Battery mixup 2003 EzGo

[Wisedm]

Just obtained a 2003 EzGo textron, when I first looked at the batteries I looked like all were 8 volts ( 4 caps), but upon further review I noticed that 2 of the batteries had 3 caps ( 6 volt). The 8 volt are Trojans but not sure what the 6 volts are, they are all painted black. The person I bought it from is not the original owner so he has no clue why they are like that. The charger is was given is a 36 volt and the motor looks like the original(spicer). I'm sure this is no way to operate cart but not sure which way to correct this situation.

[scottyb]

In 2003 Ezgo made Series and PDS drive carts. You need to know which one this cart is. If it is series it could run on 48v with 6/8v if you had a 48v charger.
If it is PDS you can not run on 48v without an upgraded motor and a charger.
Either cart will run on 36v. So - first thing to do is to determine which batteries (if any) are good enough to build a new pack around. You can not run a mix of 6 and 8 volt batteries

[Wisedm]

It is not PDS system it has the F-R handle under the seat

[Wisedm]

So, if I decide to go with the route of using the 6 volt batteries and completing the bank for 36 volt, what other component do I need to upgrade. I plan on using cart on mostly level ground at my country home, but there are some hills. I want to put a 5 or 6" lift with 22 or 23" tires on cart. My current motor is a "Spicer" Part # 73124G02 (36volt), Controller is a Curtis (P/N 25864G02) and solenoid is a white-rodgers 5F coil-36 volt. On the other hand what will be needed if I go with the 48 volt system.