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Post by mechaniczman on Dec 15, 2011 22:57:51 GMT -5
I cant get my scooter to start, its a 2006 Baccio Runner 50cc 2 stroke. It has 12,000 miles, CVT checked out OK, I have checked compression and after kicking it a few times with the throttle open it has 150psi of compression; excellent. I checked for spark on the engine and on the frame, it is the biggest spark i have ever seen...it was PURPLE!  I cleaned the Mikuni carburetor out with a sewing needle, and carburetor cleaner, i cleaned the air filter and airbox, drained all of the old gas, added new gas. The spark plug is wet when i check it after kicking the engine, and if i kick it with the spark plug out i see gas shooting out so i think its flooding, so after i (de-flooded it) it actually started for a second and then died...it will only attempt to start if i hit the gas...sometimes, if im not giving it gas it doesnt even try to start. The only thing i can think of is the reeds, so tomorrow i am going to take a look at the reed valve, do you think this could cause it not to start or not to stay running, or to flood out the engine? Mechaniczman P.S. Not my scooter in the picture, but a look-alike. Thought id give you something to look at. Attachments:
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Post by dirtyolman on Dec 16, 2011 11:06:52 GMT -5
The only thing i can think of is the reeds, so tomorrow i am going to take a look at the reed valve, do you think this could cause it not to start or not to stay running, or to flood out the engine? quote] This sounds about right, you may have cracked or broken a reed which will cause the flooding. |
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Post by mechaniczman on Dec 16, 2011 18:53:30 GMT -5
Ok ii didnt have time to check the reeds yet ive been too busy riding and tinkering with my other baccio runner scooter at the moment.
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Post by mechaniczman on Dec 20, 2011 19:15:25 GMT -5
Ok so i checked the reeds and they look absolutely fine, it has excellent blue spark at the ngk, great compression (150 psi), I cleaned the carburetor out and poked through the jets so they are not clogged, i sprayed carb cleaner straight into the mouth of the carb and it still didnt start.
If i take the spark plug out after trying to start it, it is wet, if i kick it over i can see mists of gas shooting out of the spark plug hole.
Its got me stumped, it has spark, compression, and fuel and it still wont start.
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Post by larry001964 on Dec 20, 2011 19:18:37 GMT -5
Ok so i checked the reeds and they look absolutely fine, it has excellent blue spark at the ngk, great compression (150 psi), I cleaned the carburetor out and poked through the jets so they are not clogged, i sprayed carb cleaner straight into the mouth of the carb and it still didnt start. If i take the spark plug out after trying to start it, it is wet, if i kick it over i can see mists of gas shooting out of the spark plug hole. Its got me stumped, it has spark, compression, and fuel and it still wont start. Have you tried a different plug, Ive seen it where they spark when testing but not under compression.. |
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Post by mechaniczman on Dec 20, 2011 19:32:39 GMT -5
I havent tried that but i will when i get a chance, i checked for spark on the engine and on the frame and it was good both ways.
Altogether with all the attemps to start it, i have heard it run for no longer than 1 or 2 seconds
btw i am using the kickstart....dead battery
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Post by imnts2 on Dec 21, 2011 6:20:24 GMT -5
Flooding is almost always the result of too much fuel entering the combustion chamber. If you have not tried a spare plug and you get a nice 1" snap from the plug wire to the block, look for soomthing causing to much fuel to the combustion chamber. A restricted intake (choke stuck or a mouse in the intake etc,) or a stuck open float valve - like a sunk float full of fuel or bent arm. Its a pretty small space that float workis in they can sometimes rub the wall and stick open.
I have even shut off the fuel line (pinch it with a small vise grip) and cranked till it starts. Got to get all the fuel out of the crankcase on a 2 stroker so it takes a while once you get it flooded.
lots of luck, a few cokes and patience.
