Type of Aluminum on a carb mount

admin

The only welding I've done with aluminum is with new 3003 or 6061. But I'm slowing getting more jobs that are requiring repairs. Usually these projects have old welds or factory welds on them. But I got a customer shows up today with the attached pic:Asking me to plug up the hole, I advised against it because I don't thing this can be welded. My solution was a possible plug and some type of epoxy. He was strong that he wanted it welded, but we agreed to give me a couple days to sort this out. What are your thoughts on this? Judging from the bolts and machining marks, I say not weldable.
Reply:what hole does he want welded and why?Of all the things I lost I miss my mind the most...I know just enough about everything to be dangerous......You cant cure stupid..only kill it...
Reply:the one with the screw next to it I assume?Of all the things I lost I miss my mind the most...I know just enough about everything to be dangerous......You cant cure stupid..only kill it...
Reply:I believe there was a pressed in brass air hose fitting there.  I've had a few of those Webber 2bbls... I think they have a magnesium alloy.
Reply:A nice stainless fastener would look good in that spot.Some aircraft fuel tank sealant (Aircraft Spruce carries the small kits) would seal the inside just fine.
Reply:Sorry about the mix up, and you guessed it, the hole next to the bolt.  SS bolt with the sealant will work out just fine. Thanks for the input
Reply:If the hole goes all the way through, tap it and use the bolt/sealant.Syncro 250 DX Dynasty 200 DXMM 251 w/30A SG XMT 304 w/714 Feeder & Optima PulserHH187Dialarc 250 AC/DCHypertherm PM 1250Smith, Harris, Victor O/ASmith and Thermco Gas MixersAccess to a full fab shop with CNC Plasma, Water Jet, etc.