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Post by dystopias on May 25, 2013 21:08:23 GMT -5
[replyingto=tvnacman]tvnacman[/replyingto]Okay, I opened it up and looked at the gaps on the valves. i was shooting for .08 mm (i hope that is right). One was fine but the other was too tight by a couple tenths of a millimetre.
After i did that i put it back together and actually got it to start. But now it still doesn't start great and seems like it will only start if I open the throttle all the way - which doesn't seem like something i should have to do . . .
the idle screw is almost all the way tightened (not sure if that is right, but after i did get it to start that is where i had to put it to keep it idling.) It idled for a good 5-10 min fine, but when i took it out for a spin around the neighbourhood, it stalled while idling three times.
I feel like i'm getting closer - any ideas from here?
thanks again!
-Mitch
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Post by dystopias on May 31, 2013 21:28:12 GMT -5
Well, today i tried some starting fluid, which i sprayed directly into the intake. Nothing. which leads me to believe it is a spark/electric problem. what things should I look at? I tried the spark plug, grounding against the engine, and saw a spark - not sure how vigorous it is supposed to look though . . .
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Post by scootnwinn on May 31, 2013 21:55:29 GMT -5
.08 is twice the clearance. Should be .04 int .05 exhaust
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Post by dystopias on Jun 1, 2013 14:05:03 GMT -5
[replyingto=scootnwinn]scootnwinn[/replyingto]oops. thanks! i'll adjust it today. is .04 mm capable of preventing it from starting?
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Post by gatekeeper on Jun 1, 2013 19:44:40 GMT -5
.08mm is fine. That equals out to about .003 inches.
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Post by dystopias on Jun 2, 2013 16:57:32 GMT -5
Ok, well i adjusted them to .04, and unsurprisingly it still won't start. even with starting fluid. I triple checked the plug, and it definitely sparks and is in securely - so if i'm getting gas, and spark, why not running? the only other thing i think you need is compression - how does one go about testing that? I read on another site that you can just use your hand to push the kickstart - if you feel resistance than you probably have compression - but i don't know what else could be wrong. thanks guys.  |
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Post by gatekeeper on Jun 2, 2013 20:17:13 GMT -5
A quick check for compression. Pull the spark plug out and place your thumb or finger firmly over the spark plug hole. Crank the starter. If you have good compression the air from the cylinder will blow your finger off of the hole.
.04mm is kind of tight. Try resetting the valves to .08mm. (.003 inches)
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Post by dystopias on Jun 3, 2013 20:04:31 GMT -5
took out the sparkplug and covered hole with my finger. tried starting. sure enough, finger was blown off. I mean blown off the hole, my finger is still attached to my hand.
so I have compression, which means I have no idea what could be wrong. I didn't actually clean the carb. - but when i looked in it, it really did look clean. anyone have any ideas of what else could be wrong? it really isn't starting . .
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