fishstix, i fish on my friends boat and at times the both motors, main and 9.9HT yama, never had a problem. i personally run two seperate
electrical systems, i have everything i fish with wired to my 9.9HT yama
downriggers,fishfinder ,fishhawk, radio etc. has its own battery etc. the
boat is wired as it was when i bought it. doing this for 12 yrs , even run
two seperate fuel systems, portable tank on swim platform for 9.9. never
had a prob.
john