I have just purchesed a 85 250 trailboss with some carb problems it dosent run as of now i havent had a chance to get into it and i have to order the manual for it i was wondering if carb problems are common the person i got it from said it ran fine with a lot of power last year and this year it was gummed up and some gas ran into the pull cord case like i said i havent had time i only bought it four hrs ago i am going to start getting into it tomarrow butt if anyone could shed some light on this problem for me i would greatly appreciate it.

-D.J.

 

welcome to the forum dj

i would start by removing the carb and completely cleaning it along with draining the old gas.

 

Agreed. The old gas probably turned into varnish in the carb. It needs a good cleaning and rebuild. Drain the gas tank.

 

Do as said earlier but also pull the exhaust pipe and drain any gas out of it.

 

Thanks i got the carb off and cleaned it was deff gumed up butt cleaned very easy. the person i purchased it from wasnt to honest i guess cuz it dosent seem to have any spark and to be honest i dont have a lot of experience with these kind of motors i appreciate the help

 

Always try a new spark plug, especially with 2 strokes.

 

Always set the gap on your new plugs. There's no such thing as a "pre-gapped" plug but some people don't check.

 

Replace needle and seat,cleaning doesnt always help,gas has leaked into crank past crank seal if rope is wet. Bottom of engine is 10mm slotted drain bolt to drain crankcase,then do as posted above plus premix first tank 50-1 to keep from washing down piston from excess gas! Hopefully seals won't distort and leak air (erratic idle,or idles down and dies. Good luck!

 

i took the exhaust pipe off and there was gas in it

 

chances are like old pol. said the needle and seat should be replaced. im working on a sled right now that hasnt run in 5 yrs and what a night mare as the gas poured out brown sludge. make sure that the killerand key switch are working if theres no spark as well.