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Old 06-27-2015, 11:20 AM   #1
Billium
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Default Help need info.. Wont start!!

Hello peeps,,
My grand kid was driving my old G9 single 4 stroke this morning she took a break.. she shut it down.. now when i try starting it it wont fire... it will backfire while trying to start the momentary gas switch has been terminated... I've completely cleaned carb & tried new plug... still backfires will not start........ Any idea's as what might be wrong ??? thanks Billium
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Old 06-27-2015, 01:47 PM   #2
cgtech
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Default Re: Help need info.. Wont start!!

Shoot a shot of carb clean or brake clean into the carb throat & crank it to see if it briefly starts, if so, a lack of fuel is the problem.
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Old 06-27-2015, 02:03 PM   #3
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Default Re: Help need info.. Wont start!!

Quote:
Originally Posted by cgtech View Post
Shoot a shot of carb clean or brake clean into the carb throat & crank it to see if it briefly starts, if so, a lack of fuel is the problem.

did that.. Still backfires
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Old 06-28-2015, 01:16 AM   #4
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Default Re: Help need info.. Wont start!!

Get "dynamic spark tester" at auto parts store, check for consistant spark.
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Old 06-28-2015, 09:01 AM   #5
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Default Re: Help need info.. Wont start!!

Quote:
Originally Posted by cgtech View Post
Get "dynamic spark tester" at auto parts store, check for consistant spark.
Getting lots a spark.. When i crank it over & open throttle it backfires more ???
I'm lost :( really need to get this going... It sounds as if the timeing is off ?? ANY OTHER IDEAS ????


Ps. It's getting fuel...
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Old 06-28-2015, 10:00 AM   #6
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Default Re: Help need info.. Wont start!!

a few things to check , first loosen up the exhaust and try to run it , you may have a blocked exhaust , if it runs fine with the muffler off then you need to clean the muffler or bbq it , if that does not cure the problem you may have a stuck valve and need to pull the valve cover and check to see that the pushrods are working and not bent , if that still does not work you need to pull the head and check for a stuck valve.
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Old 06-28-2015, 10:24 AM   #7
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Default Re: Help need info.. Wont start!!

Found the problem.... took valve cover off & seen that a push rod came off.. Valve was not opening........ anyone know how to set valve lash ???


And a big thanks to all that gave time to advise...
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Old 06-28-2015, 01:55 PM   #8
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Default Re: Help need info.. Wont start!!

It's up & running again.. adjusted valve lash to .004 took a few try's but worth the time to recheck a few time's.. The G/kid's are tearin up the yard again. Makes me feel like the kids just visit to go cruise'in . lol
Proud G/Pap
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Old 06-28-2015, 02:14 PM   #9
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Default Re: Help need info.. Wont start!!

Glad you got it back going. Smiles all around is what it sounds like. Good deal
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Old 06-30-2015, 07:18 PM   #10
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Default Re: Help need info.. Wont start!!

thank you for checking back in its always nice to know problems get solved , so many times we throw answers out their and never hear from anyone.
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