All-Terrain Lawn Tractor Forum
Would you like to react to this message? Create an account in a few clicks or log in to continue.

All-Terrain Lawn Tractor Forum

Like riding lawn tractors through mud, woods, rocks, and snow? Then this is the place for you! Share your ideas, Post your projects and more!
 
PortalHomeSite RulesEventsFAQSearchRegisterLog inBuild-Off

 

 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!

Go down 
+7
Chopperhed
Doc Sprocket
Marines2621
MowBandit
Stretch44875
xxXMowerdudeXxx
fletch6393
11 posters
Go to page : 1, 2  Next
AuthorMessage
fletch6393
Member
fletch6393
Member


Age : 27
Join date : 2013-05-15
Points : 4030
Posts : 48
Location : salt lake city utah

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 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?
Back to top Go down
xxXMowerdudeXxx
Established Member

Established Member

500+ Posts
500+ Posts
2014 Build-Off Entrant
2014 Build-Off Entrant

Join date : 2013-01-28
Points : 4699
Posts : 599

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 10:21 am

You could be running on one cilander, ik that those coils like to go bad, it may have a spark but could be a weak spark, or it could be fuel related issues, dirty carb, or bad air to gas ratio, soulds like its running on one cilander
Back to top Go down
fletch6393
Member
fletch6393
Member


Age : 27
Join date : 2013-05-15
Points : 4030
Posts : 48
Location : salt lake city utah

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 10:30 am

ok so how do i check to see if it IS running on one cylinder? also how do i fix the spark? and hopw do i fix the bad air to gas ratio?
Back to top Go down
xxXMowerdudeXxx
Established Member

Established Member

500+ Posts
500+ Posts
2014 Build-Off Entrant
2014 Build-Off Entrant

Join date : 2013-01-28
Points : 4699
Posts : 599

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 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
Back to top Go down
xxXMowerdudeXxx
Established Member

Established Member

500+ Posts
500+ Posts
2014 Build-Off Entrant
2014 Build-Off Entrant

Join date : 2013-01-28
Points : 4699
Posts : 599

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 10:33 am

To see if its running on on cil
Back to top Go down
fletch6393
Member
fletch6393
Member


Age : 27
Join date : 2013-05-15
Points : 4030
Posts : 48
Location : salt lake city utah

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 10:37 am

ok thanks ill try that today. now im gonna guess that it does have a bad gas to air ratio because i got it used and it was in pretty bad shape. how do i fix THAT?
Back to top Go down
Stretch44875
Administrator
Stretch44875
Administrator

500+ Posts
500+ Posts

Age : 49
Join date : 2012-04-05
Points : 5463
Posts : 959
Location : Mansfield, Ohio

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 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.

Back to top Go down
fletch6393
Member
fletch6393
Member


Age : 27
Join date : 2013-05-15
Points : 4030
Posts : 48
Location : salt lake city utah

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 11:18 am

ok. so the plug trick will test that and the carb rebuild will fix the air to gas ratio right?
Back to top Go down
fletch6393
Member
fletch6393
Member


Age : 27
Join date : 2013-05-15
Points : 4030
Posts : 48
Location : salt lake city utah

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 11:20 am

also i have some questions about a old tecumsah rotortiller/snowblower combo. is there anywhere HERE i can ask about that?
Back to top Go down
Stretch44875
Administrator
Stretch44875
Administrator

500+ Posts
500+ Posts

Age : 49
Join date : 2012-04-05
Points : 5463
Posts : 959
Location : Mansfield, Ohio

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 11:40 am

should. If it doens't spark on both new plugs, the coil is shot. I've had 2 of the opposed coils die on me.
Back to top Go down
fletch6393
Member
fletch6393
Member


Age : 27
Join date : 2013-05-15
Points : 4030
Posts : 48
Location : salt lake city utah

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 11:54 am

can i rebuild or repair a coil?? or do i have to buy a new one?
Back to top Go down
xxXMowerdudeXxx
Established Member

Established Member

500+ Posts
500+ Posts
2014 Build-Off Entrant
2014 Build-Off Entrant

Join date : 2013-01-28
Points : 4699
Posts : 599

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 12:11 pm

fletch6393 wrote:
can i rebuild or repair a coil?? or do i have to buy a new one?

