Darn Scoot!!! By tyscoots (Read 903 times)

[tyscoots]

Ok, so I have a JCL 250A (2007)

It has always been hard to start, over time it got really hard to start so I thought that a valve (.004 and .006) adjustment would do the trick. Well, it did not. So far we have changed the spark plug, cleaned the carb, did a compression check which was fine, and checked the hoses. Darn scoot will start and run up to 15 minutes sometimes, then it stops. Seems to not be getting a good gas flow. I also seem to notice a slight oil leak sometimes.

Any advice as to what I should check next? This may be a long shot but I did put a few shots glasses of sea foam in it. Would that cause problems? Also, I left it in the a bad rain storm without the cover on it. Since then the alarm works but it is very low. Any suggestions? This scoots has less that 200 miles on it.

Help!
Thanks in advance

Tonya

Attachments:

[ce]

Buy some bigger 3/16 T's at the auto parts store and reroute your vac lines so the fuel pump is connected solely to the intake manifold. If you don't have good vacuum to the pump you'll have low fuel pressure. Usually the stock T's are 1/8 "

Charge your battery, it's pretty taxed from using the alarm and cranking the starter, you're probably not getting full spark. Check all your grounds and connectors for corrosion, your scooter sat in a box for 4 years.

You have the Linhai 257 engine.

[Bashan]

Great advice from ce. Hey ce, do you think the fuel pump could just be shot if she replaces those lines and it's still a sorry fuel delivery? I don't think the Seafoam did anything detrimental but I wish people would quit pouring that stuff in thinking it's a fix for every problem. I'd unhook the alarm if you can figure out the jumpers from the wiring diagram, those things suck power and provide little security. Well, that's my 3 cents. Rich

[ce]

Those pumps are pretty stout, and if you suck on the vac line to actuate the fuel delivery, it'll suck right back at you pretty quick, so it needs a good bit of vauum just to work. We had one in a 150 that struggled at WOT consistantly, so we replaced it with a used Mikuni dual port out of a snowmoble in Michigan.

Mostly I wanted a cool snowmobile pump, because that has to be fail safe, and we tee'd the two ports together to the fuel inlet, and it still works great.

The Jin Bo that's in there should work, as long as the vacuum is good. It may be the float level in the carb is off or impaired, which might be more intermitant than a complete emptying of the fuel bowl at WOT when the float valve isn't allowing suficient flow to supply the engine at maximum consumption.

As we know, that's when vacuum is lowest as well.

I don't mind pouring in elixirs and potions if it will influence the cure in any way, because all too often we'll be quite facile and say, oh, yeah, just pull that carburetor off and open up the fuel bowl, make sure the float is aligned to 18 millimeters from the side off the bottom of the carb body, now watch that little tab, see how it presses the float needle in, feel the spring tension as it seals against the seat, you don't want it to be too tight, or it won't open, or too loose or it won't close.

So easy, you might not have to do anything, just see if it looks right to you. We'll be right here, 2,000 miles away, if you need any help.

[tyscoots]

Hi Guys,

Thanks so much for your advice. This scooter is so frustrating sometimes, I have learned so much tinkering with it. It really is a nice running scoot

Oh, and I used the sea foam before and try to use it every fill up. Just did not mean to pour so much in this time.

We are so looking forward to getting back to work on it this week. Again thanks for the advice and I will let you guys know if we can get it running. Wish us Luck!!!

Tonya