I read another post about jump stating a Seadoo and just want to make sure of something... I found a Seadoo for sale in my price range but the owner said it has been sitting for 2 years and it needs a new battery (was serviced and ran good before it sat). Can I safely jump start it with a car battery to see if it will start if I leave my car turned off and have the negative cable disconnected? Thanks for the help in advance..