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#84671 - 20/04/17 04:02 PM Better Seal for Primer Cap on G4
tiger Offline
Qualified Senior
Registered: 11/03/08
Posts: 583
Loc: Melbourne
My goto machine had a small leak under the primer cap, so got a new cap, oring etc. and the cap I believe is slightly warped preventing me from getting a seal that will stop petrol leaking. I have tried different amounts of tension on the main jet screw which holds it all together but the leak is still there. Before I go out and purchase another cap, is there something I can do in the meantime to get a better seal?
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#84674 - 20/04/17 05:30 PM Re: Better Seal for Primer Cap on G4 [Re: tiger]
Mowerfreak Online   content
Qualified Junior
Registered: 07/02/06
Posts: 414
Loc: Woy Woy
Gunk where the seal sits on the carb body? Maybe a fine crack or a burr.
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#84678 - 20/04/17 06:13 PM Re: Better Seal for Primer Cap on G4 [Re: tiger]
NormK Offline
Junior Technician
Registered: 04/01/16
Posts: 1624
Loc: Melbourne
Tiger, another option is if you come over to my place and we pick another body and see if we can get a seal. Are you sure it is not leaking as a result of a dodgy float needle. If that is the case and it often is, there is not much I can do about those dodgey little things, they frustrate me more than you can imagine
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#84682 - 20/04/17 08:49 PM Re: Better Seal for Primer Cap on G4 [Re: tiger]
tiger Offline
Qualified Senior
Registered: 11/03/08
Posts: 583
Loc: Melbourne
Thanks guys, no gunk as I cleaned out carb body. Carb body seems fine, I can't see any cracks or burrs. The new primer cap has a slight warp, I have checked with a ruler. I guess that some silicone won't hold up to bridge the gap and I'll probably need something like some liquid gasket but I don't want to buy a tube just for this. I have ordered another cap but I just want to get the lawn mowed.
Norm, thanks for the offer but I have 2 family members in hospital so a little restricted at the moment.
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#84684 - 20/04/17 09:06 PM Re: Better Seal for Primer Cap on G4 [Re: tiger]
NormK Offline
Junior Technician
Registered: 04/01/16
Posts: 1624
Loc: Melbourne
Tiger, silicone may hold long enough for you to get the lawns cut, remember you only have to come up half way because that is as high as the float will allow the fuel to fill the chamber. Such a great motor let down by dodgey replacement parts


Edited by NormK (20/04/17 09:07 PM)
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#84686 - 21/04/17 12:45 AM Re: Better Seal for Primer Cap on G4 [Re: tiger]
Mowerfreak Online   content
Qualified Junior
Registered: 07/02/06
Posts: 414
Loc: Woy Woy
You are better off scavenging bits from old wrecks as they are likely to be the older Australian made parts.
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#84730 - 21/04/17 10:22 PM Re: Better Seal for Primer Cap on G4 [Re: tiger]
tiger Offline
Qualified Senior
Registered: 11/03/08
Posts: 583
Loc: Melbourne
Thinking of getting the heat gun onto it, only slightly warped so heat should fix it.
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#84733 - 21/04/17 11:07 PM Re: Better Seal for Primer Cap on G4 [Re: tiger]
ihatewetsocks Offline
Apprentice level 4
Registered: 03/04/15
Posts: 311
Loc: Adelaide, South Australia
Hi Tiger,

If it's an ebay jobby I have found that there are a few batches on 1.6mm o'rings that don't seal. the 1.8mm do but (correct me if I'm wrong) the genuine Victa ones are 2mm. I would be trying a genuine oring before shooting it with a heat gun.

Pete.
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#84756 - 22/04/17 09:06 PM Re: Better Seal for Primer Cap on G4 [Re: ihatewetsocks]
tiger Offline
Qualified Senior
Registered: 11/03/08
Posts: 583
Loc: Melbourne
Hi Pete,

The o-ring is 1.8 mm, it looks fine to me, cap definitely dodgy.
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