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fourbybud
03-20-2009, 06:26 AM
Hey guys, yesterday I was using my old and faithful BR400 backpack blower when I felt a big thud, like I backed into something but didn't, and it lost all power and just spits and sputters. It has spark, 120 lbs of compression, and seems to be getting fuel because it smokes and backfires out the exhuast.
Anyone have any ideas on what might have happend?

Thanks in advance.

cutitright
03-20-2009, 07:21 AM
Hey guys, yesterday I was using my old and faithful BR400 backpack blower when I felt a big thud, like I backed into something but didn't, and it lost all power and just spits and sputters. It has spark, 120 lbs of compression, and seems to be getting fuel because it smokes and backfires out the exhuast.
Anyone have any ideas on what might have happend?

Thanks in advance.
I have a BR-400 and experienced the same problem last year. I found the small screen, in the end of the exhaust pipe on the muffler had become plugged up with carbon. This carbon will not allow the engine to breath and run properly or not run at all. The screen on mine was held on by a spring clip that can be removed with pliers. Once the clip is off, remove the screen and clean it using a small wire brush and solvent. Once it is cleaned and reinstalled, the unit ran like new! This suggestion may or may not be the problem. Just my experience with this blower! Good luck!

twotone
03-20-2009, 08:07 AM
something get lodged in the blower fan?

kaferhaus
03-20-2009, 08:21 AM
Likely the exhaust, or the ignition module (just because you have spark doesn't mean it's good)

I'm betting it's carboned up.

jkilov
03-20-2009, 06:37 PM
something get lodged in the blower fan?
And caused the flywheel/fan key to shear?

fourbybud
03-20-2009, 07:20 PM
Well I took it apart after work only to have both piston rings come out in two pieces!!!!
Looks like it might be time to go shopping. I liked the BR400 on power what do you think I should go for next?
I already own other Stihl and Tanaka equipment so I would like to stay with one of them.
Thanks for all the suggestions.

mowerbrad
03-20-2009, 07:23 PM
If you are looking for something within the same power range, I would suggest the stihl BR420. If you want to get more power go for the BR600.

topsites
03-20-2009, 07:48 PM
Spend the extra and get the 600, don't look back wishing.

weasel
03-20-2009, 07:52 PM
I agree with the BR600 we have them and love'em. Fix the 400 when you can for an extra or stand by

fourbybud
03-20-2009, 07:57 PM
Does the BR600 really have that much power? Is there anything to watch out for on them?

ed2hess
03-20-2009, 09:13 PM
Does the BR600 really have that much power? Is there anything to watch out for on them?

Don't get the 600 you had one of the most reliable blower engines on the 400 go to the 420. It has more power and obviously if the 400 was sufficient then the 420 will be better.We have some of the big Echo units but there isn't really any need for these big blowers in lawn care if you use your mowers correctly.

ExtExc
03-20-2009, 11:08 PM
600 is capable of 29mph more according to the stihl website.

weasel
03-21-2009, 09:46 PM
Does the BR600 really have that much power? Is there anything to watch out for on them?

A lot of power. It moves air really well far better than anything else that goes on your back. You need to look at YOUR accts to see if you need it. i.e leaves, sidewalks, large areas. For us we can walk up the middle of a street and blow both sides in a single pass we can move debris 20 and 30 feet away and blow a lot of leaves in the fall.

TheLawnRangerLLC
03-21-2009, 09:52 PM
I have the BR 600 and it is,imo, the best blower out there. I can blast out beds, and clean up yards very quickly using this blower. Like topsites said, spend the extra money so you don't look back wishing you did. Good luck!

fourbybud
03-22-2009, 06:43 AM
Well i did it:) Bought a new BR600. Gonna try it out today and see what it is made of. cant wait

Richard Martin
03-22-2009, 07:21 AM
How about just putting a couple of new rings in your old BR400 and putting it back to work. If the cylinder walls look good then go for it. Oh yeah, use some better gas and oil. More than likely the rings froze in the grooves.

jkilov
03-22-2009, 10:17 AM
Stihl still offers the BR 420 equipped with a catalytic muffler. Also since the 320/400/420 were in production for so long, engine parts are not hard to find at a reasonable price.

Shuter
03-22-2009, 10:49 AM
I have had the same thing with my 400s. I replaced the carb, $75.00 from the dealer. Works fine after the new carb.

TheLawnRangerLLC
03-22-2009, 08:28 PM
When you start using the 60, make sure that you use synthetic oil for you mix...stihl preferably, did that sound like a stihl dealer quote, sorry, anyhow, the 600 does like the synthetic better though. You will love your new 600 its a beast.:weightlifter:

fool32696
03-22-2009, 09:18 PM
I bought a brand new Kawasaki 750 blower last year and my 7 yr old BR420 is still my go-to machine. It's lighter, more comfortable, more accurate (easier to get tight areas clean), and it's easier to start. The only time I break out the 750 is on commercials with large pavement areas. I've decided that on residentials a BR420 is the ideal machine.

genesis215
03-22-2009, 09:56 PM
The BR 600 is what I would recommend. Gobs more power, and you can never have too much power in a blower. The Tanaka TBL-7800 is a great blower too. Just not the power of the 600. The BR 420 will be significantly less than the Tanaka's power. It is a great blower though. Just pick what you like.

mississippiturf
03-22-2009, 10:48 PM
I purchased the 600 late last year. With less than 3 hours run time,when I would hold down the throttle wide open, it would run for a few seconds then start losing its RPM's to almost nothing.

Since it was still under warranty, I took it back to my dealer who called me later in the day and said that some of the 600's were made with a carb that was not adequate. He replaced the carb and I have had no problems. Its truly a beast!!