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Old 06-10-2013, 04:35 PM
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Table Rocker Table Rocker is offline
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Join Date: Oct 2010
Boat: '96 ProStar 205, Sammy Duvall, LT-1
Location: Fayetteville, Arkansas
Posts: 2,417
I used PermaTex Threadlocker Blue on mine after reading up on how it tolerates gasoline. It is still doing well.
'96 ProStar 205 SD LT-1
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Old 06-10-2013, 11:15 PM
Tateau18 Tateau18 is offline
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Join Date: Dec 2012
Boat: 1994 Mastercraft Maristar 225VRS 1996 Mastercraft Prostar 205
Location: Southeast
Posts: 89
Tried this repair tonight. Got a good reading on the ohm meter after repair but the gauge is still showing empty... Any ideas what it could be? Thanks for the help.
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Old 06-10-2013, 11:55 PM
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mikeg205 mikeg205 is offline
Join Date: Aug 2011
Boat: 1995 Pro Star 205 5.7 Liter
Location: Plainfield - Joliet, IL
Posts: 17,459
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Gauge may have given up it's ghost... here's an inexpensive replacement http://www.cheaperthandirt.net/produ...FdFDMgodKhQAIQ
...A bad day water skiing still beats a good day at work...1995 Pro Star 205....
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Old 06-11-2013, 07:55 AM
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You can try connecting the sending unit to the wiring harness and turning it onto its side to move the float. If you are getting the proper readings when you bench test the sending unit you should see the guage move as you tilt it. If not, perhaps you don't have the wiring harness connected to the proper terminals? And of course the guage could be bad too.
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Old 06-11-2013, 08:51 AM
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JimN JimN is offline
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Posts: 13,102
Originally Posted by Tateau18 View Post
Tried this repair tonight. Got a good reading on the ohm meter after repair but the gauge is still showing empty... Any ideas what it could be? Thanks for the help.
Check for voltage at the pink wire to the sender. It's not high current, so there's no danger of sparks. Touch the pink wire to the black wire at the sender. If you see no movement, do the same at the gauge and see if it pegs the needle. If it pegs the needle at the gauge, you have a problem with the wires or a terminal.
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Old 06-22-2013, 04:24 PM
Cosmo Cosmo is offline
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Join Date: Jun 2013
Boat: 1992 Prostar 205
Location: Northeast
Posts: 1
I just wanted to comment on this thread as a new(new to me, I just bought a 92 prostar 205) mastercraft owner. I read this randomly while surfing the net, and thought I would give it a shot. While it took me longer than 20 minutes, this seams to have fixed my sending unit. My fuel gauge is now working again. Mark me down as another person who this fix has worked for. Thanks for the thread!
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Old 06-17-2014, 05:41 PM
pnrscott pnrscott is offline
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Join Date: Jun 2014
Boat: 1994 Prostar 205
Location: TX-Texas
Posts: 22
I am original owner of a 94 ProStar 205. It has been on dry land for about 2 years (Texas drought and we did a 13 month relocation). Got back to Austin and took 2 runs up Lake Austin and was amazed that the fuel guage kept showing full... incredible fuel consumption!! Or the gauge/sending unit was not working.
Yep, sending unit was the culprit and everything to repair was in this thread! It was exactly what I needed. I used JB Weld "Water Weld" to attach the magnets.
Probably good to go another 20 years.
Thank you Team Talk!!
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Old 07-23-2014, 01:01 PM
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justinglow justinglow is offline
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Join Date: Mar 2007
Boat: 1995 Prostar 205
Location: Prosper, Texas
Posts: 891
So my 95 205 gas gauge was pegged on full for the past month or so. Took the sender apart like the post showed and sure enough it's the magnets on the sending unit. Have it all apart like the pictures show ready to glue and reassemble.

One question though, how do I know I have the magnets polarity correct before I reinstall? Might be a dumb question but better safe than sorry before I JB Weld them in.
1995 Mastercraft Prostar 205

Former 1986 Mastercraft Skier
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Old 07-23-2014, 04:12 PM
GKinTN GKinTN is offline
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Join Date: Oct 2013
Boat: 1991 Prostar 190
Location: Southeast - Nashville, TN area
Posts: 110
This should help with your polarity question:

I repaired my '91 PS190 sending unit a couple months back as my magnets were both scattered about. My sending unit looked like the one in the pic at the start of this thread. The float has one long slot where two magnets are placed long wise at each end with a gap between them. I held the two magnets pointed towards each other (like they are oriented in the float slot) but held them tip to tip and found the orientation where the magnets pushed each other apart. Then I glued them in that position, but of course in the slot they are spaced a little apart (as the pic shows) but they don't push enough to fight the glue. I used regular JB weld. Check your soldering over well, mine was a tiny bit cracked near one of the terminal rivets up top but a little soldering fixed that. My gauge works great now for just $1 worth of glue and a little effort!
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Old 03-15-2015, 06:27 PM
hddoktr hddoktr is offline
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Join Date: Jan 2012
Boat: 1996 bf200 yamaha proV 200
Location: northwest coast
Posts: 21
Junk Fuel Sending Unit

Stock ones are JUNK ! Type WEMA FUEL SENDER, get a great quality stainless steel sender for ABOUT 43 bucks, stop fooling around with magnets and silicone and JB weld. That stuff is cutting into your water time
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