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Old 11-10-2013, 10:59 PM
bigdog bigdog is offline
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Join Date: Nov 2013
Boat: Mastercraft, Prostar 190, 1996, LT-1
Location: Southwest
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Winterization, LT1. Engine drain

I am having a difficult time finding the 2 drain locations on my engine (1996 prostar 190, LT1). I have drained all water out of the exhaust manifolds. Drained all I could out of the impeller housing. Please help, starting to get real cold here in the next few days and need to get my boat winterized. thanks.
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Old 11-10-2013, 11:01 PM
bigdog bigdog is offline
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Boat: Mastercraft, Prostar 190, 1996, LT-1
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Pictures would be very helpful. Also I am not planning on putting antifreeze in because of the aluminum heads. thanks.
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  #3  
Old 11-10-2013, 11:44 PM
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Andyg Andyg is offline
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There are two drain plugs on the block. The one on the port side should be a brass petcock type drain on the underside of the block. The drain on the starboard side has the knock sensor screwed into it. You need to disconnect the knock sensor wires then you can unscrew the knock sensor.

Check this thread out. It shows a pic of the knock sensor. The pic with the blue wire.

http://www.mastercraft.com/teamtalk/...ad.php?t=27558

Andyg
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Old 11-11-2013, 09:33 AM
bigdog bigdog is offline
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Boat: Mastercraft, Prostar 190, 1996, LT-1
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Thanks Andyg. That is very helpful. I can finish winterizing now before it gets into the teens here tomorrow.
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  #5  
Old 11-11-2013, 10:00 AM
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Jerseydave Jerseydave is offline
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Boat: 2005 X-STAR & 1993 Prostar 190 Limited
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I drain mine, then fill with West Marine -60 purple anti-freeze. It says "safe for aluminum engines"

The tilted engine angle scares me that some water might be still in the rear section of the coolant passages. I recall reading on here that the freeze plug behind the starter could pop out.
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Old 11-11-2013, 10:28 AM
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Quote:
Originally Posted by Jerseydave View Post
I drain mine, then fill with West Marine -60 purple anti-freeze. It says "safe for aluminum engines"

The tilted engine angle scares me that some water might be still in the rear section of the coolant passages. I recall reading on here that the freeze plug behind the starter could pop out.
Set up a fake a lake and Winterize that way, this ensures Anti Freeze goes all the way thru the Motor- takes 10 mins to do, we did 3 boats Sunday in 30 Mins- had them lined up side X Side- Side note, be sure to warm up the motor so the Thermostat is open
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Old 11-11-2013, 12:04 PM
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Ski-me Ski-me is offline
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Boat: Mastercraft, Prostar 205, 1994, LT1
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I also did a write-up on the LT1 winterization.....

http://www.mastercraft.com/teamtalk/...t=51183&page=7
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