1989 88 spl overcharging 15+ volts

[jonkhd]

I have a 1989 88 spl that charges at 15+ volts at idle. Electronics started to smoke. I tried 2 differnt rectifiers and still no change. Does anyone have any ideas what I should try? Could I put a watercooled regulater rectifier on this motor ? thanks

 

[jonkhd]

Re: 1989 88 spl overcharging 15+ volts

 

[R.Johnson]

Re: 1989 88 spl overcharging 15+ volts

Have you checked the condition of the battery?

 

[jonkhd]

Re: 1989 88 spl overcharging 15+ volts

the battery is brand new and tests good

 

[muskrat]

Re: 1989 88 spl overcharging 15+ volts

get a service manual check stator,the rectifer is unregulated and they will go as high as 16 volts.

 

[jonkhd]

Re: 1989 88 spl overcharging 15+ volts

It does go as high as 16 volts. is this normal for this type of charging system.

 

[Marc J.]

Re: 1989 88 spl overcharging 15+ volts

15 volts at idle sounds extreme. If I remember correctly from last year, my 88SPL would range from 12+ to 16+. 12+ at idle and 16 or so above half throttle. If you don't mind carrying around a 2nd battery dedicated to your electronics, it could be an easy solution to your problem. I think an earlier thread concerning adding a tach to a 88SPL had some more technical solutions.

 

[jonkhd]

Re: 1989 88 spl overcharging 15+ volts

Would I hook up my electronics strait to the second battery? And how would I charge that battery? And what would adding a tach do to solve my problem ?

 

[Marc J.]

Re: 1989 88 spl overcharging 15+ volts

Yes you could hook your electronics straight to a 2nd battery. You would need to recharge it (with a charger) when it drops below 12.3 volts or so. I'm not suggesting you add a tach, but most tachs are voltage sensitive as most electronics are. You could add a regulator, I haven't looked into it.

 

[seahorse5]

Re: 1989 88 spl overcharging 15+ volts

On an unregulated system, it is the battery size (capacity) that determines the max voltage. A maintenance free battery or one low on water will cause the voltage to rise.<br /><br />If you use a large deep cycle group 27, you will not have the problem.<br /><br />A quick fix is just to put 2 batteries in parallel, then you will never have a high voltage problem as long as they are in good shape.<br /><br />Back in those days we also wired the gauge lights and used the running lights to absorb some of the extra voltage.

 

[DJ]

Re: 1989 88 spl overcharging 15+ volts

If you use a large deep cycle group 27, you will not have the problem

Second that.

 

[jonkhd]

Re: 1989 88 spl overcharging 15+ volts

I'll Try that thank you

 

[jonkhd]

Re: 1989 88 spl overcharging 15+ volts

I installed a water cooled regulator/rectifier and it solved my problem so if anyone else out there has the same issue as me try this out works great .