hi everyone I'm new in atv world I got 88 250 polaris I think is 85 beacuse of the air filter box and fuel tanks is different form 88. my problem is I just got this 2day ago and i can't get it to start up. I remove the spark plug and exhaust elbow from btm of engine and it was grey color and wet so I clean it as much as I can remove carb to and clean it put new spark plug new gas but no luck I remove exhaust again and it run for 5sec I turn it of because I got no exhaust and spark is coming out. put back exhaust pipe back on and no luck. I'm going to check the compression to see if that is it can someone tel me what is comp should be in this one ? and also someone said if my reed is gone it won't run I remove the carb boot and I dont see reeds. is there reeds in this one please help my first project thanks in advance

 

Nope. No reeds.

 

do you know what the comp should be?

 

minimum of 100. Should be 120.

 

might check the spark arrestor to see if its full of buildup. we had one the other day that would not push smoke out the tail end. took it off and poured some b12 in it. didnt even run out the other end.

 

hi eggenz7 what is spark arrestor? also I check on web for what type of spark plug and it was br8es and the one i put out was br9eya would that make a diff. and stil no luck upter replacing plug. any idea where i should look for i check spark,clean carb put new gas all good. timing how do i check for that if is firing at the right time? thanks

 

If you have spark at plug,check for other problems, BR8ES correct plug, If you dont have a compression tester,just remove plug,crank over and see if pops your thumb up on plug hole,crude,but can give you somewhere to start,if DOESNT then possible piston/ring problem. Timing is controlled electrically,SO dont worry, if machine has not run in a while probably need carb clean and possible needle valve replacement! Spark arrestor referred to is the muffler,but if can feel pressure/air coming out while cranking,probably not the cause.

 

thanks for your time old polaris i put my thumb on and it push my thump i also clean the carb were do i start w/ this? I got it runing w/o exhaust but turn it off because spark coming out so put back exhaust and try it but no lck

 

Remove carb float bowl(4 screws) clean hex head main jet,pilot jet in small tube up in carb,remove and clean. Must see light through them after cleaning,can use spray carb cleaner or air. Be carefull. if replacing needle valve under float arm as you can damage carb posts trying to remove float arm pin. If is an old 85 model,may also check as suggested above that exaust system open, not stopped up from carbon over the years. Air compressor and blow nozzle helpful on jets and blowing through pipe from exhaust end to see if open

 

i did all of that but stil no luck i even put gas on the spark plug port and stil won't fire up. [img]i/expressions/face-icon-small-sad.gif[/img]