Well, I did a lot of research but didn't listen before I purchased my son a Veken 150cc. If you are not familiar with this model, it *looks* a lot like the Hanma and SunL models and, for all I know, may be the same maker. Anyway, I've had problems from the start....first a loose wire at the brake wouldn't let it start...fixed that, but broke the cheap seat lock in the process of trying to troubleshoot. Found out that the kickstart is a piece of junk that won't work if we need it to. But now this...my son got on the ATV, it started fine and he went down the driveway and it shut off. We can't get it to turn over now. It cranks and cranks, but drains the battery without ever starting up. I changed out the spark plug, but guess it won't be that easy this time.

I'm a single mom with NO engine knowledge whatsoever. I was looking for a way to drain the carburetor, but can't even find a plug to do that! Does anyone have any photos of the carburetor and how to drain it or clean it??????

Last resort, I'll take it to small engine repair, but wanted to see what this group might suggest.

Bottom line: if you're in my position and don't know much about ATVs/engines....spend the extra money to go namebrand. At least that's what I wish I would have done if I could do it all over....

Please don't take this chance to tell me how stupid I was....I don't need that right now.

 

first thing check to make sure you have enough fuel and the petcock (fuel valve) is on. next what i would do is check spark to see if you have a ignition sourse, remove spark plug, reinstall sparkplug cap then lay the spark plug on something bare metal, nornally the clyinder but the 150's have a plastic cowling around them so maybe the engine case, then crank the engine over while looking at the spark plug tip, if you have spark then more than likely then it fuel related, but if you have no spark then i would start by looking for a loose wire connection, you can usally find one by trying to start the engine while jiggeling each wire connector around. first two wires i'd start with would be the brake lite and safety switch on the front brake lever. then next would be the wires going into the cdi unit, if it fuel related and you do have spark then you need to make sure you have fuel flow to the carburetor, make sure the petcock is on (fuel valve) the drain plug is a brass screw recessed on the float bowl, to drain just unscrew it until fuel flows out the drain tube. if you have carburetor problem then i woud just spend the $35 and buy a new carburetor off of e-bay, just doesn't make sence to me to screw around trying to clean the carb while these thing are so cheap. if you need anymore help or need to clarify anything my e-mail is luvmysxs@yahoo.com

 

Like luvmysxs said, it's usually either fuel or spark.

Spark is easiest to check following luvmysxs's instructions. If the starter turns over, and it has no spark, then I doubt it's the brake light switch. But it could be the shut off switch on the handle bars. Is this unit stored outside? I store mine outside under a cover and have found the electrical connectors corrode easily without some sort of electrical grease on the contacts. The CDI connector seems to be a likely cause. The CDI is usually a black box, mine is mounted on the frame towards the rear of my bike, yours may be somewhere else though.

If it's fuel, then any number of things could be causing it. Are you smelling fuel after cranking it for so long that the battery dies? If so, you likely have fuel. The stock fuel filter is less than desireable, Mine clogged up within it's first 25 hours. Following it's path from tank to engine systematically is the best way to trace the problem. How many hours has this thing been ran? If not long, did you run it at idle long enough to disolve the gell in the carb bowl before riding it?

A short fuel test that you can try is to remove the air cleaner, spray a SMALL amount of starting fluid down the opening and try starting, if it starts for a second, or stumbles more than without it, then it's likely a fuel problem.

Good Luck, post what you find, pass or fail.

 

Thank you for taking the time to respond. While I don't have any idea what some of the things you mentioned even are (e.g. petcock), I do work with a guy who may know and should be able to describe where to find all the items you mentioned. I really want to be able to troubleshoot it myself and learn how to maintenance it and appreciate your willingness to offer solutions.

BTW: I did take a screw out of the carburetor. It was on the side. It had a spring wire around it. However, when I took it out, nothing came out. Could this mean that there was no fuel in the carburetor?

 

As a matter of fact, I don't smell fuel when we try cranking it. I have a hunch that it may be some sort of fuel problem and that's why I was checking into the carburetor. I did double-check the cutoff wire at the brake handle as that had already caused me problems before. I reattached and jiggled while trying to start and nothing...the connection *seems* secure.

I really do appreciate all the suggestions to try and will definitely post the cause of the problem (once it's solved)!

 

no that wasn't the screw, didn't you read my instructions? the drain screw is almost bottom on the float bowel, it made of brass and is recessed, the screw with the spring is the idle adjustment, look next to the bottom for a brass screw and turn it cc until fuel flows from the overflow line. the petcock is the fuel valve , underneath the tank where the fuel line plugs in at, this valve needs to be turned on, no gas-no go

 

geez...yes, I read your instructions and was quite thankful. I had tried the screw yesterday and had just forgotten to mention it.

 

if you turn the drain screw yesterday and no fuel came out of the overflow tube on the carburetor then you need to remove the fuel line at the carburetor and see if you have fuel flow going to the carb , if no fuel then double check the petcock (fuel valve) and make sure it's turn on, then still no fuel, remove fuel line at the tank and see if their's fuel flow. if no fuel flow there then you'll need to remove the petcock (fuel valve) and clean it, this is the off and on valve on the botton of the fuel tank where the fuel line hooks up to it. this takes a phillips screw driver and just remove the 2 screws, when removing the fuel valve just make sure to have a catch pan big enought to hold the gas, do not reuse this gas.

 

Very clear steps! I will work thru them and let you know. Thanks.

 

If the carb is dry, there are 2 possibilities to check, one, as stated before, check the petcock ( on/off valve under the tank, hose goes to the carb) another is a stuck float, if it is stuck in the up position, no gas will get to the carb. You can either gently tap on the bowl of the carb with a screwdriver handle, or take the hose off the petcock (turn off gas first) and see if you can spray carb cleaner down the hose, or try blowing to see if air flows into the bowl. With the hose off, you can see if the fuel is coming out of the petcock(fuel valve).