6hp temcuseh yerf dog problems??

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bjj

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ok so i been trying to get this go kart started for about 3 weeks now a few weeks ago it would start then eventually sputter out now it wont start and as of today the string is stuck and i cant even pull it the whole way....i already cleaned the carb and bought a rebuild kit also adjusted the rockers since one was loose then i put the gas in and still drools out the carb and cant start...any help??...im about to give up and sell it as it:auto:



how would i fix the string ?
 

bjj

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First you need to figure out why it won't pull out; it could be a problem with the recoil or the engine itself. What happens if you pull it slowly?

if i pull slowly it still stays stuck it was fine this morning i tried starting it after i adjusted the rockers and it was fine after a few pulls then it became jammed
 

Papa P

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Did you adjust the valves with the piston at top dead center on the compression stroke?
Did you use a feeler gauge to set the gap properly?
Papa P.
 

bjj

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Did you adjust the valves with the piston at top dead center on the compression stroke?
Did you use a feeler gauge to set the gap properly?
Papa P.

no i did not use the feeler gauge...would that be the reason why the string is stuck...how would i get it free?
 

fowler

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do u know how to set the piston at tdc

u cant possibly set valve lash without a feeler gauge (or get it within sepecs anyhow)

id say u have attempted to set it at some random place in the cycle and have built up too much compression

remove the spark plug and that should do it but be warned if u have pulled and pulled then u have built up alot of pressure so the spark plug might come out with a bang

its not dangerous or too powerful but just be ready for it and dont use a spanner use a socket

to set the piston at TDC u must turn the engine over till the piston is at the very top of the compression stroke

as u turn the engine over watch the valves and remove the spark plug to watch the piston

every 4 stroke motor has the same patten

intake
intake valve down,, piston goes down
compression both valves up, piston comes up (TDC)
power
both vales up, spark fires and piston drops
exhaust
exhaust valve down, piston comes up


the other thing u may have done is tighten the adjustment screw down with the valve half down
so as u pull the starter string the cam is trying to push the rod up but the valve is already bottomed out



id advise u remove the spark plug and wide out the adjustment screw then buy a feeler gauge and complete the test properly
 

OzFab

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Either that or the valve is opening & hitting the piston. Start over, back the rockers right off & follow the video to the letter; I chose that particular video because the directions are very explicit...
 
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