Why won't my China Scoot start after short trip unless I change spark plug?

by Pat Connelly
(Buffalo, NY, USA)

My 2006 150cc Avanti touring scooter won't start after a short trip, until considerable cool down, or if I change the spark plug.

Can anyone help?

Comments for Why won't my China Scoot start after short trip unless I change spark plug?

Click here to add your own comments

Jul 06, 2011
spark or no spark?
by: Anonymous

When you change the plug do you first check for spark and see none so assume a faulty plug or do you just change it because that seems to solve the problem? If you are not getting spark until the plug is changed then the fault is electrical and likely an intermittant open due to heat expansion causing the fault to trigger; the plug change only allows time to cool so the fault temporarily subsides. If you are getting spark then why change the plug? In that case it is much more likely to be a fuel system problem. Aside from a fuel fouled plug check for a kinked line, for example in CA legal scooters have a line from carb to evaporative canister which in some models at least will cause stalling if kinked, though after a time it will start again and run ok for a brief time before it happens again.

Jul 04, 2011
by: dadob

You’re probably flooding the combustion chamber with too much gas. Removing the plug lets some of the vapor boil off and the new plug just means dry plug. If the plug looks wet when it won't start I'm right. If dry I might still be right. I have noticed most scooters have problems with dependable or quirky automatic chokes. For example when mine is cold if I turn the throttle even a little it won't start. I have to just push the starter button and it starts right up. Then I have to wait a few seconds before I give it a little gas or it will die. But, that's just in the cool of the morning, the rest of the day I have to goose the throttle a little or it won't start. This works in winter too.

Try different methods of starting from no throttle to tiny throttle to full max throttle to clear the combustion chamber of flooding. CAUTION CAUTION if the motor starts it especially at full throttle it could take off on you and cause injury or damage. Keep the brake the left brake on tight, and release throttle immediately; or put it on the stand so the wheel doesn't touch the ground;, or switch off emergency switch which will allow the motor to be turned over without starting to clear the chamber, after 2 or 3 seconds of full throttle turn over turn the emergency off switch on. Try no throttle start first, then a little goose of the throttle. Remember the starter motors burn out easily. They should not be turned over more than 5 seconds at a time and not more than three times at that length. Either use the kick start or let it sit for at least 5 minutes so the starter can cool.

You also might try adjusting the idle air screw a little in. Try tiny 1/8 turns.

Jul 02, 2011
or maybe ignition coil fault
by: Anonymous

If not cdi try a damp paper towel to draw heat from ignition coil and see if it then will start; if so you should replace your ignition coil and make sure you have a good ground.

May 30, 2011
Electrical Gremlin
by: Jim Zeiser

I had a similar problem with a scooter from Syracuse. It sounds like either you have a bad connection at your CDI unit, pull the plug off the unit and put it back and see what happens, or your CDI unit is going bad. In the time it takes you to change a spark plug it cools enough to fire a new plug. In a place like Buffalo it's not hard to imagine there's corrosion on your CDI connection.

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Scooter Questions - Cheap and/or Chinese Scooters.

When you're done here, you may also be interested in reading some of these popular pages:

If you like to talk scooters, check out our motor scooter forums!

Battery Tender Junior in package

A battery tender like the Battery Tender Jr. can make all the difference in whether your scooter will start right up each spring, after being stored for months.

Just about every scooter owner needs to have a battery tender, sometimes called a trickle charger. Unless you are lucky enough to live in a climate where you can ride all year long, chances are your scooter will be put on ice, figuratively-speaking, for at least a couple months every winter.

One of the key steps in winterizing a scooter is to protect your battery from draining during its "rest" period. This can – and will – happen if you leave your battery sitting untended in your cold scooter over the winter, even if it's in a garage or shed.

Read our review or go right to Amazon.com to buy this highly recommended Battery Tender Jr NOW...


ATTENTION! I have had to delete the Scooter Forum for this site, unfortunately. Despite my best efforts, I could not adequately prevent daily attacks by hackers and spammers. Even though most of their posts did not go public, they still cluttered up my website host's server space, jeopardizing my account. I appreciate everyone's contributions over the past few years and I apologize for having to do this.

Wondering why your scooter question never got posted?

Chances are, there is a good reason. Did you...

If you "checked yes" on any of the points above, then I've deleted your post. Sorry, but I have standards. Feel free to re-submit, following the instructions I have everywhere on the site.

Also... all submissions have to be reviewed by me, and I am currently backlogged. Comments go live without approval, but still take 30 to 60 minutes to show up, so don't repost them, please.

This Week's Highlights

Share Your Scooter Blog Here
Your Help Needed!

We have lots of unanswered questions... can you help? Also, check out our newest eScooter Club members We are growing every week!

Keep Up to Date

Follow us on our Facebook Fan Page Follow our updates on Twitter
Subscribe to my motor scooter blog Subscribe to our RSS feed in your feed reader

Help Us Grow

Support This Site

I support this site by using affiliate marketing and running Google ads. I earn a small commission when you purchase items here, which helps to keep the site afloat. Thank you for your support.

XML RSSSubscribe To This Site

follow us in feedly
Add to My Yahoo!
Add to My MSN
Subscribe with Bloglines