| 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! | |
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+7Chopperhed Doc Sprocket Marines2621 MowBandit Stretch44875 xxXMowerdudeXxx fletch6393 11 posters |
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fletch6393 Member
Age : 28 Join date : 2013-05-15 Points : 4224 Posts : 48 Location : salt lake city utah
| Subject: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! May 15th 2013, 10:17 am | |
| I have a 18 hp briggs and stratton 2 cylinder opposed engine. it runs and idles ok... i guess... i have to run it with about a third of the choke pulled out otherwise it dies. when ever i put it in gear and go it kicks and all power gos really low and the engine sounds like its going to die but then it keeps going but i only get half or a third power and it runs really slow. have any ideas why this is? or what i can do about it? | |
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xxXMowerdudeXxx Established Member
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fletch6393 Member
Age : 28 Join date : 2013-05-15 Points : 4224 Posts : 48 Location : salt lake city utah
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xxXMowerdudeXxx Established Member
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| Subject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! May 15th 2013, 10:33 am | |
| Well to check the sprk, its the easyest, get it running, take a plyers and pull one of the spark wires, it should keep running but rough, if its only running on one cilander it will die, do the same for both, to start out with, let me know what happens, dont use ur fingers, sparks hurt, lol
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xxXMowerdudeXxx Established Member
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fletch6393 Member
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Stretch44875 Administrator
Age : 49 Join date : 2012-04-05 Points : 5657 Posts : 959 Location : Mansfield, Ohio
| Subject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! May 15th 2013, 11:15 am | |
| Need to carefully and fully clean carburetor, especially if it has been sitting for a while, or take if off and have a mower shop clean/rebuild it.
Pull plugs, and lay them against side of engine so they are grounded to engine. Crank engine over like you are starting it, should have a nice blue sparks from both plugs. Don't hold on to them with you hands, they will shock you.
Put new plugs in.
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fletch6393 Member
Age : 28 Join date : 2013-05-15 Points : 4224 Posts : 48 Location : salt lake city utah
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fletch6393 Member
Age : 28 Join date : 2013-05-15 Points : 4224 Posts : 48 Location : salt lake city utah
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Stretch44875 Administrator
Age : 49 Join date : 2012-04-05 Points : 5657 Posts : 959 Location : Mansfield, Ohio
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fletch6393 Member
Age : 28 Join date : 2013-05-15 Points : 4224 Posts : 48 Location : salt lake city utah
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xxXMowerdudeXxx Established Member
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fletch6393 Member
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MowBandit Member
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| Subject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! May 15th 2013, 7:12 pm | |
| it will not hurt the engine in anyway and i can tell you its not the coil it sounds like its the carb because it wouldnt be running if it was the coil ive gone thru 2 coils but they where china coils i got a OEM briggs coil and my engine runs great aftea ton of mods done to it lol but anywho its your carb now get your self a carb rebuild kit that matchs your engine numbers those numbers are on the shroud and dothis inside your house at the table under a bright light s you can see if you drop any parts you can see where they land ive rebuilt my carb eh once and it started to act crazy again then i just bought some carb cleaner and i hanvnt had the problom again | |
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xxXMowerdudeXxx Established Member
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Marines2621 Member
Age : 27 Join date : 2012-12-31 Points : 4539 Posts : 215 Location : Mountainburg, Arkansas
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MowBandit Member
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| Subject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! May 16th 2013, 12:34 am | |
| - xxXMowerdudeXxx wrote:
- jay it can still be the coil.....
if it was the coil it wouldnt fire at all due to so much fuel goin into the engine at choke it would just stall if he has to run it with choke thas a carb problom and those coils are made where both pistons spark at the same time | |
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fletch6393 Member
Age : 28 Join date : 2013-05-15 Points : 4224 Posts : 48 Location : salt lake city utah
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MowBandit Member
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Doc Sprocket Site VIP
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Age : 51 Join date : 2013-04-21 Points : 7274 Posts : 2914 Location : Ontario Canada
| Subject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! May 16th 2013, 9:40 pm | |
| I'm pretty much on board with Jay Rod. Sounds like your carb is stuffed. A good cleaning should to the trick- try it before you order a rebuild kit. I have serviced a LOT of carbs, and very, very rarely do you ever actually need a kit. The first place to look (in your carb) is the main jet. Carefully poke a bit of fine wire through it to make sure there's no debris in there.
While you're at it, make sure that your fuel filter (if you have one- and you should!) isn't bunged up. Also keep in mind that there's a diaphragm-style fuel pump on the front of your carb, and it IS possible that it's time to rebuild it. For that, you WILL need a kit. | |
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MowBandit Member
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fletch6393 Member
Age : 28 Join date : 2013-05-15 Points : 4224 Posts : 48 Location : salt lake city utah
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Stretch44875 Administrator
Age : 49 Join date : 2012-04-05 Points : 5657 Posts : 959 Location : Mansfield, Ohio
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MowBandit Member
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| Subject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! May 18th 2013, 1:05 pm | |
| - Stretch44875 wrote:
- Just a note, I've had these twin wire coil's go bad, and the engine still kinda of ran/started, just really poorly.
ive had mine go bad on my monster opposed twin and started but i had to keep the throttle maxed out or it would die it wouldnt even idle so im pretty sure its his carb ecause he has to use choke or else it dies so that should tell you that its starving for fuel | |
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Chopperhed Moderator
Age : 58 Join date : 2012-10-14 Points : 5210 Posts : 801 Location : Edmonton, Alberta, Canada Eh!
| Subject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! May 18th 2013, 4:22 pm | |
| - Stretch44875 wrote:
- Just a note, I've had these twin wire coil's go bad, and the engine still kinda of ran/started, just really poorly.
The carb is the first place to start. However, I have seen situations where a high tension coil wire breaks internally with no evidence on the outside. There are repair kits available for breaks mid wire, but breaks at the coil itself require more work. This is a common issue on old bikes. I've seen vids of guys that have gouged out the epoxy from around the wire, and soldered on new leads, then re epoxied the hole. | |
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| 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! | |
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