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  #31  
Old 06-16-2013, 09:32 PM
Tateau18 Tateau18 is offline
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Boat: 1994 Mastercraft Maristar 225VRS 1996 Mastercraft Prostar 205
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I have been running the boat every weekend now with no issues after I cleaned the fuel pump inlet screen. The LT1 is definitely a power house. Can anyone with the same year or close model tell me if their check engine light comes on when the key is in the on position? I have yet to see mine come on at all and I am wondering if the bulb is out. My last boats check engine light and engine alarm would come on when the key was in the on position until the boat was started. Not having any problems here just curious if I need to swap a bulb or light. I know I definitely want it working if I ever do have a problem. Thanks for the help.
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  #32  
Old 06-16-2013, 09:53 PM
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Table Rocker Table Rocker is offline
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Boat: '96 ProStar 205, Sammy Duvall, LT-1
Location: Fayetteville, Arkansas
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Originally Posted by Tateau18 View Post
I have been running the boat every weekend now with no issues after I cleaned the fuel pump inlet screen. The LT1 is definitely a power house. Can anyone with the same year or close model tell me if their check engine light comes on when the key is in the on position? I have yet to see mine come on at all and I am wondering if the bulb is out. My last boats check engine light and engine alarm would come on when the key was in the on position until the boat was started. Not having any problems here just curious if I need to swap a bulb or light. I know I definitely want it working if I ever do have a problem. Thanks for the help.
I have a '96 LT-1 and have yet to see the check engine light come on. I hope it isn't burnt out, but just doesn't come on when the key is on. Not much help, but we are in the same situation.
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  #33  
Old 06-28-2013, 09:55 AM
Schrade Schrade is offline
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Boat: Currently Boatless
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I have a 1994 LT1 PS205 and my check engine light does not come on either.
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  #34  
Old 06-28-2013, 04:34 PM
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jakethebt jakethebt is offline
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Boat: '96 Prostar 205 LT-1
Location: Dayton, OH
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'96 LT-1 here and mine never comes on either, ever.
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  #35  
Old 07-10-2013, 02:23 AM
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charrison327 charrison327 is offline
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Join Date: Jun 2010
Boat: 1996 ProStar 190 LT1
Location: Southeast, NC
Posts: 170
I was curious about the light as well, so pulled the panel out one day and just made a direct connection to the battery to see. worked just fine
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  #36  
Old 04-15-2018, 03:33 PM
mbwtrpolo mbwtrpolo is offline
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Join Date: Apr 2018
Boat: '96 Mastercraft Maristar 225VRS
Location: Northwest
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Originally Posted by jakethebt View Post
'96 LT-1 here and mine never comes on either, ever.
Long-time reader, but new to posting here! I couldn't figure out what the light was for, since I knew the MEFI was not tied to the dash via the data plug. I spent some time sleuthing around last night and after testing with a multimeter and tracing wires, I found that for my 1996 LT-1 (Maristar), the temperature switch on the port side of the engine with a tan wire with black stripe is the only thing that runs to that "Check Engine" light in the dash. After I did some more research, I believe it is a 210F temperature switch that is normally open under 210F, and then closes over that temp to alert the driver of an engine cooling issue. I wouldn't want to test that coming on, so that's a really good sign if you haven't seen it come on!

It's a new-to-me boat so I'm benchmarking everything and changing the thermostats, old cooling hoses, wet exhaust hoses from the manifold to transom, etc.
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  #37  
Old 04-15-2018, 04:21 PM
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mikeg205 mikeg205 is offline
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Boat: 1995 Pro Star 205 5.7 Liter
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Thanks.. u r correct.. data port on early days waa for diagnostics

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