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Hot!tecumseh vtwin starts then dies carb issues ????

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kcmower
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2017/04/10 00:18:58 (permalink)
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tecumseh vtwin starts then dies carb issues ????

10 year old 22hp vtwin dual carbs.   Starts then dies.  Replaced fuel pump.  Lines have gas in them at the carb intake.  The carbs will let some gas in the bowls then runs till empty.  If you take the bowl container off its empty.  If you lift the float gas squirts in.  Next thought was solenoids.  They are making noise and i can feel them working.  Thought about bypassing but for both of them to go bad???  So whatever reason im not getting gas into the carbs.  Very frustrating as this engine only has like 70hrs on it, if that.  Thanks for ideas!

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    Roy
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/10 12:54:54 (permalink)
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    Are the fuel lines in good condition? They should be quite firm, if spongy they are collapsing and restricting the fuel flow.
    kcmower
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/10 18:23:17 (permalink)
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    Thanks Roy.  The lines feel firm to me.  Even though ive pulled them off the carbs to see that they have fuel in them I havent turned it over with them disconnected to see how much is coming out I should try that.  Sadlr tonites the start of my workweek and I have priority projects so might be a bit before a repost.  In the meantime if you or anyone else have further suggestions please feel free.  I really need to get it going my jd is getting a bit old idea is to have another ready to go.  Thanks again and I will repost when I get to it.
    Mikel1
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/11 23:47:17 (permalink)
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    Not a bad idea to check fuel flow to the carbs, also I would check for debris in fuel tank/ hoses if fuel flow is suspect.
    kcmower
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/14 18:39:59 (permalink)
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    Thanks.  Latest update....
    I just took the fuel lines off both carbs.  There is one line from the pump that goes to a T and it feeds each carb with a seperate line.  When I turn it over theres a pretty good stream coming out 1 hose while in the upright position.  When you block it the gas flows out the other one.  Im thinking this is normal but im just stating it in case normal is fuel flying out both lines lol.  I would think it would just sputter on one cylinder if it were the problem.  
    kcmower
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/14 18:50:06 (permalink)
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    In other news, as a kid I always had go karts.  I always hated the tecumsehs because eveyone of them always had carb issues.  Now 35 years later I have one that has some sort of fuel issue and has twin carbs to boot its like my worst nightmare.  The briggs always ran great, the briggs I have now has been running strong over ten seasons.  I really shot myself in the foot buying this.  I had an easier time getting my mac 101AA kart engines running and thats sad lol.
     
    kcmower
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/14 20:25:19 (permalink)
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    Also, after about 2 dz starting attempts the engine didnt die.  I thought the problem worked itself out.  I let it run on full throttle for ten minutes.  Shut it off, now wont start and bowls are dry again.  See if you can read my mind lol.
    kcmower
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/15 10:38:12 (permalink)
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    Im starting to wonder if I should put on a spark plug wire tester ans see if the current continues after it dies?
    Mikel1
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/15 12:21:06 (permalink)
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    So will it continue to run if you don't shut it off?
    kcmower
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/15 19:58:14 (permalink)
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    No.  It only stayed running one time out of many attempts and then went right back to what it was doing.  I was curious when it starts and then dies, on its own, if thers still spark going to the plugs.  In other words an electrical issue.  I dont think thats it but at this point in time im getting close to trying anything including the scrap pile.
    kcmower
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/16 09:09:41 (permalink)
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    Mike
    That one time it ran for ten minutes, yes, it ran till i shut it off.  But then i tried to start it right after i shut it off and it wouldnt start and sent my back to the same problem.  Sorry for the confusion.
    Ive read elsewhere the carbs are junk and it runs great with new carbs.  But then i read you have to synchronize the carbs.  Lol youve got to be kidding me.  Im considering selling this entire mess for 100.00 to offset the murray im paying 150 fot tmrow however the murray is a race mower project.  I need a backup mower but with used ones in working shape all over for 300 to 500 im not wanting to put much into this one and then still have problems.  I was just hoping to get a quick and easy fix haha.
    Mikel1
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/18 23:36:20 (permalink)
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    If you had an inline spark tester, the one with the small bulb works well. Then you could at least check one side.
    So will it keep running if you sprayed some carb cleaner into one carb. Might give you an answer, really sounds fuel related.
    kcmower
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/23 01:59:28 (permalink)
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    Ok, i finally fixed it!  Not convinced the new fuel pump was working as well as it should, i ran a direct gas line and held the gas tank high, making it gravity feed. Worked great!  I then cleaned out the fiting on the engine that goes to the pump.  Now it works!  All this fuss over something so simple.  But am i happy!
    kcmower
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/23 19:11:49 (permalink)
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    I got to thinking, this mower is around 15 years old.  My how time flys lol.  To me it still seems new it only has 72hrs.  Im excited cause I know I can get several years out of it.  My jd L118 is 12 with several hundred hours still runs great.  I did rebuild the deck last year.  Oil and air filters every season, sometimes twice.  I just need to blow up the white diagram and order a few things, namely belts as i hit a fence lying in tall grass and that was the start of my problems.  May need a new hydro fan i gotta check.
     
    I love this site, the forums and diagrams linked to parts ordering is great!
    Mikel1
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    Re: tecumseh vtwin starts then dies carb issues ???? 2017/04/23 21:18:25 (permalink)
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    Sounds great, glad you got it.
    A fence, ouch.
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