STIHL BLOWER REPAIR / BR420 MAGNUM / DIAGNOSIS / TEARDOWN AND COMPLETE ENGINE RESEAL / IN 1080HD



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BR420 REBUILD KIT
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AIR FILTER
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CRANK SHAFT SEALS
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STARTER ASSY
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CARB GASKETS
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CARBURETOR COMPLETE
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THE BR420 IS IN IMO THE BEST GAS BLOWER ON PLANET EARTH HOWEVER THEY WILL REQUIRE MINOR SERVICE FROM TIME TO TIME….WATCH AS THE MM1 TEARS THIS ONE DOWN TO THE LAST SCREW AND REASEALS HER AND GETS HER RUNNING FOR ONE MORE SEASON

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25 thoughts on “STIHL BLOWER REPAIR / BR420 MAGNUM / DIAGNOSIS / TEARDOWN AND COMPLETE ENGINE RESEAL / IN 1080HD

  1. My Stihl BR 430 blower has developed a engine knock. Very noticeable at low RPMs. Is the problem most likely a crank shaft bearing/seal?

  2. hi please can you help me i am struggling with my sthil br380 blower and would really appreciate your help it starts and turns off i am mechanically minded so if we could wats app or messenger or Skype and if you have time you could show me wat to do thanks.

  3. Excellent video. I now know where my leaking is coming from on my 30 year old 420. It was made so well, but mine has been beat to heck but still runs great. Don't know if I want to go to the trouble of a complete tear down since the rest of the machine is pretty worn out but at least I know what to expect if I do.

  4. I just bought one of these used at a pawn shop. Thanks for letting us know what you think about this tool, and how to tear it down. Fine camera work and great narrative. Keep it up. now I want to see a video on the carb.

  5. I baught the BR600 magnum about 3 years back. Any problems you know of I should lookout for? I have about 100 hours on it so far, so it hasn't really been used too much but it's been a fantastic machine. I run nothing but 50:1 with 89 octane.

  6. excellent video I feel the same way about my 420 Magnum one of the best blowers ever made and I'm getting ready to have to rebuild mine too.

  7. Hi ,I got a br420 magnum I rebuilt the engine because don't star Just compression explosion like out of time,I cleaned it up and put everything together fuel tankI clean the tank ,carb new spark plug and he doing the same thing I am mad because I Cleaned up so perfect And still do the same thing I put another carb but the same thing again I know he got compression but I don't know what the Hells going on even The coil is clean but nothing just explode muffler and the cap.

  8. I have a Sthil BR400 backpack blower, I removed the pull starter, what size nut holds the starter assembly on the piston point?

  9. Jeremy I want to ask you a question. I purchased my in law's cottage and it came with a BR420 Magnum blower. The blower only has about 4 hours on it. The unit has sat in a dry exterior storage shed but the weather has been extreme for temperatures as it is in northern Ontario Canada (in the 90's in the summer and down to around -15 in winter). It was sitting in the shed for two years untouched. I took it out of the shed and the fuel tank was over half full. I went to pull it over and it just stopped/stuck. I figured it had seized. I pulled the plug and it was full to the brim of fuel so it had hydraliced. I found I broke the shear key on the crank. My question to you is would you think I bent the rod possibly as well? I really do not want to pull the bottom end apart. I did loosen the head bolts and drained out the fuel from the crank case as well. I have fiddled with engines for years but this is the first time I have had a motor draw fuel from temperature changes. You see that before too? Really interested to hear your thoughts on the rod. Thanks

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