King Demon carb help please. Jet sizes?
04-20-2017, 12:42 PM
#1
Junior Member
SHOW GUEST
Thread Starter
Join Date: Apr 2017
Posts: 2
King Demon carb help please. Jet sizes?
Running a 28 ft. catamaran with 622 Chevy Tall deck 14-71 Moonyham Blower with twin King Demon 1095CFM carbs. She runs great but blows black fuel soot all over back of boat. It has .90 main jets in it. looking to lean it down without burning a piston. Any help would be great.
04-21-2017, 04:20 AM
#2
Senior Member
RACING JUNKIE
Join Date: Feb 2004
Location: KIEFER, OK.
Posts: 1,312
If it were me I would step down 2 sizes at a time until I started getting close. Then you can start working to the point of being able to read the plugs for jetting. Just don't load the engine super hard after a jet change. I have never tuned in a boat, but this is how I would approach it.
Curtis
Curtis
06-03-2023, 07:29 AM
#4
Member
MASTER JOURNEYMAN
Join Date: Jan 2023
Posts: 44
you can start working to the point of being able to read the plugs for jetting. Just don't load the engine super hard after a jet change.
Last edited by annamarks; 06-03-2023 at 08:45 AM.
