The exaust just goes down the shaft and out into the water. When I rev in idle the exaust increases significantly and seems ok.
Yep that's the engine. 2 Stroke. Sorry for leaving it out.
Yes I'm pretty positive I checked that jet. It's the one that goes down through the donut float and is what sucks gas up and into the engine right? The little cup shaped nozzle on the end screws off and I checked it.
Again the carb is basically brand new and looks it. I havn't found anything that looks wrong with it whatsoever and have now blown carb cleaner through everything. The actual problem it had was with the float switch, which wasn't closing.
That does seem to finally be fixed. First I bent the float arms a bit so it would close the valve with more force. Then after my throttle problems I double checked the height of the arms against the service manual and ended up bending them back a bit.
I could believe that if not enough gas was in the bowl it might struggle at higher loads, but now it's behaved identically with two different adjustments of these arms.
I did make an adjustment to the clip on carb needle which sets rich/lean. It was on the 3rd setting (rich I think) instead of the factory suggested 2nd setting. This was before my 2 hour trip but after I had done some test runs and noticed that the engine might not be running at full power. This adjustment didn't seem to produce any difference.
ok most carbs have a specific float height...usually parallel to the float bowl edge...
also did you move the clip up or down...if the clip goes up effectively you are leaning out the mix if you go all the way down it will allow max fuel flow
so your stalling out at this point in time can be due to either an extreme lean condition or a too rich condition..both can stall out an engine...
a lean condition will usually be heard by revs hanging then dying
an overly rich condition will stall out after doing an idle skip if you will from full throttle in other words it will dip then go back up and then die...
this is in general terms...which one are you experiencing? when you give it full throttle can you acheive it sometime or will it always die before? or can it run at full throttle a bit then die out?
do you have a shop manual or better pics so we can see?
you might be starving the carb of fuel when giving it full throttle...regarding the float level tab you bent
start always and diagnose one thing at a time
only do ONE adjustment at a time...
once you do a jet change, change float level and mess with the needle there is no way you can find out where your problem is...
start with stock settings and adjust one thing at a time