carb tuning....

[cocacola]

just got back my carb from rebuild from PWC Muscle (great job)
darn lakes are flooded, so no water testing yet.

engine fires instantly and idles well (great)
I thought I would check throttle response and rev it a little while on trailer.
It bogs when I try this...
It gets better as it warms up and wondering how water testing will go.

My gut tells me it's a tiny bit lean.
Does this sound right?
Thinking about making a 1/16 or 1/8 turn on high speed mixture.

Please give advice
(I am old guy who bought this to compliment our family boating)

 

[noviceskier]

put new plugs in, hs is closed on my stock 720

 

[cocacola]

How did you know this is the only thing I have not done?
You are so right...thanks for the reminder!!!!!!!!!!

 

[mikidymac]

It will bog a little as it is getting all the air out of the system.
Don't touch the high speed screws as they have nothing to do with how it runs on the trailer. At this point you need to get it in the water to know anything more.

 

[cocacola]

perfect
thanks

 

[cocacola]

Finally getting Seadoo back in water and Summer is almost over.

New plugs added after PWC Muscle carb rebuild.

I see so many needle settings online…



Mine are set at 1-1/2 low and 1 high.



One more thing….

I used to notice water weeping on top of engine. After removing water jacket, there were no o-rings around spark plug holes. I ordered a kit and changed all upper seals except for removing cylinder and doing base gasket.



Seadoo ran better than last time, but still bogs when giving full throttle.

Faster than before, but probably only 20mph but I could apply more throttle than before.

I read online where some guy slightly choked engine when running like this.

WHOW! It took off like a rocket, but soon died because I choked completely.

Tried it again about 1/3 choke and I was hauling butt….full speed.

Engine was screaming fast and I rode it a lot.

Not good to drive a PWC with one hand on the bars, so I limited this plus sought smoother water.

Then I pulled over to shore, adjusted choke cable and was running fast with 2 hands on the bars….lots of fun for sure.



Previous owner had removed stock air cleaner, so I am thinking that the less restrictive intake is making this thing run so lean and that’s why I have to apply some choke to give engine enough vacuum to draw more fuel into engine. How does that sound? It has a K&N style air filter.

I have noted another needle setting online of 1-3/4 on low….but it’s the closed setting on high that makes me suspicious.

Need input and suggestions.

I can ride it as is, but unsure of who things are set up.