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| need help with valves on a 21hp briggs v-twin | |
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xxXMowerdudeXxx Established Member
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| Subject: need help with valves on a 21hp briggs v-twin Sun 10 Mar 2013, 4:42 pm | |
| we got the one cylinder just perfect, but the other one is a pain, its backfiring through the carb. we unplugged the spark plugs to make sure it is the one we think it is and its the right one if you are in front of it, we had the intake clearances all the way up to .009 from .004, it got better, but should we just keep going till it quits or do the exsust need to be messed with too, please help. we're stumped | |
| | | Thunderdivine Veteran Member
Join date : 2012-12-21 Points : 6536 Posts : 2101 Location : Norway, Europe
| | | | Chopperhed Moderator
Age : 58 Join date : 2012-10-14 Points : 5247 Posts : 801 Location : Edmonton, Alberta, Canada Eh!
| Subject: Re: need help with valves on a 21hp briggs v-twin Sun 10 Mar 2013, 5:30 pm | |
| - xxXMowerdudeXxx wrote:
- we got the one cylinder just perfect, but the other one is a pain, its backfiring through the carb. we unplugged the spark plugs to make sure it is the one we think it is and its the right one if you are in front of it, we had the intake clearances all the way up to .009 from .004, it got better, but should we just keep going till it quits or do the exsust need to be messed with too, please help. we're stumped
It could be poor tuning, a bad plug or excess carbon build up on the piston and head. Set both valves to stock, and look for other problems. | |
| | | xxXMowerdudeXxx Established Member
2014 Build-Off Entrant
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Join date : 2013-01-28 Points : 4930 Posts : 599
| | | | Chopperhed Moderator
Age : 58 Join date : 2012-10-14 Points : 5247 Posts : 801 Location : Edmonton, Alberta, Canada Eh!
| | | | xxXMowerdudeXxx Established Member
2014 Build-Off Entrant
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Join date : 2013-01-28 Points : 4930 Posts : 599
| | | | Chopperhed Moderator
Age : 58 Join date : 2012-10-14 Points : 5247 Posts : 801 Location : Edmonton, Alberta, Canada Eh!
| | | | xxXMowerdudeXxx Established Member
2014 Build-Off Entrant
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Join date : 2013-01-28 Points : 4930 Posts : 599
| Subject: Re: need help with valves on a 21hp briggs v-twin Mon 11 Mar 2013, 7:07 pm | |
| i figured it out, its got to do with the diodes-kill wires, i pulled them off and it started to work fine
do you know where i could get some new ones, it looks like you just buy a new harnes, it also goes to the carb shutoff, then theres a plug at the other end
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| | | Doug Site Owner
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Age : 29 Join date : 2012-12-24 Points : 7775 Posts : 3047 Location : Lebanon County, PA
| Subject: Re: need help with valves on a 21hp briggs v-twin Mon 11 Mar 2013, 7:10 pm | |
| Whats wrong with your wires exactly?
By diode im assuming you mean the carb fuel solenoid. For mine instead of messing with it I just put one end to ground (already was on ground) and the other to a positive source. Head Forum Administrator ** Chat Moderator ** Facebook Page AdminATLTF Facebook Page ** Chatbox ** How To Upload Pictures
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| | | xxXMowerdudeXxx Established Member
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Join date : 2013-01-28 Points : 4930 Posts : 599
| Subject: Re: need help with valves on a 21hp briggs v-twin Mon 11 Mar 2013, 7:59 pm | |
| - Doug Fackler wrote:
- Whats wrong with your wires exactly?
By diode im assuming you mean the carb fuel solenoid. For mine instead of messing with it I just put one end to ground (already was on ground) and the other to a positive source. the wires that come off the coil go to a diode and merge to go to the other things, the diodes are bad and they were cross talking each the causing it to backfire, i un plugged the two wires and it works perfectally fine now | |
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