U have to buy a new one
Back to top Go down
fletch6393
Member
fletch6393
Member


Age : 27
Join date : 2013-05-15
Points : 4030
Posts : 48
Location : salt lake city utah

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 3:38 pm

bummer. im flat broke. if i keep running it without replacing it will i blow the engine?
Back to top Go down
MowBandit
Member
MowBandit
Member

2014 Build-Off Entrant
2014 Build-Off Entrant

Age : 28
Join date : 2013-03-16
Points : 4511
Posts : 477
Location : Haddock,Georgia

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 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
Back to top Go down
xxXMowerdudeXxx
Established Member

Established Member

500+ Posts
500+ Posts
2014 Build-Off Entrant
2014 Build-Off Entrant

Join date : 2013-01-28
Points : 4699
Posts : 599

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 10:12 pm

jay it can still be the coil.....
Back to top Go down
Marines2621
Member
Marines2621
Member


Age : 26
Join date : 2012-12-31
Points : 4345
Posts : 215
Location : Mountainburg, Arkansas

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 15th 2013, 10:36 pm

My opposed does the same. Have to run it with choke on to idle. Runs hell good though. Turns 4000 rpms. Also the intake ports and exhaust ports of the motor could be clogged up. Never know.
Back to top Go down
MowBandit
Member
MowBandit
Member

2014 Build-Off Entrant
2014 Build-Off Entrant

Age : 28
Join date : 2013-03-16
Points : 4511
Posts : 477
Location : Haddock,Georgia

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 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
Back to top Go down
fletch6393
Member
fletch6393
Member


Age : 27
Join date : 2013-05-15
Points : 4030
Posts : 48
Location : salt lake city utah

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 16th 2013, 11:02 am

yeah i dont know. im trying to do this as cheap as possible.
Back to top Go down
MowBandit
Member
MowBandit
Member

2014 Build-Off Entrant
2014 Build-Off Entrant

Age : 28
Join date : 2013-03-16
Points : 4511
Posts : 477
Location : Haddock,Georgia

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 16th 2013, 3:48 pm

fletch6393 wrote:
yeah i dont know. im trying to do this as cheap as possible.
just rebuild the carb and your probloms should be cured
Back to top Go down
Doc Sprocket
Site VIP
Doc Sprocket
Site VIP

2500+ Posts
2500+ Posts!
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 : 50
Join date : 2013-04-21
Points : 7080
Posts : 2914
Location : Ontario Canada

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 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.
Back to top Go down
MowBandit
Member
MowBandit
Member

2014 Build-Off Entrant
2014 Build-Off Entrant

Age : 28
Join date : 2013-03-16
Points : 4511
Posts : 477
Location : Haddock,Georgia

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 16th 2013, 10:37 pm

how old is this mower also check for cracks in your fuel line if you got a few dry rotted cracks then i think the inside of your fuel line might be falling apart and could of cloged the fuel pump or one of the jets
Back to top Go down
fletch6393
Member
fletch6393
Member


Age : 27
Join date : 2013-05-15
Points : 4030
Posts : 48
Location : salt lake city utah

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 17th 2013, 3:46 pm

whats up?
Back to top Go down
Stretch44875
Administrator
Stretch44875
Administrator

500+ Posts
500+ Posts

Age : 49
Join date : 2012-04-05
Points : 5463
Posts : 959
Location : Mansfield, Ohio

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 18th 2013, 7:00 am

Just a note, I've had these twin wire coil's go bad, and the engine still kinda of ran/started, just really poorly.
Back to top Go down
MowBandit
Member
MowBandit
Member

2014 Build-Off Entrant
2014 Build-Off Entrant

Age : 28
Join date : 2013-03-16
Points : 4511
Posts : 477
Location : Haddock,Georgia

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 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
Back to top Go down
Chopperhed
Moderator
Chopperhed
Moderator

500+ Posts
500+ Posts

Age : 57
Join date : 2012-10-14
Points : 5016
Posts : 801
Location : Edmonton, Alberta, Canada Eh!

opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitimeMay 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.
Back to top Go down
http://http:\\members.shaw.ca\ducksgarage
Sponsored content





opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Empty
PostSubject: Re: 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!   opposed - 18hp briggs twin cylinder opposed power problems. PLEASE HELP!!! Icon_minitime

Back to top Go down
 
18hp briggs twin cylinder opposed power problems. PLEASE HELP!!!
Back to top 
Page 1 of 2Go to page : 1, 2  Next
 Similar topics
-
» 18HP briggs opposed twin
» Briggs opposed twin problems
» briggs and stratton 15hp twin cylinder governor Help?
» 18hp Twin Lacking Power!
» 11 hp Briggs or 14 hp twin cylinder opposing

Permissions in this forum:You cannot reply to topics in this forum
All-Terrain Lawn Tractor Forum :: Technical Forum :: Engine Tech :: Briggs and Stratton-
Jump to: