Welsh willy kit

Discussion in 'General Airgun Chat' started by jedi020, Jul 30, 2015.

  1. jedi020

    jedi020 Red Dwarf

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    Need some advice, I've just bought a new second hand welsh willy kit for my mk1 hw77 .177..

    Fitted it no probs, took the rifle to the range and chrono'd it and it's only doing 6.5flb, admittedly the kit was bought for a .22, could this be the cause of it running a bit on the low side :D

    James
     
  2. itsray

    itsray New Member

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    Have a look at your piston seal and breech seal because as far as I know the mainsprings are the same.
    Cannot say more without more details of what was done, when and by who.
    I have used many WW kits and never had any problems so first appearances it is the rifle that is the problem.
    You can PM me if you wish....and I will do what I can to help. ;)
     
  3. skires

    skires Well-Known Member

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    What was the 0.177 77 doing before you fitted the WW kit?
     
    Last edited: Aug 1, 2015
  4. jedi020

    jedi020 Red Dwarf

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    The rifle was hot 13.4flb, I stripped it with the intention of having a mate button it, anyhow as far as the piston & breech seal go they are used but look in good nic, everything I could polish internally I did, just to tidy thing up, before fitting the new kit..

    I used one of the shims in the kit, should I just fit more of them, a ten shot string over the chrono came back with on a 5fps spread.
     
  5. vinny

    vinny WHFTA 2015 World Champion

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    I put a ww kit in my txmk3 , it was fine other than a bit low about 740, bit variable on the chrono, put most of the spacers in and its 785 with about a 5fps spread , I did notice that where one end of the spring is dressed after using for a bit I took it out for s relube and it was bent slightly, hardly any tttwwwaaannngggg and much more controlled , mines good thanks Willy , very helpfull chap
     
  6. jedi020

    jedi020 Red Dwarf

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    Yeah vinny he's very helpful, I emailed him, and he thinks the same it could be seals, as there's not much difference in fps in both caliber kits.

    I just wonder how it's gone from hot to 10m just by cleaning and fitting a new kit, with no obvious signs.
     
  7. skires

    skires Well-Known Member

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    ..........
     
    Last edited: Aug 1, 2015
  8. blacklab

    blacklab Member

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    w willy kit

    revert back to the old setup and check the pwr to see if the pwr goes back up, if it does you know you have a problem with the welsh willy kit.
     
  9. jedi020

    jedi020 Red Dwarf

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    Solid advice, roll back...

    I'll post pics later.
     
  10. scrane

    scrane Member

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    Did you specify the 25mm bore when you ordered the kit?
     

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