24v Starter motor, does it matter which?

[Meathead316]

Hi

DC motors are very expensive! I have seen electric carts and bikes on youtube with lots of power using 24v starter motors. Does it matter which type you use? i have found these:

http://www.ebay.co.uk/itm/95-MAZDA-...arts_Vehicles_CarParts_SM&hash=item3cc9842f39

http://www.ebay.co.uk/itm/01-05-MG-...arts_Vehicles_CarParts_SM&hash=item45fbb28569

http://www.ebay.co.uk/itm/ALFA-ROME...arts_Vehicles_CarParts_SM&hash=item41692dbe23

Are they what im after? If not can you point me in the right direction (links to uk supplier only please, which makes it 10x harder!)

 

[Bluethunder3320]

those would work but im pretty sure they are 12 volts. the 24v thing means 24 valves in the engine. it makes sense because all those came from 6 cylinder engines, and if you have 4 valves per cylinder then 4x6=24.

 

[buddyochoa]

Yeah, they are from a 24V V6. All passenger cars are 12 volts that i'm aware of. (Exempting the old 6 volt systems of course)

 

[Meathead316]

aaahhhh yes that does make sense, i did wonder why them cars would have a bigger battery...

is this what im after:

http://www.ebay.co.uk/itm/MERCEDES-...arts_Vehicles_CarParts_SM&hash=item2c64f7faa2

and is it a case of just hook it up and jobs a goodun, or do i need to do things to it first?

also how hard will it be to remove the pinion gear and replace it with a sprocket? or, could i not leave the gear on, and then get the appropriate gear the starter motor would normally mesh with and attach it to the drive axel/rear wheel of my kart?

 

[Skalabala]

I would say you want something like this
http://www.ebay.co.uk/itm/24v-CA45-Truck-Starter-Motor-Leyland-ERF-Foden-/290779671470?pt=UK_CarsParts_Vehicles_CommercialVehicleParts_SM&hash=item43b3d1abae&_uhb=1#ht_500wt_1203

 

[anderkart]

Yes that ebay starter that Skalabala posted the link to would be MUCH easier to instal a chain-type drive gear on. Simply because it's designed without a nose-cone bolted onto the front, and the armature has its support bearing/bushing built into the motors housing, instead of a nose-cone.

You can operate any 12-volt starter motors on 24-volts. They will develop approximately twice as much power, and more rpm, but they would also overheat and destroy themselves MUCH faster than at 12-volts.

It might be wiser to run the stater motor a 12-volts most of the time, and then devise a way to switch it into 24-volt operation only when you really needed/wanted extra power for short periods of time. (like just for 5 or 10 seconds)

But when using any starter motor to power a kart, you'll want to just ride it for short periods of time, and then let the motor cool off for awhile. (even at 12-volts) Because these DC motors dont have provisions to cool themselves, they're designed to just be used for a few seconds at a time, their not designed for continues-duty use like most all 110/230-volt A/C voltage motors are. So they will typically overheat, and start melting the copper/solder from the spinning armature (inside) after just a short while of riding your kart. (especially at 24-volts!)

 

[dman]

anderkart , whats a good dc motor for like all day use ?