1996 Arctic Cat ZRT 600

[snowmobiler]

I have a zrt 600 that has been sitting for a few years. I cleaned the carbs, gas tank etc and bad thing is choke plunger is stuck in carbs and will not move, which then takes forever to start. any ideas how to get them free up and out? Second question the clutch and exhaust side are firing and sled will run, but the middle cylinder will not. plug is soaked with fuel. I cleaned that carb again and same issue. all have spark. the compression is alittle low for my liking but its not low enough that it wouldn't fire up. Would the needle be the issue and buy the rebuild kit for that part? im stumped and can not figure it out. thanks for all the help.

 

[rmk4ever]

Most likely needle & seat on middle, get a genuine mikuni needle & seat. Plungers might need a little heat, but you'll probably melt the o-rings. Make sure to remove all old gas. Good luck, let us know how it turns out.

 

[snowmobiler]

Most likely needle & seat on middle, get a genuine mikuni needle & seat. Plungers might need a little heat, but you'll probably melt the o-rings. Make sure to remove all old gas. Good luck, let us know how it turns out.

do you know part numbers or where to get mikuni parts at? we have no arctic cat dealers in the area. I have seen the parts online last night but it does not say mikuni need and seat specifically

 

[dofo1]

If you don't want to chance getting the enrichers unstuck you could add a primer, that's how we rolled back in the dark days'

 

[snowmobiler]

where do you suggest to get a primer at. I saw one on Dennis kirk but it said I have to get new carb flanges to hook the lines up. can I cheat it some how? im trying to keep it low budget, I did order a new needle and seat

 

[reiley99]

where do you suggest to get a primer at. I saw one on Dennis kirk but it said I have to get new carb flanges to hook the lines up. can I cheat it some how? im trying to keep it low budget, I did order a new needle and seat

Your gonna be wasting your time putting primer on the until you get those carbs really clean go buy a gallon can of carb cleaner and take the carbs apart as far as you can and let them soak for a couple days then I bet you can get the chokes out.Then clean them again. Or you can find someone that has a ultra sonic cleaner to get the carbs really clean.

 

[warner]

what are your compression readings across all three cylinders? you stated a little low on the middle one? save yourself some time and frustration and take readings on the compression..

 

[dofo1]

where do you suggest to get a primer at. I saw one on Dennis kirk but it said I have to get new carb flanges to hook the lines up. can I cheat it some how? im trying to keep it low budget, I did order a new needle and seat

Your are right if your carb flanges do not have any sort of fitting on the side to the engine (look closely a lot of older sleds have a plugged fitting) than you would need to buy a new flange. I would not recommend trying to add one.

My idea to add a primer was not to solve any other problem but the stuck enrichers, you still need clean carbs and good compression. The reason that I suggested adding the primer is because I have seen people wreck a perfectly good carb trying to unstuck that enricher. I say if it is stuck and the seat is sealing leave it alone, if the seat is not sealing than you are out of luck.

 

[snowmobiler]

Your are right if your carb flanges do not have any sort of fitting on the side to the engine (look closely a lot of older sleds have a plugged fitting) than you would need to buy a new flange. I would not recommend trying to add one.

My idea to add a primer was not to solve any other problem but the stuck enrichers, you still need clean carbs and good compression. The reason that I suggested adding the primer is because I have seen people wreck a perfectly good carb trying to unstuck that enricher. I say if it is stuck and the seat is sealing leave it alone, if the seat is not sealing than you are out of luck.

well ill see what the needle and seat do, if that solves the fuel issue for giving it to much at one time. I did empty that carb and it did fire quick then sputtered out again, so im guessing its getting to much fuel. so if the new part fixes that then ill worry about the choke I guess before I spend anymore money. the compression Is about 90psi across the board. the sled has 6500 miles on it. having a Polaris I have about 115-120 psi so that's why I said its alittle low to my liking. thanks for the help im waiting on speedy to deliver the part and I will let everyone know how it goes

 

[snowmobiler]

ok same old news. all 3 carbs soaked for 2 days in carb cleaner. I put a new needle and seat in the middle carb. the choke is still stuck on all 3, haven't had luck with that issue yet. I checked the floats they do work. now I tried adjusting the needle up and down and nothing. I noticed the throttle screw on the side of the carb was all the way in and not the same as the other two. so I eyed it the same and still not even a small difference. while sled was running I unhooked the fuel line from the middle carb and pinched it so fuel wasn't going everywhere. now when I did that and the carb ran lower on fuel the middle cylinder fired up and did the exhaust check with hand and it got hot, now I rehooked up the line and it killed the middle cylinder again. Now tools and other stuff started getting thrown and I quit for the night. so any other ideas!!!!???. I was wondering would it be the fuel pump but pushing to much to that carb or no because they are all fed of that fuel pump? is there away to plug the choke on the carb incase it is stuck open a bit even know I cant get the plunger out. I just want to do this and see if that might be the cause. any ideas would be great thanks!

 

[warner]

swap carbs...take the middle one and move it to the pto side cylinder, if the problem follows that carb and moves to the pto cylinder i think you mave have a partially open choke barrel....you must pull that choke out of the carb, maybe the choke cable itself is stuck ? don't give up...keep going

 

[warner]

do you have access to a mity vac pressure/vacuum tester? take the suspected carb off and flip it over,let the fuel drain out..plug the pressure tester to the fuel inlet of the carb and pump pressure till the gauge reads 3-5 psi..the needle in the carb should hold that pressure..if it does your needle and seat are working properly, if the pressure gauge slowly drops to zero then the needle and seat is leaking air,meaning it will not seal and fuel will get into the crankcase

 

[snowmobiler]

swap carbs...take the middle one and move it to the pto side cylinder, if the problem follows that carb and moves to the pto cylinder i think you mave have a partially open choke barrel....you must pull that choke out of the carb, maybe the choke cable itself is stuck ? don't give up...keep going

Problem is I cannot get the choke out of the carb, I think if I bend pull etc and more I will break something. I don't have one of those tester. that's why I wanted to know if I can bypass the choke temporary to see if that's it. thanks for info though I will try switching them.