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Stihl BR500 Bang then smoke from blower PLEASE HELP

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2023/11/08 08:02:15 (permalink)
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Stihl BR500 Bang then smoke from blower PLEASE HELP

hi guys a recently changed the crankshaft on my BR500 as the bearings where noisy and machine didn't sound great so I took it apart it works out for about an hour then it started to lose power then heard a band and smoke came out of the blower tube anyone got any ideas on the problem at all...

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    SRTsFZ6
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/08 14:33:46 (permalink)
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    Is the engine now locked up?
     
    Compression?
     
    Your going to have to do some digging, back track what you did..
     
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    Scott
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/08 14:40:20 (permalink)
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    no its locked up it still pulls ok just wondered why it died and the smoke came out could it be the carb 
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/08 14:41:02 (permalink)
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    changed the crankshaft with a genuine brand new one but the piston was after market but shawls can't be that 
     
    SRTsFZ6
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/09 07:51:31 (permalink)
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    Carb wouldn't do what your engine did. 
     
    What's the compression, does it have spark?
     
    Everything look ok under the valve cover?
     
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    Scott
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/09 08:39:08 (permalink)
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    don't have a compression tester ill check other things in a while 
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/09 13:54:26 (permalink)
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    think I found the problem this had come of the carb can't see anything else has compression spark and valves all good just adjusted again 
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/09 13:54:51 (permalink)
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    impulse hose came of carb
     
    SRTsFZ6
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/09 14:11:41 (permalink)
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    Impulse line would do it...  Glad you found it..
     
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    Scott
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/09 14:29:36 (permalink)
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    Thanks for your help pal its must appreciated 👍👍
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/09 14:34:00 (permalink)
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    what size jubilee clip  would fit do you think 
     
    SRTsFZ6
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/09 14:51:35 (permalink)
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    Here's a pic of a BR600 I re-assembled after a valve let loose.  There isn't any clamp, (as I re-call and see), just friction.
     
    If the boot fits snugly, it should be ok as it's squashed between the block and carb.  A small zip tie  would work too if needed as there's just literally slight pulses..
     
     
     
     

    Scott
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/09 14:58:44 (permalink)
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    that's great no I had a zip tie on it as It kept slipping of the carb I have ordered one from my local Stihl dealer only £6.00 I have a BR600 also so I can just use that and its better... hahahaha that's great pal once again thanks for your help glad I found this forum 
    SRTsFZ6
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    Re: Stihl BR500 Bang then smoke from blower PLEASE HELP 2023/11/10 07:46:50 (permalink)
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    Your welcome!!
     
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    Scott
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