1990 Johnson Evinrude "ES" 40 thru 55 Service Repair Manual, P/N 507872, Page 239Get this manual

1990 Johnson Evinrude "ES" 40 thru 55 Service Repair Manual, P/N 507872, Page 239

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Battery Cable Extension Minimum Recommended Gauge
All batteries should be of heavy duty, marine constructionThe battery must be vented, refillable typeA battery that is not fully charged or less