i have a 2002 arctic cat 300 2x4 it runs great once you get it started i have had carb all apart and replaced needle seat and diafram cleaned all the jets but it is still hard to start it takes all most 15 min of cranking to get it to start please can some one help me ray in minnesota

 

Is that an accellerator pump carb? If so, I'd check that.

 

With these things start proceedure is everything. First off turn the choke on and DO NOT touch the throttle. If you do it won't start. No crank the engine and still don't touch the throttle. It will start and run with out the throttle when cold. When warn crank the engine and then just a touch of throttle. FYI, no accerlerator pumps on these carbs.

 

You might also want to check your intake and exhaust valves. They may be out of adjustment which can cause hard starting.

Also, check that your spark plug is the correct heat range, my manual says your machine should should take a NGK DR7EA spark plug(gapped at 0.6-0.7mm). You could try a little hotter plug, but I am not familiar with NGK plugs enough to say wether a NGK DR6EA or a NGK DR8EA plug would be hotter.

As Bear mentioned, find the machines starting procedure. What ever it is, and follow it and starting will be a lot easier.

I have actually found that my 400 starts easier with the choke off on the first try and then choking it the second try if it fires and dies. While my TRV is the exact opposite.


SJ

 

it started just fine all winter i use it to plow snow but then all of a suden it just starting hard and when it does start it runs great

 

Sounds like your enrichening system (Takes the place of a choke by dumping extra fuel behind the slide) isn't working due to being plugged or the cable broke or frozen ot the valve stuck or passages plugged.

 

this modle has a choke and it is working i have had the hole carb apart and cleaned it

 

It has a lever, labeled choke, but the cable operates an enrichment valve. There is no choke butterfly on this model. There is a slide and a throttle valve but no choke betterfly valve. Check here for the carb breakdown:

http://www.alpha-sports.com/arctic_cat_atv_parts.htm

 

That's how all atv/dirtbike/and most motorcycles work.

 

thanks sparkey for the link it is great and u r rite but that is working i have had that apart as well and to say this again this problem just started all of asunden it started fine all winter