Generator help

[Richard_Schmid]

Hi, Quick question.

We have a Small generator at work. Single phase petrol jobby. The battery for the electric start has bust. We charged + tested the battery and no luck. Please corect me if i`m wrong,

It`s when the battery is under load (i.e when we actually push the button to start) that we need to test, to see whether it can keep it`s voltage. Will there be any drop, and if so, what is an acceptable (roughly) voltage drop. It`s a 12v battery.

By the way, we are pretty sure it`s the battery thats gone, as it also has pull start, which works fine. I don`t think the generator has a changing system for the battery, although it would make scence to have an alternator there..anyway.

Thanks in advance.

Richard

[finpos]

It's just about impossible to tell - Yes, there will be a drop, but even with a proper tester (which loads up the battery for you) it's along the lines of "that doesn't look good". If the battery is a couple of years old accept it's stuffed and buy a new one

The generator will certainly charge it's battery. Either it'll be a 12V generator which uses an inverter to give you 240V, it which case it'll to tap off some of that, or it'll have it's own charging coils.

f.

[aero]

There will definately be a drop in battery voltage when its cranking the engine. What it will be is anyone's guess. It won't drop below about 9 volts at a guess, if it does it won't have enough power to hold the starter solenoid closed.

It will have a charging circuit for the battery.
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70's & 80's 4 stoke Yamaha Guru and professional workshop dweller.

[Richard_Schmid]

Nice one guys.

Thanks for the help.