so i checked the battery today.
engine off it sits 12.5v
engine on it registers 14.04v from idle to being reved. never goes above or below that.
is 14v enough to be charging?
when i have a charged battery (from a tender jr) starts great.
if i turn it off, then turnkey/lights back on (but no start)
the battery drain down to 10v in about 45 secs and then holds there in voltage but will not start.
this seems very quick to drop that much in voltage so basically I have seconds for a good start...no reserve.
this is a new battery (scorpion yt12 175cca) and replaced another battery that was a week old and was not starting.
any idea what is going on here? or what i should check next???
i'll take battery to parts store and do a load test just to confirm but i don't think it's a battery...something in the engine is causing a massive voltage draw.
Your battery voltage dropping to 10V in 45 seconds and staying there is a very bad indicator.
A lead acid battery is considered empty at 10.5 Volts, and your max. charging voltage should never exceed 14.5Volts.
Do you have access to another battery to try?
If I understand you right, you have a new battery in your scooter. Please consider that a brand new battery can be faulty too (partial internal short). Rarely but it's possible. I know from experience.
If you want to thoroughly check your battery, to rule that out of the equation, you need access to a computerized R/C battery charger. Using that charger try to fully charge your battery on the Pb setting at 1/10C rating. (for example: if your battery capacity is 10Ah then charge at 1A current) Then discharge the battery at 1/5C to 10.5V and see discharged mAh's. If you get less than 70% of the rated capacity out, then you can consider that battery dead.
