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Retired Wrencher

1056 model

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Retired Wrencher

Does anybody have an idea how many amps you need to turn over a 10 hp Kohler with a starter generator? Is it 50 A or more? I found a heavy duty one with 20 apps is that enough?

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pfrederi

The S/G just takes battery amperage to spin the engine.  As a generator the old S/Gs only made about 12 amps.  They are rated usually on the output.

Edited by pfrederi

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Retired Wrencher

Thanks, Paul I’ll look into that. So 20 A would be too high.

Edited by Retired Wrencher

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pfrederi
4 minutes ago, Retired Wrencher said:

Thanks, Paul I’ll look into that. So 20 A would be too high.

Not a problem the regulator (if it is working)  will limit the output to what is necessary to charge the battery.  If battery was really low a 20 amp genny would just charge it slightly faster than a 12 amp

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Retired Wrencher
Just now, pfrederi said:

Not a problem the regulator (if it is working)  will limit the output to what is necessary to charge the battery.  If battery was really low a 20 amp genny would just charge it slightly faster than a 12 amp

I would like to find what out what original switch was for amperage.

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squonk

To START an engine you're looking at close to 80 amps to get things rollin and about 50 amps to keep it crankin. I tested an 8 HP on my engine stand with a clamp on ammeter. Charging amps are much less.

 

Stock HD switch without using a solenoid

 

https://wheelhorsepartsandmore.com/product/4988-7263-starter-generator-key-switch/

 

Wheel Horse Parts and More

Edited by squonk
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Handy Don
35 minutes ago, squonk said:

To START an engine you're looking at close to 80 amps to get things rollin and about 50 amps to keep it crankin. I tested an 8 HP on my engine stand with a clamp on ammeter. Charging amps are much less.

This makes perfect sense, thanks!

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ri702bill

Best to add a solenoid to take the heavy current out of the switch......

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953 nut

:text-yeahthat:  Use the much more affordable 103990 ignition switch and a solenoid.

5b202ef98cc34_wiring-starter-generatorwithbatteryignition.jpg.24ab0ca0cab6d9b8f7d7ffb2a7a42fbc.jpg

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