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Post by cravenscoot on Sept 9, 2013 10:37:22 GMT -5
I cant get my scoot to electricaly start. It will kick start after a while of kicking it. So basicaly it wont star. Runs great when it does start. Ive replaced the carb. the cdi. the plug. new fuel line and filter. new batt.new coil. I did find that the brake safty switch had been removed and the two wires were conected together. idk if this matters. the start button turns the engine over.
im ata loss for ideas. anyone?
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Post by nwhicks21 on Sept 9, 2013 10:49:42 GMT -5
check valves and compression
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Post by scooterb on Sept 9, 2013 12:57:45 GMT -5
I agree with nwhicks21...
If you have a compression gauge check it first as it is easy to do.
Not that it is the same engine by the same concept... I had an old 4 stroke lawn mower that would drain a battery before starting but when running seemed to run just fine. I adjusted the valves and it would fire right up and run great.
But I also believe (I am not a mechanic) that incorrectly adjusted valves can impact your compression test so to be safe check both.
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Post by urbanmadness on Sept 9, 2013 18:04:13 GMT -5
yes, valves that are too tight can and will lower compression.
It will start when kicked... I'm thinking it might be spark related tho. (electrical, when the start switch is engaged, it kills spark in this case for some reason).... check for spark while it's being cranked over by the starter.
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Post by cravenscoot on Sept 10, 2013 5:24:36 GMT -5
It seems to have plenty of spark.
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Post by nwhicks21 on Sept 10, 2013 9:38:13 GMT -5
Spark isn't the problem, if you have low compression you will have difficulty starting because your engine is worn out, or if your valves are out of adjustment they won't be opening and closing correctly, therefore your engine cannot breathe correctly, so both of them are a MUST! I would first check compression and look for atleast 120psi, and then adjust both valves to .003-.004 and try it again and see how it goes
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Post by scootnwinn on Sept 10, 2013 12:52:55 GMT -5
I would adjust the valves first...
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Post by skuttadawg on Sept 11, 2013 0:33:13 GMT -5
Here is a valve adjustment guide www.scooterforumonline.com/index.php/topic,1720.0.html The valves can baffle most shade tree mechanics since it gets fire , has compression and gets fuel to the carb , but if they do not open up enough it will not run good and even not start at all . All 4T scooters will need this done at least once . Know that you know this secret you may get lucky and find a used scooter for cheap that you can adjust the valves and flip it and make some cash as well as keep yours running . There is a few videos on this and more how to does on You Tube |
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Post by cravenscoot on Sept 12, 2013 11:21:42 GMT -5
I adjusted my valves, however I didn't have a gauge and a buddy told me to use a matchbook cover, he said that was right at .004''. Anybody have any input? It did start with the start button but I had to work the throttle to get it to start for 20 or 30 sec. I dont what else to do with this scoot short of ordering an engine. I just cant get it to start right, I'm running out of idea's
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Post by cravenscoot on Sept 12, 2013 12:39:54 GMT -5
I just removed my intake boot to find that the gasket was broken in 8 pieces. I would imagine that's the problem for not starting.  |
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Post by scooterb on Sept 13, 2013 13:23:44 GMT -5
I just removed my intake boot to find that the gasket was broken in 8 pieces. I would imagine that's the problem for not starting. Well there's your problem  As far as the feeler gauge... They are only a few bucks ~$4-$10 per set. Worth the investment. Let us know if you get it started. |
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Post by cravenscoot on Sept 16, 2013 6:12:21 GMT -5
Thanx for the help everyone, i'll let u guys know when I get the part.  |
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Post by JerryScript on Sept 16, 2013 7:58:18 GMT -5
FYI - The old matchbook as a feeler gauge is not a good idea. It's a side-of-the-road trick used to get a vehicle back to the garage, not for permanent settings. Spend the $10 bucks on a feeler gauge set, and then lay the .004 gauge next to a matchbook cover, you can visibly see the difference. Not to mention the paper may bunch up on you as you slide it around under the set screw (especially if you live in high humidity). Then there's the fact not all matchbook covers are the same thickness of paper, they aren't manufactured to have any specific tolerances.
When I was a power generator mechanic in the army (25 years ago), I had a 5k unit that we kept running during a field trip by using the old matchbook cover trick. Once we got it back to the shop and used feeler gauges, we discovered it was off by almost .01, which is of course a Huge difference.
$10 bucks for a feeler gauge set is cheap compared to the difference it will make setting your valves properly!
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Post by f4milytime on Sept 16, 2013 11:37:25 GMT -5
I forget the thickness, but when times are hard you can use a soda can. Better than a match book, BUT not as good as actual feeler gauges of course. LOL !!!
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