Cracked Husqvarna 350BT Engine Block

admin

I am currently in the middle of a mini dirt bike build and I'm using this Husqvarna two-stroke motor; unfortunately the mounts I built put unnecessary amounts of stress on the lower part of the engine and it sent a little hairline fracture down the side. I am considering tig brazing the crack but this would be a first for me and I was wondering if anyone experienced in such repairs could recommend amperage, the correct filler alloy, etc. I'm not entirely sure what the block is made of on these small engines, obviously some kind of cast metal but I myself do not know what it is. Any help would be appreciated (alternative solutions etc).Century FC-90Primeweld TIG 200D
Reply:

Originally Posted by GoK4rtFanatic


I am currently in the middle of a mini dirt bike build and I'm using this Husqvarna two-stroke motor; unfortunately the mounts I built put unnecessary amounts of stress on the lower part of the engine and it sent a little hairline fracture down the side. I am considering tig brazing the crack but this would be a first for me and I was wondering if anyone experienced in such repairs could recommend amperage, the correct filler alloy, etc. I'm not entirely sure what the block is made of on these small engines, obviously some kind of cast metal but I myself do not know what it is. Any help would be appreciated (alternative solutions etc).
Reply:It is die casting Looks like a TIG job with luck .Dave

Originally Posted by 52 Ford

What about torch brazing it? Looks like alooominum. I've heard that Muggy Weld makes some good low temp brazing alloys for cast aluminum. https://www.muggyweld.com/products/Sent from my Lincoln Buzzbox using Tapatalk