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Post by beau87 on Mar 18, 2011 17:00:48 GMT -6
Alleyoop thanks for the patience and advice. I have cleaned the original carb twice, maybe three times. That includes disassembly, soaking in carb cleaner, rinsing and blowing out all openings with compressed air at 90 psi. That is why I have concluded there is some malfunction with electric choke. Also sprayed all hoses and connections to diagnose if there was any vacuum or air leak and found none. I have been reading and working on this problem for a month before posting.
Again thank you everyone for your feedback.
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Post by beau87 on Mar 18, 2011 16:25:36 GMT -6
In your picture above it would be the air / fuel adjustment. Sorry for any confusion. I got to 5 1/2 by using the adjustment procedure in the other section of the forum. It wouldn't even sputter without being a minimum of 4 1/2 turns out.
Sprocket - because as stated above the new carb would never start at all.
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Post by beau87 on Mar 18, 2011 15:48:30 GMT -6
k, thanks for all the feedback so far....
Here is the latest update. removed old carb because I believe electric choke is messing up air / fuel screw adjustment. Before I put new carb on scooter, checked idle jet and mains against old carb and noticed that old carb jets looked bigger. Installed bigger pilot jet on new carb and adjusted to 2 full turns. No start, except if I "pumped" throttle repeatedly. Adjusted air / fuel screw to 5 1/2 full turns and scooter idles, but hesitates when turning throttle. So my question is what are the standard size jets that I would need to buy? are they universal fit on all scooters?
Modified terms
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Post by beau87 on Mar 15, 2011 19:28:23 GMT -6
I might add that I bought the 18MM CV CARBURETOR from scrappy dog scooters and it was suppose to be a direct replacement for a 50cc gy6. Is it it not jetted properly for my application? Is there any jetting chart?
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Post by beau87 on Mar 15, 2011 19:18:07 GMT -6
Tried the idle adjustment again, just like I did two times before and detect no change in idle speed. I didn't check the electric choke. I did check choke before I installed originally, I will double check choke over the next couple of days. On another note, how is it that a brand new carburetor doesn't even run at all. Thanks for all the help. I am determined to get this machine running again.
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Post by beau87 on Mar 15, 2011 13:30:54 GMT -6
I am relatively new member to this forum and would appreciate some help troubleshooting scooter issue I have. Let me give some background, last fall I was given a used 2008 Tomos Nitro 50 with roughly 4400 miles. The scooter ran pretty good and the family used it sporadically before putting it away for the winter.
When I attempted to start the Tomos a few weeks ago, the scooter would turn over, but wouldn’t actually start. I figured that the carburetor would need to be freshened up and proceeded to disassemble and clean the whole carburetor. While reassembling the carburetor I broke the electronic choke. So I ordered a generic choke that looked to be very similar to the original and reinstalled in the Tomos original carburetor. The scooter started, displayed swings in the idle speed, would bog down if I opened the throttle and wouldn’t stay running if I quickly let off throttle.
Well I used all the adjustment advice I could find on this board and others, but could never get the engine to idle or accelerate smoothly. So I decided to track down an electronic choke from a Tomos parts bike off eBay, which I did. I reinstalled the choke from eBay and got the same idle result. So I ordered a new carburetor and cleaned the original carburetor again and put it to the side.
With the new carburetor adjusted and installed on the Tomos, I could never get the Tomos to actually run; it would turn over, but never ran. In desperation, I reinstalled the original carburetor and the bike started and ran fairly well. Well enough in fact for me to take a couple mile test drive around the neighborhood.
So yesterday, a day after taking the scooter for a test drive, the scooter would start and idle, but completely bog down if I opened the throttle and wouldn’t stay running if I quickly let off throttle. I don’t understand where I am going wrong with this scooter. I feel like I chased down every possible cause for this possible behavior and still come to the same conclusion … something is not correct on the carburetor.
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