| | Backfires when brought to low idle | |
| | Author | Message |
---|
kieranruffell Member
![Member Member](https://i.servimg.com/u/f62/19/56/75/89/g110.png)
2014 Build-Off Entrant
2014 Build-Off Entrant
Age : 24 Join date : 2014-01-22 Points : 3897 Posts : 43 Location : Whangarei, New Zealand
![Backfires when brought to low idle Empty](https://2img.net/i/empty.gif) | Subject: Backfires when brought to low idle January 26th 2014, 4:21 pm | |
| My kohler 12.5hp backfires when throttled down to low idle. Any suggestions on how to fix this. Thanks | |
| ![Go down](https://2img.net/i/empty.gif) | | willis923 Veteran Member
![willis923](https://2img.net/u/2812/37/66/46/avatars/835-97.jpg)
![Veteran Member Veteran Member](https://i.servimg.com/u/f62/19/56/75/89/g510.png)
Age : 27 Join date : 2013-04-10 Points : 5644 Posts : 1408 Location : Galway NY
![Backfires when brought to low idle Empty](https://2img.net/i/empty.gif) | | ![Go down](https://2img.net/i/empty.gif) | | TroyBilt Pony Established Member
![TroyBilt Pony](https://2img.net/u/2812/37/66/46/avatars/942-63.jpg)
![Established Member Established Member](https://i.servimg.com/u/f62/19/56/75/89/g310.png)
2014 Build-Off Entrant
2014 Build-Off Entrant
Join date : 2013-06-01 Points : 4693 Posts : 578 Location : West Virginia
![Backfires when brought to low idle Empty](https://2img.net/i/empty.gif) | | ![Go down](https://2img.net/i/empty.gif) | | Lawren Wimberly Established Member
![Lawren Wimberly](https://2img.net/u/2812/37/66/46/avatars/1273-1.jpg)
![Established Member Established Member](https://i.servimg.com/u/f62/19/56/75/89/g310.png)
2014 Build-Off Entrant
2014 Build-Off Entrant
Age : 57 Join date : 2013-12-21 Points : 4688 Posts : 744 Location : Salem Illinois
![Backfires when brought to low idle Empty](https://2img.net/i/empty.gif) | Subject: Re: Backfires when brought to low idle January 26th 2014, 4:50 pm | |
| probably not enough lash in the intake valve. The plug actually fires on the exhaust stroke too... if there is sufficient fuel still in the exhaust, it will fire out of turn
| |
| ![Go down](https://2img.net/i/empty.gif) | | kieranruffell Member
![Member Member](https://i.servimg.com/u/f62/19/56/75/89/g110.png)
2014 Build-Off Entrant
2014 Build-Off Entrant
Age : 24 Join date : 2014-01-22 Points : 3897 Posts : 43 Location : Whangarei, New Zealand
![Backfires when brought to low idle Empty](https://2img.net/i/empty.gif) | | ![Go down](https://2img.net/i/empty.gif) | | willis923 Veteran Member
![willis923](https://2img.net/u/2812/37/66/46/avatars/835-97.jpg)
![Veteran Member Veteran Member](https://i.servimg.com/u/f62/19/56/75/89/g510.png)
Age : 27 Join date : 2013-04-10 Points : 5644 Posts : 1408 Location : Galway NY
![Backfires when brought to low idle Empty](https://2img.net/i/empty.gif) | | ![Go down](https://2img.net/i/empty.gif) | | Doc Sprocket Site VIP
![Doc Sprocket](https://2img.net/u/2812/37/66/46/avatars/863-5.png)
![Site VIP Site VIP](https://i.servimg.com/u/f86/19/98/54/71/vip11.png)
2018 Build-Off Entrant
2018 Build-Off Entrant
2021 Winner of Winners
2021 Winner of Winners
1st Place Build-Off 2016
1st Place Build-Off Winner 2016
Age : 51 Join date : 2013-04-21 Points : 7201 Posts : 2914 Location : Ontario Canada
![Backfires when brought to low idle Empty](https://2img.net/i/empty.gif) | Subject: Re: Backfires when brought to low idle January 26th 2014, 7:28 pm | |
| First place I'd look is the mixture, may well be on the lean side. I've had engines do this after instaling a free-flow exhaust system, before I'd had the chance to adjust the mixture to suit. | |
| ![Go down](https://2img.net/i/empty.gif) | | T-Dub13 Established Member
![T-Dub13](https://2img.net/u/2812/37/66/46/avatars/1235-78.jpg)
![Established Member Established Member](https://i.servimg.com/u/f62/19/56/75/89/g310.png)
Age : 54 Join date : 2013-12-06 Points : 4455 Posts : 540 Location : Central MA
![Backfires when brought to low idle Empty](https://2img.net/i/empty.gif) | Subject: Re: Backfires when brought to low idle January 27th 2014, 2:45 pm | |
| Lean. Most likely the carb like most are saying. The other major cause of backfiring is an exhaust leak. Air getting inside the exhaust system then you let off of the throttle. Is your exhaust tight and not leaking? | |
| ![Go down](https://2img.net/i/empty.gif) | | kieranruffell Member
![Member Member](https://i.servimg.com/u/f62/19/56/75/89/g110.png)
2014 Build-Off Entrant
2014 Build-Off Entrant
Age : 24 Join date : 2014-01-22 Points : 3897 Posts : 43 Location : Whangarei, New Zealand
![Backfires when brought to low idle Empty](https://2img.net/i/empty.gif) | Subject: Exhaust January 27th 2014, 3:03 pm | |
| I have recently replaced both bolts and the exhaust gasket. I am pretty sure there are no holes in the exhaust and the bolts are tight. Thanks for the tips. ![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
Last edited by kieranruffell on January 27th 2014, 3:07 pm; edited 1 time in total | |
| ![Go down](https://2img.net/i/empty.gif) | | kieranruffell Member
![Member Member](https://i.servimg.com/u/f62/19/56/75/89/g110.png)
2014 Build-Off Entrant
2014 Build-Off Entrant
Age : 24 Join date : 2014-01-22 Points : 3897 Posts : 43 Location : Whangarei, New Zealand
![Backfires when brought to low idle Empty](https://2img.net/i/empty.gif) | Subject: Carb January 27th 2014, 3:05 pm | |
| Last night i cleaned the carb just need to find time to put it back on and readjust it. Hopefully it makes a difference. | |
| ![Go down](https://2img.net/i/empty.gif) | | Sponsored content
![Backfires when brought to low idle Empty](https://2img.net/i/empty.gif) | | ![Go down](https://2img.net/i/empty.gif) | | | Backfires when brought to low idle | |
|
Similar topics | ![+](https://2img.net/i/fa/responsive/icons/mini/plus-square.png) |
|
| Permissions in this forum: | You cannot reply to topics in this forum
| |
| |
| Who is online? | In total there are 59 users online :: 0 Registered, 0 Hidden and 59 Guests
None
Most users ever online was 412 on January 7th 2023, 7:59 am
|
|