Question about Stihl BR400 Backpack Leaf Blower

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Have Stihl model Br400 Backpack the problem is the engine will not reach top rpm.

I have changed the Carb. kit and it did not help. Also with the breather opened it will spit out a little drops of fuel.

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The oil to gas ratio is off - you need to either dump the fuel or run all the fuel out of the unit clean the carb and tank - replace the plug and filter mix gas and oil to correct ratio start and let run for 10 to 15 minutes - your carb may need to be adjusted as well.

Posted on Jan 16, 2013

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1 Answer

Run for a second a quits


3 things you need for an engine to run.

Spark, Fuel, Compression.
Check you have all 3 and that they are GOOD. I suspect its a fueling issue, Either Its not getting to the carb or not getting to the cylinder.

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How do I replace the Stihl BR400 backpack leaf blower fuel pickup body and fuel line?


remove the fuel tank is the easiest way... but to change the fuel lines to the carb you have to remove it as well

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1 Answer

Spark gap


0.5mm gap on a spark plug
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Jul 02, 2013 | Stihl BR400 Backpack Leaf Blower

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Oil leaking from an older homelite weedeater


Oil leaking.? The only oil that would be in the machine would be the 2 stroke mixed in the fuel.. I dont understand where 'oil' would be leaking from. (more info please)

Also your question refers to an 'older homelite weedeater' yet its titled 'Problem with Stihl BR400 Backpack Leaf Blower' Which one is it.?

Mar 14, 2013 | Stihl BR400 Backpack Leaf Blower

1 Answer

Stihl br 400 problem- spewing oil out the back of motor


I would say it is not an issue with the piston and rings, any oil leaking from the muffler has to be unburnt oil from the fuel/oil mix, if not already you should run it at a 50-1 mix, also make sure the engine is not running too rich on the fuel screws, check the condition of the air filter as a blocked filter will richen the mixture.

Jan 11, 2013 | Stihl BR400 Backpack Leaf Blower

1 Answer

Stihl BR 400 causes for no spark


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