How long are your battery cables?I ran 2 gauge on mine.They were about 18 feet long and had no problems.If you can,find some welding cable to use instead of regular battery cables.The copper strands in the welding cable are alot finer and there are more of them.Electricity doesn't flow thru a wire,it travels on the outside of the conductors.Strange but true.The more individual strands the lower the voltage drop.That is why cars can get away with such high loads on smaller stranded stranded wires,whereas the wiring in your house(solid conductors)have to be so much larger in diameter.I had a problem with a hard start condition one time and found that the terminal on the solenoid that the battery cable hooks to was loose on the solenoid itself.Big voltage drop there.