Had slow cranking on our RV. It's a Ford V10 with permanent magnet starter and GP 65 battery. Battery's old and I thought it was a goner. Would crank the engine cold but not hot. Cleaned terminals and put CP or whatever that purple goo is on the cleaned areas. Been cranking Cold and Hot since... So a good cleaning might pay off for you. Also, be aware the cables CAN (but not all that often) corrode inside the "sealed factory" terminals. That's why a Voltage Drop Test is good. I don't know where you are, Friday, but here in FL right now I can about start mowing from one end about the time I finish the other end. And we're only on a Quarter Acre!!!