I have a 10,000 lb. boat with dual Volvo outdrives that are 1.89/1 with 14 by 15 props.
Would electric motors work here?
Yes. Jack Knopf in Texas has built this yacht conversion with a 12 HP electric motor using 72v or so. He says acceleration is "slow", but his boat is considerably bigger than yours (20K lbs.), and he's apparently only got one motor.
On this upcoming Saturday, November 9th, a transport truck and trailer will roll into Kingman, Arizona from Los Angeles, California to pickup our very rare circa 1959-1960 Henney Kilowatt with only 40…