I picked up this 1990 250 2×4 trail boss a cple years ago. Fresh gas,cleaned the carb,new plug and it hasn’t let me down since. Ive been working on ATV’s and small engines my whole life and this one is getting the best of me.
Was out riding over the weekend and it came to a sputtering stop and wont restart.
I went through the carb,have great spark, 125# compression and pulled the crank case drain and nothing came out.
I can get it to fire if i spray starting fluid into the carb while cranking and that’s it. I’m getting gas and bright blue spark.
I notice i’m not getting any major suction through the throat of the carb, like it isn’t drawing vacuum through it to draw gas into the cylinder.
So with my research it seems i need to replace the 2 crank oil seals, does this sound like the next direction to take?
Thanks in advance and thanks for a great site.
