterday, 10:09 PM
Replies: 67
Views: 1,055
Posted By Jeff d
Also, that lends some credibility to what...

Also, that lends some credibility to what uplander was saying. If on later models they went to a single sender and split the signal off to the MEFI and the MDC then your MDC very well could be...
Forum: Engine / Drive Train Yesterday, 10:05 PM
Replies: 67
Views: 1,055
Posted By Jeff d
Does the alarm sound if you leave the sender...

Does the alarm sound if you leave the sender connected and disconnect the MDC? If not then you probably can still do an analog gauge without issue. It likely splits off to the MEFI prior to the...
Forum: Engine / Drive Train Yesterday, 10:02 PM
Replies: 67
Views: 1,055
Posted By Jeff d
That's interesting. Maybe they've integrated the...

That's interesting. Maybe they've integrated the senders on the Predator. They're definitely separate on my LTR. My sender wire only connects to my analog gauge and I get no alarm. I have a...
Forum: Engine / Drive Train Yesterday, 09:49 PM
Replies: 67
Views: 1,055
Posted By Jeff d
I only have 1st hand experience with my boat but...

I only have 1st hand experience with my boat but I can tell you with certainty that on the 2000 LTR the MEFI computer (which triggers the alarm and the check engine light) has no idea that the gauge,...
Forum: Engine / Drive Train Yesterday, 09:16 PM
Replies: 67
Views: 1,055
Posted By Jeff d
Well the test you did was still pretty good. If...

Well the test you did was still pretty good. If there was a path to ground aside from the MDC then you'd see a lower than 240 ohms with the MDC disconnected. You only need to test further if you...
Forum: Engine / Drive Train Yesterday, 09:09 PM
Replies: 67
Views: 1,055
Posted By Jeff d
I'd say it's the MDC. If it's showing 240 ohms...

I'd say it's the MDC. If it's showing 240 ohms all the way back to them MDC with it disconnected then your wiring is almost certainly fine. I listed a couple of options for further testing of the...
Forum: General Discussion Yesterday, 06:17 PM
Replies: 8
Views: 278
Posted By Jeff d
Yep. I was in the same situation. I had a bad...

Yep. I was in the same situation. I had a bad sender for sure but my gauge and MDC also were not working right. Really the only gauge that worked right on my dash was the voltage. I took the...
Forum: General Discussion Yesterday, 02:00 PM
Replies: 8
Views: 278
Posted By Jeff d
That'll do it. A partial MDC-lobotomy if you...

That'll do it. A partial MDC-lobotomy if you will. I gave mine a full lobotomy. I used the same Wema SSS sender as my OE sender was bad in addition to my gauge/MDC problems.

Good call on the...
Forum: Engine / Drive Train Yesterday, 10:43 AM
Replies: 67
Views: 1,055
Posted By Jeff d
I can't say for sure but logically that's all...

I can't say for sure but logically that's all that's left. Your sender and harness would be confirmed good at that point. Was your gauge new or used and confirmed working by you personally (These...
Forum: Engine / Drive Train Yesterday, 09:44 AM
Replies: 67
Views: 1,055
Posted By Jeff d
Not necessarily. That could very well be an...

Not necessarily. That could very well be an indication of a bad MDC or just a "red herring" but I've never tested that exact scenario so I don't know what the normal results would be.

Disconnect...
Forum: Engine / Drive Train Yesterday, 09:41 AM
Replies: 67
Views: 1,055
Posted By Jeff d
I can say with certainty that there is no direct...

I can say with certainty that there is no direct relationship between the buzzer/check engine light/MEFI computer and the MDC/Gauges.

The MDC + gauges is a completely separate system and has no...
Forum: Engine / Drive Train Yesterday, 09:31 AM
Replies: 67
Views: 1,055
Posted By Jeff d
I could be wrong but I don't believe that the...

I could be wrong but I don't believe that the MEFI computer monitors for high oil pressure so the buzzer is likely unrelated. It does monitor for low oil pressure through a separate binary (i.e....
Forum: Engine / Drive Train 07-28-2014, 11:24 PM
Replies: 67
Views: 1,055
Posted By Jeff d
This will 100% never work on a boat with...

This will 100% never work on a boat with Medallion gauges and an MDC unless you replace the gauge with a normal analog gauge. The gauge itself has no idea what to do with the raw, analog resistance...
Forum: Engine / Drive Train 07-28-2014, 11:19 PM
Replies: 67
Views: 1,055
Posted By Jeff d
Based on this info your sender is very likely...

Based on this info your sender is very likely within spec. 240 ohms to ground is correct for 0 PSI on an american marine oil pressure sender. 80 ohms would indicate in the range of around 50 PSI...
Forum: Appearance 07-28-2014, 08:25 PM
Replies: 5
Views: 289
Posted By Jeff d
Waterline fit cover. I don't think you can beat...

Waterline fit cover. I don't think you can beat it with a wax or protectant in direct sunlight on the water all day unless you're excessively diligent with keeping it waxed. If it's hard to get to...
Forum: Electrical 07-28-2014, 03:39 PM
Replies: 7
Views: 213
Posted By Jeff d
This is the way to...

This is the way to go:
http://www.mastercraft.com/teamtalk/showthread.php?t=61353
Forum: Electrical 07-27-2014, 10:16 AM
Replies: 11
Views: 777
Posted By Jeff d
I found the wire colors in the MDC...

I found the wire colors in the MDC troubleshooting guide. It's covered in the other thread I linked in the OP.
Forum: Electrical 07-27-2014, 09:58 AM
Replies: 11
Views: 777
Posted By Jeff d
No, it was a pitot speedometer. No integrated...

No, it was a pitot speedometer. No integrated depth gauge. It was separate and didn't match from the factory.
Forum: General / Other 07-25-2014, 05:25 PM
Replies: 11
Views: 406
Posted By Jeff d
For what it's worth my 2000 has that same rocker...

For what it's worth my 2000 has that same rocker switch that says "Speed Control" and there's nothing connected to the terminals on the rear. It was never equipped with that feature. Apparently...
Forum: Electrical 07-25-2014, 01:07 PM
Replies: 11
Views: 777
Posted By Jeff d
I left it on eBay for a few weeks and finally...

I left it on eBay for a few weeks and finally sold the speedometer for $30. I thought I'd get more but that brings the total cost for the new gauges to $142.12 plus a few bucks for crimp connectors....
Forum: General Discussion 07-25-2014, 01:03 PM
Replies: 2
Views: 134
Posted By Jeff d
Welcome to what is likely the first of many gauge...

Welcome to what is likely the first of many gauge related issues that you will encounter. It's either the tach itself of the MDC. The dealer can pull it for you but they'll probably charge an hour...
Forum: General Discussion 07-24-2014, 03:28 PM
Replies: 12
Views: 468
Posted By Jeff d
I run 750s in my 230 VRS. They get nice and...

I run 750s in my 230 VRS. They get nice and plump in there and should be at the 950 lb "expanded weight" that fly high advertises. So, you'll only gain about another 100 lbs in the compartment vs....
Forum: Engine / Drive Train 07-24-2014, 01:41 PM
Replies: 17
Views: 615
Posted By Jeff d
Yea, if you can't get the non-ethanol it's fine. ...

Yea, if you can't get the non-ethanol it's fine. Some people swear by the Sta-Bil Marine if you have to use ethanol.

Also, I wouldn't store ethanol fuel over the winter. Drain it as low as you can...
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