The cable running in the top of your carb is your throttle cable and the lower cable is your choke cable. Remove the choke cable and flip your choke switch and make sure the end of your choke cable retracts when the choke switch is flipped on. Also make sure when you put your throttle slide into the top of the carb that you have it facing the right way. The side facing your idle screw should have an angled cutout at the bottom where the screw seats against it.

 

This is obviously an electrical problem.
check all your connections, first the one on the kill switch.
GOOD LUCK!!!

2000 SCRAMBLER 400 2X4

SCRAMDADDY400

 

It has started 1 or 2 times by itself when warm so I dont think it is electrical, and it won't start on ether if it were an electrical problem.

 

It won't start because the combustion chamber is not being fed fuel.

It could be that:

1. There is insufficient intake vacuumn caused by partially seized or stuck piston rings, or air leaks in the intake system. Hopefully it is not this first scenario.

2. Fuel is not getting into the system.

Realizing these first two theories let's begin.

>>>>>There are 2 cables that go into the carb on a polaris this is new to me what is the extra cable for and could this be my problem?<<<<<<

Sure could, you may have a choke which is out of adjustment. That is what the second cable is for. It is very possible that your "tech" did not adjust it properly when he worked on your quad. There is an explaination of the choke/circuit in your owner's manual and advice on how to adjust it.

Follow Crawdad's advice. He has you on the right track. If the engine runs on ether, the ignition is fine.

What did you find with the choke cable? Is the choke (fuel enrichening circuit) constantly on and pouring gas into the engine resulting in a rich condition? You will know if this is the case because your mileage will have dropped by 25% and your exhaust will be puffing black smoke and other riders will be complaining that your quad stinks and makes their eyes water.

Or is your choke non- functioning because of an improper cable adjustment?

It could be that some fuel delivery circuit in your carb is clogged.

If it won't idle, check the pilot jet.

If it won't run on the top end the main jet could be clogged.

If it backfires adjust/change the electronic throttle control switch. There is a very good possibily this could be the culprit.

Look at the air screw on the intake end of your carb and adjust it out to 1 1/2 to get this thing running. Then turn it in until you reach maximum performance later.

Make sure that your carburetor mounting bolts are tight and that there are no air leaks in the system between the carb and the engine.

Welcome to the wonderful world of two cycle carburetion. This is just the beginning.

 

I will check the choke adjustment tonight, but where might I find that electronic throttle control switch. I hate working on polaris quads the others are a lot easier and CHEAPER to fix. Thanks.

 

The ETS is right there above your thumb throttle. In the black case with the screws on the top. Your throttle cable runs into it.

 

Is this ETS adjustable or do you just replace the whole thing.I was just looking at that the other day I beleive its blue on my quad.

 

.

 

If you have spark when it won't start then it is not the ETC. I think you need to better describe your problem. As I understand it is only a cold start problem. Is that true? Or is it hard to start all the time? Does it fire instantly as soon as you give it a shot of ether, or do you still have to frig around for a while to get it to go? The better you describe the problem, the better the answers you will get!

 

It is impossible to start cold it will start 1 out of every 50 tries warm. It starts with half a pull of the pull start with a shot of ether. Once it starts if you keep it going with the throtle for a while it will stay running. If there is anything else I missed or someone needs to know just post it I check the forum all day long from work.