Yep... I'm 99.9% confident that's it. Because I've dealt with it on the last 2 sleds after months and months of troubleshooting and racking my brain.

Right now I have 17' of 2/0 battery cable running from the batteries to a post in the rear. Overkill... not for a modern DI 2 stroke. Everything else... slightly overkill.

Drifter, what size wires you got running from the batteries to stern? 4 gauge? Does your etec run really rough at idle and low rpms?