View Full Version : 1989 prostar.... No power

07-19-2011, 09:58 PM
We were out enjoying our new boat (new to us) on a first cruise (while on vacation) went to head in and the motor started to turn over and then... Nothing.... No power to anything... Not even the horn!
Could a battery just die like that? The radio that is wired direct won't even turn on! HELP!!! I am posting this from my Blackberry!


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07-19-2011, 09:59 PM
loose, corroded battery cables?

07-19-2011, 10:28 PM
I just put the charger to the battery and I have power. Could a battery go from starting to turn over the motor to killing it to thje point the radio and horn will not even work?
At this point I am hoping it is only a battery.

Any recommendations for battery? Currently it has a Interstate....

07-19-2011, 10:29 PM
interstate is what I have

07-19-2011, 10:41 PM
If a battery has a loose internal plate it could do that. More likely a a bad connection. Ground at the block is commonly ignored and has stranded me in both truck and boat.

07-19-2011, 10:44 PM
+1 replace the ground going to the block.

07-19-2011, 10:52 PM
Take a volt meter and check voltage at different points in the boat. Start at the battery and work towards the circuit breaker and battery switch at the motor if you have one. At least use a test light. It will tell you where power is to where it stops.

07-19-2011, 11:17 PM
The connections are clean and tight for sure. Only when the charger is on do I get power. I think the battery is flat dead but I never had one go so quick to the point of not even having enough juice to sound the horn....

07-19-2011, 11:21 PM
But with the radio directly wired to the Battery. That makes me think it could be something like a bad plate in it.

Miss Rita
07-19-2011, 11:49 PM
It's the battery. Nothing against Interstate, but sometimes stuff happens.

07-20-2011, 08:54 AM
What class and size do I need .... CCA.....

07-20-2011, 11:41 AM
I have an optima blue top in my '89. Not the deep cycle.

07-20-2011, 01:32 PM
either 24 or 27 is my guess. Get the most CCA you can.

Could it not be the alternator?

07-21-2011, 01:39 PM
Try the kill switch on the dash. Mine was in place (with no lanyard of course) and I did not even think of it going bad. I was dead on the trailer last week. I then read several threads here about bypassing it due to potential failure (and the fact that nobody uses it). That was the problem. It also killed the horn, lights, stereo, etc. on my 1990 Tristar. I am now back and running. Good luck!

07-23-2011, 10:15 PM
Ground Cable....

07-23-2011, 10:28 PM
x2 on dead man switch (kill switch) on dash

Something similar happened to me

07-23-2011, 10:29 PM
All kill switches fail eventually.