Hello everyone,
I have a 1980 ATC110 that has kind of been my intro to learning to work on and maintain something like this, and I was hoping that you could help me trouble shoot it. The last few months, it has been having trouble starting. I always eventually get it, but it has been way more difficult than it used to be. Here is the process that I go through to get it started:
- Turn on the fuel petcock, turn on the choke, make sure the switch is in the "run" position, etc.
- Put my left thumb on the throttle to give it just a little gas, and then pull on the recoil starter. It fires on the very first pull almost every time, but then it immediate dies.
- For the next several pulls, nothing happens.
- Eventually, it fires up again and runs for a few seconds but usually dies again.
- After a couple times of that and messing with different positions of the choke, it starts and stays running.
- I give it a little bit of gas for a few seconds and turn the choke off. After a few seconds of this, it idles fairly well.
- It bogs down a little on full throttle and runs a little rough until it warms up, but then it runs and idles perfectly. If I kill the engine but then start it again while it is still warm, then it will start on the first or second pull and run fine.
It has a new plastic gas tank, good fuel lines, two new inline fuel filters, a new spark plug, a new oil change with Rotella Triple T 10w-40, and I've checked the timing on the ignition points. I fiddled with the points timing a little bit, but I ended up right back where I started. The carb is a Chinese clone that I bought a few years ago, but it has been working fine until recently. I checked the carb, and it is clean and everything. I removed the pilot and main jets and shot carb cleaner through them and can see daylight through them. I'm not sure what else would be causing my problem. The strange thing is that it runs great when it is warm. It has good power for a 110, and I was even driving it in 4th gear high the other day.
Can anyone here point me in the direction of what to look at next? I love riding it, but I find myself doing it less often because it's such a pain to start up.
Thanks,
derrick81787