1987 Kawasaki JS550 Carb and porpoising questions

[x7drvr]

hello, i just bought a 1987 Kawasaki JS550 jet ski, and i have some questions about the carb. there's 4 adjustment screws, and i know one of them is the idle adjustment, but i'd like to know what the other 3 are. which one is the low end adjustment, and which is top end?
what are good settings for these screws too? i've tuned sleds, quads, and bikes all my life, but this is my first jet ski

here's some pics of the carb-
is #1 the top end, and #2 the low end?




also, the jet sk really starts boucing around 20 mph, and you can't go much faster without feeling like your going over waves. if i put my weight over the front a bit, it stays flat and will go to full speed without porposing. is there a way to adjust the jet so it points a little downward? or should i just put weight in the front or something?
thanks!

[Technical Support]

Re: 1987 Kawasaki JS550 Carb and porpoising questions

1 = high 2= mid 3= low the low can be set around 1-1/16 out, the high can be set at 7/8 turns out, you could try 1/2 out on the mid. These are all approximate settings and you should do a plug check to verify how the ski is running , if you have it set too lean you will damage the engine so use these as a base to start at and go from there, but check the plugs to make sure these setting are good for your ski.