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Old 07-21-2008, 09:26 PM
law32ps87 law32ps87 is offline
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Join Date: Aug 2007
Boat: mastercraft prostar 87 351
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boat wont start.. HELP

My 87 prostar has been sidelined for a couple of weeks because of a bent strut an shaft. I have finished the install and aligning the engine and decided to run the engine since it hasnt been running in a while. Well when i tried starting it the starter stayed engaged and wouldnt stop until i pulled the battery cables. I then pulled the cable off the starter, hooked the battery cables back up, and got a reading of about 13 V with the ignition off. I then hit the solenoid thinkin it was stuck, the reading then dropped to 0 but wouldnt work again after that. So I bought a new solenoid and all new cables since mine were looking old. I hooked everything back up and didnt get anything, not even a click. I also greased the starter bendix and cleaned the mounting location. I am getting a lil less than 13V to the battery side of the solenoid but noting on the starter side when i try starting. I have also jumped the solenoid and the starter did engage so I know the starter is fine. I also get like 10.5V to the I and S posts on the solenoid with the ignition in the run position. I have checked and cleaned all the ground points, starter, solenoid, and battery. Please help i wanna get back on the water before fall classes start.

Thanks Matt
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Old 07-22-2008, 04:25 PM
law32ps87 law32ps87 is offline
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Boat: mastercraft prostar 87 351
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Also does anyone know if you should be seeing voltage on the S post of the solenoid when the ignition is in the run position, or only when cranking
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Old 07-22-2008, 04:32 PM
TMCNo1 TMCNo1 is offline
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Quote:
Originally Posted by law32ps87 View Post
Also does anyone know if you should be seeing voltage on the S post of the solenoid when the ignition is in the run position, or only when cranking
Sorry, I misunderstood the question and can't answer.
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Old 07-22-2008, 05:00 PM
law32ps87 law32ps87 is offline
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Boat: mastercraft prostar 87 351
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Quote:
Originally Posted by TMCNo1 View Post
Sorry, I misunderstood the question and can't answer.
Sorry... i was talking about the yellow/red wire that comes from the ignition switch to the neutral safety switch up to the starter relay.. From what i understand that wire energizes the relay which then allows power to the starter. But should i be getting a voltage reading there at the relay only when i am cranking or when the ignition is just in the run position. If that makes any sense.
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Old 07-22-2008, 05:02 PM
TMCNo1 TMCNo1 is offline
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Quote:
Originally Posted by law32ps87 View Post
Sorry... i was talking about the yellow/red wire that comes from the ignition switch to the neutral safety switch up to the starter relay.. From what i understand that wire energizes the relay which then allows power to the starter. But should i be getting a voltage reading there at the relay only when i am cranking or when the ignition is just in the run position. If that makes any sense.

I think JimN can answer that better than I can! Anyone?
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  #6  
Old 07-22-2008, 08:52 PM
law32ps87 law32ps87 is offline
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Join Date: Aug 2007
Boat: mastercraft prostar 87 351
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Problem solved. I cleaned all the grounding locations again. I decided to try using the old solenoid again and after i tightened everything up, she fired right up. I cant wait to hit the lake early tomorrow morning!
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