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Post by alfollen on Apr 30, 2010 0:32:53 GMT -5
Hey there,
I need helping find where the spark plug is located on a Coolster F5. If you could help me out that would be great. Thanks
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Post by onewheeldrive on Apr 30, 2010 1:17:22 GMT -5
On the right side of your scooter---it's to the right of your fan, you just have to get down there and look up and inward. Look for a thick, black wire(the ignition coil) with a cap on the end---that cap is inserted onto the spark plug. Here's what the coil looks like, and it shows what the end-piece that snaps onto the plug looks like: enviromoto.ecrater.com/product.php?pid=3809860Just follow the wire. |
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Post by alfollen on May 4, 2010 12:35:43 GMT -5
Ok thanks...I found it and the spark plug looks fine. What else could it be? It turns over but does not start
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Post by onewheeldrive on May 4, 2010 13:54:16 GMT -5
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Post by scooternerd919 on Jan 10, 2011 3:24:30 GMT -5
Hey all. I just bought a Coolster F5 with approximately 1,300 miles yesterday for $120. Apparently it had sat up for about a year and wasn't running. I Took it home, cleaned it up, and brought it inside. Turns out there was no gas or battery so I figured that was a good place to start (lol).
I installed a new battery, replaced the in-line gas filter, and added gas. I checked the spark plug and it looked ok so I haven't replaced it yet. After about 20 minutes I got it to crank but it cut off when I released the brake/clutch. A few tries later I had it running again and I was able to release the brake/clutch without it cutting off but I had a new problem...
My carb was spilling gas out of the little overflow tube. I let it continue to run thinking maybe it was flooded but then it cut off. The gas tank was empty. I poured more gas in and tapped the carb a few times thinking maybe the float was stuck. Got it cranked again and no gas spilled out this time. On to the next problem
It ran for about 30-60 seconds until I gave it throttle and it cut off. I haven't been able to keep it running for more than a few seconds since then. I'm recharging the battery now because it was getting pretty weak.
I have done a little research and I have a to-do list for tomorrow but any advice/input will be appreciated. Thanks in advance!
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Post by relaxinrob on Jan 10, 2011 8:03:58 GMT -5
You will have to clean the carb
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Post by scooternerd919 on Jan 10, 2011 11:39:49 GMT -5
That's on the list. I will probably go ahead and replace the spark plug too. Anything else I should check while I have the scooter stripped down?
Forgot to mention I don't have much compression on the kick start but I'm used to bigger engines so it might be fine.
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Post by medman1952 on Jan 11, 2011 14:54:02 GMT -5
A 50cc is not going to offer a lot to kick against.
While you have the plug out, check out the compression and see if it pushes against your thumb pretty hard, use a gauge if you have one. As I recall something over 110 psi is good, but do not hold me to that number.
While the body panels are off, check all electrical connections, nuts, bolts, screws and hoses.
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Post by felliott on Jan 11, 2011 17:12:13 GMT -5
Adjust the valves!
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Post by scooternerd919 on Jan 11, 2011 17:45:02 GMT -5
Thanks for all the response! I have some time to work on this thing now and I had a new question. The gas line flows from the tank to a splitter. From here a gas line runs to the carb and another right after the carb and there is what I assume to be a vent because there is no gas line attached and it isn't spilling gas. Now my question...
I disconnected the gas line from the carb and no gas poured out until I blew air into the gas tank. Is this normal or do I have a problem?
Also.. It looks like there is suppose to be a hose connected to the intake on my airbox but it's missing. Any ideas?
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Post by nitrogary on Jan 12, 2011 19:03:56 GMT -5
wow , that sure sounds like a plugged fuel filter....1.99 at a lawn mower shop...8.99 at a scooter shop...pick either one, both do the same damn thing
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Post by edfr on Jan 12, 2011 19:19:50 GMT -5
Since the scoot was sitting for over a year with the old gas in it. The first thing to do is take the carb off and take the Carb Bowl off and Get a Can of Carb Cleaner and Squirt it into every hole you see. Lefty Here is a picture of the Carb Bowl off:  |
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Post by scooternerd919 on Jan 12, 2011 22:56:45 GMT -5
I finally found a service manual for the scooter which is a big help! Cleaned the carb today.. Main jet was COMPLETELY clogged up. I blew air and carb cleaner through all the holes and got all the gunk out. The float is now functioning properly. The fuel lines were very brittle and started breaking one by one. Replaced all of them with 1/4" gas line. Charged the battery and got it running again but it's still hard to start and cuts off. I'm sure the below-freezing temps probably aren't helping.
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Post by edfr on Jan 12, 2011 23:45:36 GMT -5
Will it keep running if you hold the throttle a little open? If it does keep running Adjust Your Idle Speed, that is the Screw on the right side of the carb as you sit on it. It has a spring on it, Turn it Clockwise about 1/8 or so doesn't take much to raise the Idle. If it stays running let it warm up. Then Give the throttle a Quick turn and let go, the RPMS should go up without any bogging or hesitation and come back down to idle. If it Bogs, Sputters, Hesitates then you will have to adjust your AIR/FUEL mixture screw.
