Midlake Crisis
Site Supporter
- Location
- Bakersfield, CA
Will jump starting a Superjet w/ stock ignition off of a car battery hurt anything?
Super Jet Jump start off car battery?
- Thread starter Midlake Crisis
- Start date
- Location
- Largo, Fl
Fire it up!
WaveDemon
Not Dead - Notable Member
- Location
- Hell, Florida
I think the car is supposed to be off, but I've jumped off of a car battery plenty of times.
- Location
- Largo, Fl
Spoken like a true Floridian (you know I mean no offence), anyone that has jump started a vehicle in cold leaves that sucker running.....
I have jump started plenty of skis off of running cars.
Midlake Crisis
Site Supporter
- Location
- Bakersfield, CA
Thank you sirs. Fire in the hole tomorrow!
WaveDemon
Not Dead - Notable Member
- Location
- Hell, Florida
c'mon gordie, I know to keep the car running when jumping another car. it may be total bs but I've read that the voltage coming from a running car could be too high for the ski electronics.
have you ever killed a car battery from starting a ski? I haven't.
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Tyler Zane
Open Your Eyes
- Location
- Panama City Beach, FL
its totally not necessary to have the car running, but will not hurt it, unless the voltage regulator is going bad in your alternator.
once i jumped a 550 off of a f250. i had never heard it turn over so fast lol
once i jumped a 550 off of a f250. i had never heard it turn over so fast lol
theiba
Can't get a ski stuck...
- Location
- Southern NJ
Like tzane said, unless the alternator in your vehicle is kicking out 16+ volts, it won't hurt it... but then you've got more important stuff to worry about like your car battery getting cooked.
Wouldn't be any different then leaving your ski on the charger in a bulk charge rate which is usually about 14.4v and hitting start.
snowxr
V watch your daughters V
- Location
- Waterford, MI
I replaced a guys yam cdi after he jump started it off a boat.
Its not the voltage that gets you, it is the amps coming off the alternator
Jump it with the car NOT running and you will be fine
The amount of current the CDI draws is determined by the CDI, not the running car's alternator - it cannot force more amps into the system than it needs, unless the voltage is higher.
More power dissipated as heat = an already weak CDI can pop.
- Location
- Largo, Fl
x2...
Midlake Crisis
Site Supporter
- Location
- Bakersfield, CA
Jump it with the car battery with the car off or not?
theiba
Can't get a ski stuck...
- Location
- Southern NJ
My F250 has dual 200a alternators and I've jumped my ski enough times that I actually put a jump-plug on it.
And I always do it right as I'm dropping the ski in the water with the truck running. Like Matt said, the device is what generates the load draw (amps). If the voltage of my truck battery is 14.4v, and that is what the voltage regulator is programmed to achieve, technically the output of the alternator will be zero. Combined with the vehicles battery taking the hit of the ski, it's not like this huge surge happens when you crank the ski over, especially if you hooked it up and let it charge for a minute or two before you started cranking it.
If the CDIs are really that susceptible to overvoltage, then I'd be careful of starting them too right after you take the charger off since most chargers bulk charge at 14.4v like a vehicle does, and float charge at 13.2v-13.6v. I'd agree again with Matt that more likely you're seeing a weak CDI pop, and the stress of jumping it is what did it, and may or may not have done it if the car was off.
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