Boat won't idle

Assuming that it idled OK before you took the rear bowl off, transferred parts and replaced it, there's a good chance that your problem is in the rear bowl.

Take the flame arrestor off, look down the throat of the carburetor while it's running and if you have lots of gas going down the venturis especially the secondaries since that's what you worked on, then you probably don't have the float adjusted right and it's allowing way too much gas into the secondaries.

Just like you describe, it'll run in neutral at higher rpm's and as soon as you back it down to idle there is way to much gas going in and it floods.

It may continue spilling gas into the venturis for a short time after it is shut off

There's a gasket that goes between the screw in seat and the body of the bowl, hopefully you have that in place or you'll get fuel leaking around the seat instead of going thru it and even if the float is adjusted right, you'll be flooding.

its possible that the gasket fragments got in there... back flush with spray carb cleaner or compressed air.   Likely that your float is mal-adjusted though... I would follow KENO's recommendations.   He knows his stuff.   improper torque, missing gaskets, broken gaskets can all cause big issues. There was another recent post similar to this where the problem was a missing o-ring.    Get back in there, open up the problematic side, re-adjust the float to shut the fuel flow off when the float is perfectly parallel to the bowl side. Check to make sure that the fuel flow shuts off (7psi max) when you close the needle/seat valve.   I use my mouth for this so I don't have new problems after checking. Pictures may help, you might not catch missing parts if you're not familiar with the interworkings...

Bchboy33 wrote:    This carb does not have an adjustment for the float so I just left it alone.

Glad it was just junk in there.   that's a good outcome.     There is an adjustment on the float, you just have to bend the tab to make it hang down further, or less, depending on what the float is doing.   If you experience more trouble, try blowing it out again, and check the float level. float levels are critical to proper operation

Dreaming wrote: Bchboy33 wrote:    This carb does not have an adjustment for the float so I just left it alone. Glad it was just junk in there.   that's a good outcome.     There is an adjustment on the float, you just have to bend the tab to make it hang down further, or less, depending on what the float is doing.   If you experience more trouble, try blowing it out again, and check the float level. float levels are critical to proper operation

If you ever need to adjust the float level, just read what Dreaming said

That's how you do it on your carburetor

I think Dreaming knows his way around a carburetor pretty good these days

By the way "carburetor" is French or some other foreign language for "keep me clean or I'll give you fits"