TT250 hiccup

[moparrob]

Originally Posted by Weldangrind

I was recently trying to drill out a slow jet with a 61-80 numbered drill set (and a pin vise), when it all went pear shaped on me. I couldn't make any sense out of what was happening with the motor, since it was behaving like it was getting way more fuel than I was providing. It hit me a few days later; the drill bits were incorrect from the factory. I had drilled the jet out way too far.


I took each bit out and measured with a vernier, and discovered that of the 19 bits in the index, I only had six sizes (which were triplicated). I've learned to measure the bit before I happily drill away, so I don't unwittingly go too far.


I didn't think I'd have any success in filling a slow jet with solder. Since I had another virginal jet, I drilled it to the correct size (according to Mr.Vernier) and the motor was happy.

I used a micrometer as well since I did not trust the size of the drills as indicated.