I have a 1991 trail boss 250, 4x4, and when i drive it, it will run for about 10 minutes, then start to get a weird loudness, and then die out, then wont start for a little bit, then after a while it will start again but wwith a hard time, then it will get loud, sound weird, slow down, wont go fast, and stall. Could it be the spark plug? or overheating? how would it be overheating if it is? Cause im suppose to going riding far saturday. anyone help? thanks

 

anyyone??

 

its not your spark plug, but it wouldnt hurt to get a new one. Does your Boss have a "HOT" light on the dash? I used to have a '90 Boss 250, and it had this light. See if you have one. It does sound like it may be overheating. BTW, what does your "weird loudness" sound like? If you could describe it, that would help..

 

Your piston is hot seizing in your cylinder you need a rebuild.Check to see if your oil line didn't come off thats what happened to me---twice.Check it out.

 

ya, it does sound like it might be time for a rebuild.