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Question Sharp Innova mk2

Discussion in 'Vintage collectable airguns' started by ambriel, Jul 7, 2014.

  1. ambriel

    ambriel Engaging Member

    Messages:
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    Location:
    NW Highlands, Scotland
    Any other Sharp Innova owners in the house?

    I recently bought a mk2 which I'm very impressed with. It's a lovely little gun.

    I've got a few questions, though, that I hope some of the collected wisdom of the forum can answer for me.

    When were these guns for sale? I've done a lot of Googling but haven't been able to find this out yet.

    What power should it be delivering? It only takes three or at most four pumps before the pressure valve starts farting but appears to be holding pressure just fine once charged.

    The O-ring on the bolt looks like it could do with replacing. I've already figured out how to strip most of the rifle down but do I just release the screw on the back end of the block to release the bolt?

    The lever feels spring-loaded so I haven't tried undoing it yet in case things fly out that I can't put back.
     
  2. ambriel

    ambriel Engaging Member

    Messages:
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    Location:
    NW Highlands, Scotland
    Oh and I could do with the rear sight unit if anyone has one laying around.
     
  3. Damon

    Damon Posting Addict

    Messages:
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    Location:
    Ferndale Wales
    They were fantastic little rifles in their day. I purchased a brand new one in 1985 and it cost me about £70 if I remember correctly. Not sure if mine was a Mk1 or a Mk2 but it was deadly accurate super light and powerful enough to bring down lots of bunnies. I'd love another one if an immaculate one came up.
     
  4. flatrajectory

    flatrajectory Keyboard Hero

    Messages:
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    Location:
    Telford
    They were for sale from the mid 80's to mid 90's approximately, and are as you say very well made.
    In order to remove the bolt/probe you have to remove the bolt latch pivot screw,bolt latch and latch spring. What I do is first remove the latch spring using a small jewellers screwdriver to pull it upwards out of its slot....then remove the latch screw and wiggle the latch out of the receiver, the bolt and spring will then pop out.
    With regards to power ,the Innova is capable of over the limit power which is why there is a blow off valve fitted in the pump head to limit the power. Depending on calibre, the .22 should blow off at around 6 or 7 pumps and the .177 at 7 or 8 pumps. It sounds as though yours needs adjusting to give more power. I am not going to tell you how to do it but it is fiddly and time consuming ( though very straightforward) to get
    It spot on.
    For spares and an exploded diagram visit TW Chambers excellent website and look under air rifle spares.
    Best off luck with your new purchase.
    Pete.
     
  5. ambriel

    ambriel Engaging Member

    Messages:
    253
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    Location:
    NW Highlands, Scotland
    Thanks guys, I love it even though I have other airguns. I'll take a close look at the latch assembly with a magnifying glass before starting to disassemble it.

    I've had a good look at the blow-off/transfer valve assembly on the exploded diagram and think I can see how it works. I wouldn't want to push it beyond 12fpe but it's useful to know how many pumps it's supposed to take. Mine is a .22, incidentally.
     
  6. ambriel

    ambriel Engaging Member

    Messages:
    253
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    Location:
    NW Highlands, Scotland
    Well I'm pleased to say I found out why my Innova was dumping air prematurely and have fixed it.

    Having stripped the gun to its component parts and comparing them to the exploded diagrams available it was clear that an O-ring and a small washer were missing from the pressure reservoir and it was this that was allowing air to escape. The O-ring provides the seal, presumably, and the washer protects the O-ring from damage by the inlet valve spring. Fortunately I had both available in suitable sizes so popped them in and put her back together.

    She now takes six or seven strokes happily (so long as I can manage it!) and feels like she's delivering a reasonable yet not excessive/illegal amount of power. I'm going to check with a chrono, though, just to be on the safe side.

    It really is a nice gun to fire and coupled with a Whisper 130 moderator is very quiet.
     
  7. landymick

    landymick Big Poster

    Messages:
    3,552
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    Location:
    Sheffield
    Sounds like you've cracked it,they are a very accurate & powerful or can be.Early MKl was £55.00 from Litts has made in Japan on receiver & no butt pad.
     

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