Carby has anyone tryed puting a walbro carb on an GRUBEE SkyHawk GT5 66cc/80cc

Discussion in '2-Stroke Engines' started by rustygod420, Apr 22, 2012.

  1. rustygod420

    rustygod420 New Member

    i have a tuneable walbro carb and id like to know how and if i can use it on my GRUBEE SkyHawk GT5 66cc/80cc
     

  2. tooljunkie

    tooljunkie Member

    i am presently working on the same thing.
    what size /model walbro you plan on using?
    a friend gave me a boxful to pick through,he does chainsaw/trimmer repairs.
    i made the base plate,drilled the impulse hole and cut a gasket.
    its steel,about 5/8" thick so i can drill and tap for carb and cable controls.
    i will be using a short pipe and a section of hose to graft it onto existing manifold.
     
    Last edited: Apr 22, 2012
  3. rustygod420

    rustygod420 New Member

    its for a go pad , and i made an intake tube out of some tube steel and sheet metal, mount it , and man it looks kool but im not sure if it has a return line or what l
     
  4. tooljunkie

    tooljunkie Member

    ok,what model is the carb?
    this will help.
    there are letters on the side,like hda,or hdc.
    some carbs arent big enough to run a 66 cc engine.
    the second line is for impulse to run fuel pump,you can achieve the pulse from the intake manifold,methinks.
     
  5. rustygod420

    rustygod420 New Member

    all i se is "WT 051
    813a
     
  6. tooljunkie

    tooljunkie Member

    http://www.walbro.com/brochurefiles/3368437154-Diaphragm broch final 12-16-03.pdf

    this is a link to the walbro brochure,defining models.
    the one you have is for displacements 14-50 cc engines.might be a little lean.
    if you could get yoour hands on an HDA carb,its good to 60cc's
    the ideal is a WJ,good for 50-100cc's.i will be taking pics of my mock-up when i get a chance.
    i'm going to dig around another site,there is a diaphram kit to put on a bike.it should accept a walbro carb.

    thatsdax.com has a kit for four stroke motors,i'm not sure why it wouldnt work on a two stroke.
    19.99 just add carb.
     
    Last edited: Apr 23, 2012
  7. rustygod420

    rustygod420 New Member

    hahaha made my intake an inch to long have to cut the welds and knock and inch off and try agin, pics as soon as its on the bike
     
  8. rustygod420

    rustygod420 New Member

    I DID IT !!!!!!! and i have pics
     
  9. tooljunkie

    tooljunkie Member

    where??
    i wanna see!!
     
  10. rustygod420

    rustygod420 New Member

    just go to my profile look at my album called homegrown parts ,
     
  11. tooljunkie

    tooljunkie Member

    looks good,did you run it yet?
    i am curious to see what the end result is.
    i been too busy to work on mine,working on my homegrown pull-type mower.i drag a second mower behind to get an eight foot cut.9 acres takes too long.
     
  12. rustygod420

    rustygod420 New Member

    i did run it alil, i had not hand contorls yet , it revd right up nice and quick,and didnt sem so shakey as befor,and as for your mower , thats cool as ****
     
  13. rustygod420

    rustygod420 New Member

    took it for a ride last nite tons!!! smoother power from low end on up BUT !!!! its not 100% my impluse line came out makeing for a ify ride back home
     
  14. tooljunkie

    tooljunkie Member

    i'll be working on mine this weekend,hopefully a test ride sunday.
     
  15. rustygod420

    rustygod420 New Member

    it revs great smooth power , but the carb i have is in fact to small and i had to use a hose clamp around the pluse tube to keed it in but i will be gettint the right size carb, then unlike my stock carb no more bowl drian at top end drawn out runs
     
  16. vermhot

    vermhot Member

    Do you need that intake that long ??!!!
     
  17. dchevygod

    dchevygod Member

    Rusty... for one that intake is way too long, it won't idle for ****, for two the line you have hooked up to the manifold is the fuel return fitting not the pulse line. The walbro wt813 is manifold pulsed, you will have to add a barbed fitting to the metering plate to get it pulsed. If that runs at all I bet you wondering why it dies after a lil full throttle. Its not pumping fuel. your setup won't pulse from the manifold, you need to drill your head down into the crankcase for the pulse in any carb you use. You should look at getting a hda-223 it will work good for ya and the plastic manifold will work on the china girl engines after you drill the pulse hole.
     
  18. dchevygod

    dchevygod Member

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