Jerry Hickey
Recruit
- Joined
- Sep 6, 2003
- Messages
- 5
I'm new to the forum, and could sure use some advice. I've got a 1987 34' bayliner with twin crusader 454's 350 hp. Boat idles and runs fine for about 8 hours then engines start backfiring, sometimes both, some times only one, starts to lose power. Change spark plugs and it runs great for about another 8 hours, then same thing. When I remove spark plugs the colours range anywhere from white to brown to black and sooty. Engines have about 1300 hrs.