Cheers
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Post by mechaniczman on Dec 21, 2011 15:05:46 GMT -5
What do you mean by a nice 1" snap from the plug wire to the block?
I Cleaned out the airbox and filter already. The choke looked the same as the other ones on other scoots i have.
I did notice when cleaning the carb that the bowl had some scuff marks were the float had been rubbing against it, maybe the float doesnt float anymore.
Good, i have more things to check as to why this thing wont start.
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Post by felliott on Dec 21, 2011 18:07:03 GMT -5
You also need crankcase pressure for a 2 stroke to start. leaking crankshaft seals or any gasket that seals the crankcase could be at fault.
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Post by mechaniczman on Dec 21, 2011 18:53:59 GMT -5
YAY! More possibilities! I will give you guys an update when i get a chance to work on this thing again.
BTW the scooter ran fine before the rear axle got stripped out then it sat for a year or two. I will fix that after i get the engine running.
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Post by gregw on Dec 22, 2011 7:33:39 GMT -5
Try some Ether? Carb cleaner doesn't work well when trying to start a motor. And bad crank seals will make the motor lean and prevent the fuel/air mix from getting into your cyclinder (as much). Too bad your battery is dead. Might want to hook up a battery charger and crank your motor over while spraying short bursts of Ether into the carb. If still no start, try cranking it over and spraying short bursts of Ether directly at the crank seals. If you have spark and compression, Ether will make anything run for a second or two. Use sparingly though, as it will quickly dry out the innards of your motor (absorb the oil in the bearing races). Good luck!
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Post by mechaniczman on Dec 22, 2011 13:56:00 GMT -5
I know carb cleaner isnt the best engine starter, but thats how i got my other baccio scooter to start, i sprayed carb cleaner directly into the carb and it started first kick and tried to pull away from me then died so thats how i knew the carb was dirty, and it sat for way longer than this baccio scoot that were trying to get running.
I will get a can of starting fluid though and try it, just got to find the cheapest price cuz @ over $6 bucks a can thats crazy!
Thanks for all the help guys, I cant wait till monday to finally be able to tear this thing apart again and figure out why it wont start.
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Post by mechaniczman on Dec 26, 2011 19:10:20 GMT -5
I fixed it!!!!!!! And guess what it was? The muffler was clogged. After I had tried everything, i took the muffler off and tried to start it and it fired right up so i put on another muffler i had laying around and it runs now! I shook the old muffler and it sounds like the entire inside of the muffler has rusted out, no wonder it wouldnt start. THEN i tried to ride it and it would just revv up and not go anywere, so i took the rim off and the splines were stripped out so i swapped rims and tires from my parts bike and it runs & drives now. ;D I now have 3 out of 5 mopeds that run and drive. The other two are parts bikes lol Now i just have to fix the brakes so I can stop this bad boy. :oIM SO EXCITED!.....THAT I JUST CAN'T HIDE IT!  |
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Post by scootercapecod on Dec 28, 2011 16:53:37 GMT -5
Well, that doesn't surprise me at all. I had a plugged up exhaust because mice got into it and really had me miffed. Good find though.
Scooter
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Post by feralsparky on Dec 31, 2011 15:28:24 GMT -5
Well, that doesn't surprise me at all. I had a plugged up exhaust because mice got into it and really had me miffed. Good find though. Scooter The Cat Convert on my old Sunfire broke apart and clogged up causing my engine to die and become unable to start or drive. Replaced the cat and it drove like a champ. All due to rusting after the flex bit broke. |
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Post by Scoot-Hacker on Jan 1, 2012 16:16:25 GMT -5
2T motors are very sensitive when it comes to intake and exhaust. I had a 2T Xpeed-50 which had a clogged up exhaust. It caused it to run slower n slower, till I tried an expansion pipe exhaust. I gained my speed back, plus 5mph over n above.
Shortly after I sold it, the new owner swapped in a 90cc motor and now it runs faster than most 150cc scoots.
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