Whenever I start my C12, cold, I have to hold the boost button down while it is cranking. Even warm it turns over slow. My two cranking batteries are each rated at 850 CCA and less than a year old. When I test the batteries with a Midtronics tester the starting batteries still show 830 to 840 CCA amps. The only thing I can find that seems high to me is the total amps the engine/starter take while cranking cold, up to 1150 amps. I didn't test it but have to assume 90% of that is the starter since I don't believe they are using glow plugs.
Even when I link the starting batteries to the six golf cart batteries, the draw is strong enough it will reset my inverter on occasion.
Does anyone know what the starter/engine should draw when turning over at say 50 degrees? Is this a problem anyone has found a solution for?
The only good news is it hasn't changed much in 2 years and 30,000 miles.
Thanks in Advance