How Many Amps Does A Diesel Starter Draw. If the problem is intermittant you may want to check all connections. High amp starter cables should have less than ½ volt drop.
High amp starter cables should have less than ½ volt drop. On average they draw between 300 and 500 Amps for average sized car engines 2 to 3 litre while on truck engines the current could easily reach 1000 Amps at initial turn over. Starter amp draw will be high until the starter motor reaches maximum RPM Cranking longer than 10 or 15 seconds.
So when cranking you will likely put out about 10 volts and up to 400 Amp draw from starterthe reason you need 1900 CCA is because at minus 30 C that becomes about 1100 available Amps or less.
Tester shows 1120 cca when both are hooked up to the cables in parallel. Diesel engines have a very high compression ratio eg. We have been advised to install a SLOW-BLOW fuse in this circuit. They have a glow plug type devise that needs to be heated with electrical power to start the combustion process.
