Battery

[Talltree]

battery tests 13.2. Machine does not start. Only buzzes. Replaced battery, engine starts. Why?

 

[ILENGINE]

Because it wasn't a battery issue, It was a loose connection or terminal corrosion issue that got resolved when the wires were removed from the old battery and connected to the new battery.

 

[GrumpyCat]

Voltage does not start engines, current does.

 

[Mark H_NO]

2 good answers. Poor connections may show full voltage, but can't pass full current. In a case like this, it's always good to clean the battery connections. Back when I used to drive much older cars, that was always one of the first things to try for weak cranking...

 

[GrumpyCat]

A bad battery can show full voltage yet not source sufficient current.

 

[Skippydiesel]

!2v systems require very good earth/ground return to work effectively. Keep all connections clean & tight.

All my 12V started equipment, has an additional earth wire from battery negative (-) to the engine crankcase. If lights or other systems are involved, I run an earth wire to them as well. Very rarely have a roblem.

 

[Douglas Lee]

Yup, you cleaned the conductors when changing the battery.
Must have a good clean mechanical connection first.
Doug Lee
*

 

[Gym123]

battery tests 13.2. Machine does not start. Only buzzes. Replaced battery, engine starts. Why?

TEST, don't just replace! Have the battery load tested, not just a simple volt test.

If you don't tighten the bolt on the cable, it becomes loose, corrodes and loses contact, as others posted. If you did tighten it, do you leave the cables on and float charge it during the off-season? Better to disconnect at least one and use the float charger, then clean the clamps/ends the next time it's needed.