Starter Motor

[justinaron]

Could you reverse the way a starter motor on a briggs and straton works? You know like instead of using power it outputs power?

[CritterBuddy]

Unfortunately, no.

[justinaron]

Could you hook up a generator or something? I have a old house security battery that holds a charge but I want to be able to put power back in the battery without charging it. :dizzy:

[Mike Bean]

Your need an engine that has a stator under the flywheel to produce the charging current.

Mike Bean

[justinaron]

Could I somehow mount a old car alternator? Or does anyone know of some type of mini alternator I could use? Anyone got any neat Ideals or upgrades or addons that I could put on it? It has a 3.5 HP briggs and stratton. I just redid the seat and fixed the trottle and put handbars on it. Could I put big ol riding lawn mower tires on it? :cheers:

[CritterBuddy]

Okay, wait a minute.

Did this B&S motor have a starter originally? If it did then you probably already have a charging system built into it to help keep the battery charged. If it's not keeping the battery charged then there is something wrong with the charging system. If you added the starter then you're out of luck.

I doubt if the old house security battery will work. These batteries are considered deep cycle batteries but I believe they are very low amp hour and probably will not start your motor.

Trying to add an alternator or generator to the motor is probably not a good idea as it would rob you of most of the power the motor will produce resulting in you not being able to go very fast.

Adding lawn mower tires to the BSR is your choice. Part of the fun of building a BSR is you can individualize it to your liking.

[justinaron]

No it didn't orginaly have a starter. Would a scooter battery or home security battery be good enough to run a front light, rear light, and a horn? :thumb:

[CritterBuddy]

All electrical components have a wattage rating. The formula you need to determine the battery size is: wattage / voltage = amperage

For example - if you are trying to run a 12 volt headlight that is rated at 55 watts: 55 / 12 = 4.58 amps This means you would need a 12 volt battery rated at 5 ah (amp hours) to run the headlight for about 1 hour.

Now let's add the tail light rated at 20 watts: 20/12=1.67 amps So to run both the headlight and tail light for about 1 hour you would need a battery rated at 6 to 7 ah.

Get the idea of how to do this?

[justinaron]

Ok got ya How do I know the rating on the battery? What is the rating on a car battery verses a scooter battery? or motorcycle battery?

[CritterBuddy]

A car battery will be hard to figure out as their ratings are in cold cranking amps since they are designed to supply a huge amount of power for a short period of time. To find the amp hours of a battery, enter the model number of the battery in google and check out the resulting links.

[Swint]

Could I somehow mount a old car alternator? Or does anyone know of some type of mini alternator I could use? Anyone got any neat Ideals or upgrades or addons that I could put on it? It has a 3.5 HP briggs and stratton. I just redid the seat and fixed the trottle and put handbars on it. Could I put big ol riding lawn mower tires on it? :cheers:

This a hot rodders trick my grandpa showed me but, put a pulley on your axle and run a belt from it to the alt. It'll work just the same as it does on the engine, except it will only charge when your moving. With the low ground clearance of a BSR you may have to put a small pulley on the axle and a big one on the alt. for it to charge correctly.

:thumb: