See post #2 on this.---Based on the wiring it is a 1995 or older !!----Some will argue.----These motor often suffer from broken piston rings.----I do not have enuff fingers and toes to count how many engines have failed because of that fact.
I remember a knock on the door years ago.-----I was on a " party line" with a few other folks.-----I was asked whether my phone was in order.-----Folks heard a dog barking on their phone.----My dog let them know it was my phone upsetting the system.----Somewhat embarrassing.
I heard someone moved there many years ago because it reminded him of Scotland.----Your compression values are not encouraging to me.----I would install some factory plug wires.-----The ones on there are way too long and look wrong to me.
The wiring tells me it is a 1995 or older.-----If you just bought it , post the compression test values.----Install a new impeller before your first venture out into the ocean.-----Not sure about those plug wires either.----Are they wire core ?