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Old 13 July 2020, 10:07   #1
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Suzuki DT voltage regulator

Hi guys , my Suzuki DT 100 , 1996 era is occasionally charging at over 16volts , does anyone know if this voltage rectifier is a regulated rectifier or just a rectifier?
I have a spare so I can swap it but if the other is the same then I’d rather fit something that keeps it below 15 volts .

Cheers , John
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Old 13 July 2020, 11:17   #2
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Originally Posted by John hulme View Post
Hi guys , my Suzuki DT 100 , 1996 era is occasionally charging at over 16volts , does anyone know if this voltage rectifier is a regulated rectifier or just a rectifier?
I have a spare so I can swap it but if the other is the same then I’d rather fit something that keeps it below 15 volts .

Cheers , John


Is it 16V across the battery or open cct? Does the voltage reduce as the battery charges or is it a constant 16V?
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Old 13 July 2020, 11:37   #3
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I've just been through the genuine Suzuki workshop manual I have for DT150/200/225 including the EFI models.

Annoyingly, it at no point mentions the Reg/Rec output, it just mentions output from the individual charging coils pre the Reg/Rec.

16V does seem a little high to me if it's across the battery terminals. As you've suggested 14.5V-15V would sound more sensible.

Have you tested it with a multi-meter?
Or are you quoting a Voltmeter in your Dash?

Nasher.
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Old 13 July 2020, 13:49   #4
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Originally Posted by Nasher View Post
I've just been through the genuine Suzuki workshop manual I have for DT150/200/225 including the EFI models.

Annoyingly, it at no point mentions the Reg/Rec output, it just mentions output from the individual charging coils pre the Reg/Rec.

16V does seem a little high to me if it's across the battery terminals. As you've suggested 14.5V-15V would sound more sensible.

Have you tested it with a multi-meter?
Or are you quoting a Voltmeter in your Dash?

Nasher.


Its showing 16v on the digital display when running at the higher rev range , I’ll have to put a meter on it and take it out again , I’ve had battery acid in the battery box and not sure if it’s come out due to wave jumping or if it’s because it’s over charging . I guess the quickest test is just swop the rectifiers over and see if the other one keeps the voltage output lower .
Thanks for your help guys
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Old 13 July 2020, 13:58   #5
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John

In case you haven't found it yet, using the search function in this Forum has been a help to me in the past:

https://www.suzukioutboardforum.com/...rd-parts-forum

Nasher.
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Old 13 July 2020, 14:36   #6
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John



In case you haven't found it yet, using the search function in this Forum has been a help to me in the past:



https://www.suzukioutboardforum.com/...rd-parts-forum



Nasher.


Cheers for the link [emoji106]
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Old 13 July 2020, 18:30   #7
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If it’s any help, mine produces between 13.5 and 14.5v across the battery at 5,000rpm.

Gadge
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Old 13 July 2020, 19:33   #8
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If it’s any help, mine produces between 13.5 and 14.5v across the battery at 5,000rpm.

Gadge


Sounds like mine is on its way out then , cheers for the info .
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Old 27 July 2020, 09:47   #9
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Sounds like mine is on its way out then , cheers for the info .
I'd check your battery terminals, voltage will spike if one's making intermittent bad contact.
Rec/reg units are simple, much the same as on 80s 2stroke bikes. They usually either work or fail. Intermittent is highly unusual.
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Old 17 April 2021, 18:44   #10
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Did you ever get to the bottom of this John? First time out this season today and mine's kicking out 16.5-17v...!
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Old 18 April 2021, 10:14   #11
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Did you ever get to the bottom of this John? First time out this season today and mine's kicking out 16.5-17v...!


Hi , yes I did , I changed the regulator and now have 13v at idle and 14.4 when under way .
I got a second had Suzuki Reg from Sam on 07779504039 he breaks two stroke outboards and was very helpful.
Good luck [emoji108]
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