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  1. #1
    Join Date
    Aug 2006
    near rochester NY

    Question brigs and straten engine case, magnesium ?? aluminum??

    i have a 17HP B&S mower engine casing i needed to weld up a few cracks on.
    i was told its cast aluminum, but seriously doubt it. i went to TIG it up like i have on many bike case's and got very different results. it kept popping out lil yellow specks or pebbles like salt sized, and popping. no way to get it to flow. just as it would get ready to go liquid it swell and would pop out junk. the only conclusion i could come to was its not aluminum but magnesium. any ideas on how to weld some thing like this or do you just get an aluminum brazing rod and go that way??? this thing just refused to accept heat without exploding?? i ended up using a brazing rod on it and got it to seal up. is there a better way?? i was thinking if i had to put a piece back in and seal it up i don't know that this would be an option ?? any of you guys deal with this stuff, if so whats the trick ??

    the pic's are befor i cleaned it up to weld. it was spotless when i started adding heat, thats just the way i got it.
    Attached Images Attached Images
    thanks for the help
    hope i helped

    feel free to shoot me an e-mail direct i have time to chat.
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