Lefty
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Post by scooternerd919 on Jan 13, 2011 16:24:30 GMT -5
It seems the throttle doesn't effect when it cuts off. At first it was but now I can give it gas and it revs smoothly. It just randomly cuts out and then I have to let it cool down. I just did a valve adjustment b/c they were too tight. Charging the battery at the moment. The anticipation is killing me.
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Post by edfr on Jan 13, 2011 16:49:53 GMT -5
I think you found your problem, really tight valves will cause it to overheat and start seizing on you, what they call a soft seize, if it starts up again after it cools.
Good Luck
Lefty
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Post by scooternerd919 on Jan 14, 2011 20:56:48 GMT -5
It starts easy and runs good now. It doesn't cut off when it warms up. However, I tried to go for a ride earlier and it just won't go.
I can give it gas while it's on the stand and it responds well but it bogs down or dies with throttle off the stand. Why is it doing this?
Also, I was carrying the scooter up some stairs and the side kick stand got caught on a step. The spring came off and I think something else might of broke off. It won't start when i hold the kick stand up and I don't know where the spring attaches to the scooter. Is the spring part of the kill switch or am I missing something else? Please help!
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Post by scooternerd919 on Jan 14, 2011 21:46:11 GMT -5
"I have seen an intake hose cracked on the bottom so subtly that it did not affect the idle at all. It only caused problems when the rider SAT DOWN ON THE SCOOTER, believe it or not....
The engine would sputter when gunned without the rider on the bike, but would outright die when he sat down on the scooter."
Uh oh.. just found this on another forum. Guess I will look into it tomorrow.
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Post by qwertydude on Jan 15, 2011 11:16:36 GMT -5
I'd check your intake, check it's securely making a seal to the carb and airbox and there are no cracks in it. Also when you cleaned the carb, did you remove the jets and spray carb cleaner through all the passages? Sometimes those little passages can cause running issues.
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Post by scooternerd919 on Jan 15, 2011 19:33:40 GMT -5
I think it's a vacuum hose issue because the gas filter is not filling up like it should. I pulled the hose off the intake manifold and sucked on it but it seems to be clogged. I will check it out tomorrow. Wish I had more time to dedicate to this project. It is driving me crazy!
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Post by qwertydude on Jan 15, 2011 19:58:25 GMT -5
The vacuum tube shouldn't actually flow anything at all. It just applies pressure. The way to test it is to disconnect the fuel line from the carb. Suck on the end of the vacuum tube and if fuel flows out the fuel tube you're good.
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Post by scooternerd919 on Jan 15, 2011 21:25:24 GMT -5
The vacuum tube shouldn't actually flow anything at all. It just applies pressure. The way to test it is to disconnect the fuel line from the carb. Suck on the end of the vacuum tube and if fuel flows out the fuel tube you're good. That's exactly what I did except I didn't disconnect the gas line from the carb because I have a clear fuel filter on that line. It wasn't filling up when I sucked on the end of the vacuum line. Does it matter if its connected or not? |
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Post by qwertydude on Jan 15, 2011 22:37:58 GMT -5
It should fill up on it's own even when connected. But if it doesn't then you know you're not getting fuel delivery. Then you'll need to drain the tank and replace the vacuum fuel valve, you can always replace it with a manual valve if you want.
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Post by scooternerd919 on Jan 16, 2011 2:44:54 GMT -5
It should fill up on it's own even when connected. But if it doesn't then you know you're not getting fuel delivery. Then you'll need to drain the tank and replace the vacuum fuel valve, you can always replace it with a manual valve if you want. I'm going to pick up a B&S shut-off valve from Home Depot tomorrow. If only Home Depot was open at 3am  I know it might be overkill but will it hurt anything to put another in-line filter before the shut-off valve? |
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Post by qwertydude on Jan 16, 2011 10:06:27 GMT -5
There's usually a filter screen insert in the tank outlet right before the vacuum fuel valve. There is on mine anyways, no real point putting another one. That's gonna make 3 filters. Might make for a little too much resistance to flow.
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Post by scooternerd919 on Jan 16, 2011 10:42:53 GMT -5
My scooter only has the one filter after the valve as far as I can see. That's possibly what caused the valve to fail..
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Post by scooternerd919 on Jan 16, 2011 20:45:11 GMT -5
Finally got to take my scooter for a ride today and the engine ran great!
Discovered today that my rear brake was stuck and I sprayed it with brake cleaner. This helped but didn't completely solve the problem. The tire doesn't start to spin until about 3000 RPMs so I am sure this is slowing me down. The front brake doesn't do much at all. I'm changing the brake fluid tomorrow.
I am getting some vibration in the steering column when I get around 25 MPH and I don't know what is causing it. Any ideas???
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Post by scooternerd919 on Jan 19, 2011 12:55:41 GMT -5
my tach just started freaking out today! rpms jump around like crazy when i start driving and go wayyy past redline. I'm pretty sure its electrical. Would a dead or bad battery cause this?
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Post by jimh on Jan 19, 2011 18:32:03 GMT -5
I think you found your problem, really tight valves will cause it to overheat and start seizing on you, what they call a soft seize, if it starts up again after it cools. Good Luck Lefty  |
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Post by scooternerd919 on Jan 20, 2011 17:13:31 GMT -5
I just noticed there is an arc coming off my brake/clutch. I can't get it to start now. I'm thinkin my bad battery screwed up my electrical system?
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