p24-1953 Posted August 18, 2020 Report Share Posted August 18, 2020 I have a slow crank condition on the 40' but I thought yall could help. Symptoms: 1) Extremely slow cranking even thought I am using a 1000ca optima battery ( new) 2) battery cables get very hot after starting. It will start it just takes 5 or 10 secs of cranking. Timing is set to 4btdc ( set it to 0 and made no difference) The battery is well grounded. Bypassed the Selinoid by touching cables together and still supper slow. The cables look to be the right size, but not sure. Are all signs leading to undersized battery cables? Quote Link to comment Share on other sites More sharing options...
greg g Posted August 18, 2020 Report Share Posted August 18, 2020 Cables should be zero gauge. 6v hates resistance both power in and ground side. Make sure up to snuff. Sometimes ovaled armature bushings will allow the armature to drag on the field coils slowing spin rate. This is fixable but do the cables first. If things don't improve then check the bushings. 1 Quote Link to comment Share on other sites More sharing options...
plymouthcranbrook Posted August 18, 2020 Report Share Posted August 18, 2020 (edited) Also make sure your grounds are clean and tight. I suggest as others here have that you put an extra ground from the engine to the frame to be sure of a good ground. Edited August 18, 2020 by plymouthcranbrook Quote Link to comment Share on other sites More sharing options...
48 plymouth Posted August 19, 2020 Report Share Posted August 19, 2020 On 8/17/2020 at 10:10 PM, p24-1953 said: I have a slow crank condition on the 40' but I thought yall could help. Symptoms: 1) Extremely slow cranking even thought I am using a 1000ca optima battery ( new) 2) battery cables get very hot after starting. It will start it just takes 5 or 10 secs of cranking. Timing is set to 4btdc ( set it to 0 and made no difference) The battery is well grounded. Bypassed the Selinoid by touching cables together and still supper slow. The cables look to be the right size, but not sure. Are all signs leading to undersized battery cables? Quote Link to comment Share on other sites More sharing options...
48 plymouth Posted August 19, 2020 Report Share Posted August 19, 2020 Just now, 48 plymouth said: 00 cables Quote Link to comment Share on other sites More sharing options...
martybose Posted August 20, 2020 Report Share Posted August 20, 2020 17 hours ago, 48 plymouth said: 00 cables +1. If the cables get hot I don't care what they look like, they are too small. Marty Quote Link to comment Share on other sites More sharing options...
kencombs Posted August 20, 2020 Report Share Posted August 20, 2020 I have seen more than one set of custom cables with the lugs not crimped correctly. They will get hot just like a loose bolted connection. Worth a look. Quote Link to comment Share on other sites More sharing options...
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