Louznmemind

It is the plunger type, where exactly would the rubber seat/seal be? There's a plastic cylinder/plunger that goes into the choke hole, if you look down into the plunger hole there is nothing but a smaller hole in the bottom. I've not tried that process with the fuel valve so I'm not sure.

Considering this is the first carb of this type I have dealt with and the po obviously left at least one piece out, I'm not sure. The seat I took out of it had a tiny rubber o ring that sealed(?) when it was threaded into the carb, it broke in half when I took it out, the new one has an equivalent size metal washer. I do know the needle and seat are identical to the ones that came out of it otherwise. The kit came with the machine and I just assumed it was correct. (Possibly a bad assumption?)

This thing is definitely testing my patience. It's definitely a flooding issue, if I drain the crankcase and leave the drain plug out, it starts first push of the button and idles just enough to keep it running for maybe 15 to 20 seconds. When I put the drain plug back in, it doesn't want to start and won't idle. When I take the drain plug right back out, it has gas in it again. Petcock is new and is working fine, it's only flooding when I try to start it and keep it running that it fills the crankcase.

I guess that's my next route, went through the carb again yesterday. I set the floats from what sparce info I could find on YouTube and still have the same issue. Definitely a learning experience...

I appreciate the info, I should be able to mess with it again sometime tomorrow. This is the first time I've ever seen the floats made into the bowl and it's thrown me for a loop for whatever reason but I'm not giving up.

I promise I'm not a mechanical moron but this thing.... Thanks everyone for your input, I'll be using it all. Got carb back on this morning, no difference. Still starts only with throttle held wide open and will not idle. Pulled the crankcase drain bolt and drained about 3 bottle caps of gas. I left the drain bolt out and went to crank it just to see if everything drained, it started right up on its own and idled extremely low off just the gas in the carb bowl. Put the drain plug back in, hooked up a fuel source, and again it would not start without holding the throttle wide open and would not idle. Pulled the drain plug again and got about a cap full of gas. The carb is also shooting a mist of gas out the back of the carb when I keep it running.

Took the carb back apart today and literally cleaned every single piece and every passage, I'm more confident now than the first time I went through it. The pilot jet has a hair thin obstruction inside that would not come out, not exactly sure what it is but I replaced it with the new pilot jet. First time I did not take the slide apart and pull the jet needle, when I pulled it today I discovered the plastic washer under the clip was not there. I'm not sure what that affects exactly but I put the new one on it from the kit. Also found the new check valve on the carb overflow tube was clogged, is that check valve necessary? Is 100 psi acceptable on the compression test? As far as setting float level, I can't download any manuals until I get to 10 posts but I'm hoping I at least have it in the ballpark. I've checked and not found any manifold leaks. I'll be getting it ready to start in the morning and see what happens....

Alright y'all, compression check shows 100 psi and it holds it. (tested with carb both on and off the machine) As mentioned, it has been bored .30 over, it was bored before I got it and supposedly didn't have a lot of ride time afterwards but I can't say how fresh it is. Seems it should be a bit higher from what I've researched but I really don't have a clue. As far as float adjustment info on this forum, I haven't found it yet but also haven't had a lot of time to look. As far as the jet needle, it appears to be factory 169 and is set on the 3rd slot from the top (as it was when I got the machine). Pilot jet is factory #40, and main jet is factory #155

Fuel was mixed by me and is fresh, also replaced Fuel lines, tank was empty when I got it. I have not checked compression but will definitely do that. I've checked the Intake connection and found no air leaks. I'll recheck the idle mixture screw because it's definitely not changing anything and I'll see if I can find the download for the float adjustment. Thank you, this thing is testing my patience.

Newbie here from just outside of Nashville Tn. Born and raised here. Just recently acquired a 97 Polaris Express 300 and trying to learn this crazy thing. Watched YouTube so much I have confused myself, hoping to find some firsthand info from a community of ATV'ers rather than half informative videos, lol.. Glad to be a part of the forum!!

Howdy all, new to the forum, forums in general, and 2 strokes altogether. I have a new to me 97 Polaris Express 300, it has been bored .30 over, running 40.1 premix, oiler lines are blocked off. I admit my ignorance of 2 strokes and I'm Louznmemind with this thing.... I cannot get it to start without holding the throttle wide open and it will not idle on its own no matter what I do. Once I get it started I have to hold the throttle slightly open to keep it running, it will go into gear and SEEMS to run good all through the throttle range, it screams at WOT but when you let off it wants to bog out, it will keep running if you keep bumping the throttle. The carb has been taken apart and cleaned although it looked brand new inside when I took it apart. The main issue it had when I got it was it would pour gas out of the overflow as soon as you turned on the petcock, I replaced the petcock and adjusted the float height, I also replaced the float needle and seat but I'm not sure I have the float height correct. Is there a process to adjusting the float height considering it is made into the float bowl? Could this be my issue or should I also look elsewhere? I have tried adjusting the air screw to no avail, even at 1/8" intervals but the idle never changes at all, what is the default setting for this screw as well as the idle screw? I apologize if this is confusing or if I missed giving any necessary info but I will do my best to clear anything up if someone could please give me some advice.