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Hello

My son has a 2003 dinli helix 90. When I start it ( cold ) it will run fine for about 5 min. After that it has no power and just bogs and will not take off. If I push it I can get it going but once you slow down or stop there is no power to get it to go. I think it may be a choke problem. It has a electric choke. Does anyone know how to test the choke or could it be something else? I have installed a new fuel filter and spark plug. Any help would be appreciated.

Could be a choke problem but have you tried to clean the entire carb? If not disassemble the whole thing and clean it real well with carb cleaner paying particular attiention to the airtrac holes and ensure you clean the choke mechanism as it may be sticking because of build up not failure.

If this doesn't help, let us know someone here will be able to get you up and running.

Thanks I will give it a try

Ya, like brad said.. give it a good cleaning. We we had the stock carb on our Scrambler 50, the choke would always work great after a good carb cleaning.

Bryce

Just a plug about dirty carbs. I am becoming more and more of a believer in fuel stabilizers. Started using it in my storage container, quads and lawn equipment. I've gotten easier starts and better running machines. Noticeable difference. I'd highly recommend it for any fuel that sit's for more than a few weeks.


sta-bil

Hello,
Might check rollers as they get flat spots+some times get stuck.Had this happen before.
Aaron

Took carb off. Gave it a good cleaning let it soak in carb cleaner. When I took out the air mixture screw it was at 3/4 turn out. I am use to 1 to 1 1/2 out. Put the carb back on same thing no power on take off. This time I had the air mixture screw a 1 turn out. So I play with the air screw 1/8 turns at a time the more in I go with the air screw the better it will take off. But I don't like the idea of it running at 1/2 to 3/4 out. And it still does not have the power it had before.

my guess is youre too lean. dunno why it would suddenly change on you, maybe weather conditions, engine condition, spark plug condition...

if it seems like it just bogs, like it runs out of fuel, then it's probably too lean and needs a bigger main jet. the choke works by heating a wax element which when fully melted allows the enrichment circuit to close. the electric power on the choke does two things: heats the wax and pulls closed a solenoid. if your choke is not working its either hung open/rich, or stuck closed/lean. if the latter, it'd be a hard starter. if the former, it may burble and feel flat.

but if your main jet is lean, try unplugging the choke, which will have the effect of holding open the enrichment circuit. see if your condition changes. if better, then get a bigger main. if no change, maybe your choke isn't working. if worse, you were already too rich (possibly caused by a plugged air cleaner?).

the fact that you seem to get better operation by turning the idle mixture screw out means it's favoring a lean mixture (the screw controls bypass air, not fuel). which implies the latter scenario above.

let us know what you find

[quote="Samson"]Just a plug about dirty carbs. I am becoming more and more of a believer in fuel stabilizers. Started using it in my storage container, quads and lawn equipment. I've gotten easier starts and better running machines. Noticeable difference. I'd highly recommend it for any fuel that sit's for more than a few weeks.

A note on fuel stabilizers. A friend of my dad's is a car collector. He has several hundred cars, some with 0 miles. He used to use fuel stabilizer. he found that the fuel lines would become plugged so solid that he would end up replacing all the lines and other affected parts. Ever since he stopped using and just fills with plain gas, hasn't had a problem since. On the other hand, both my father and I use Sta-bil and haven't had any such problems.

I suggest you get rid of that carb. Go to a 20mm with a manual choke. It'll solve many problems.