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View Full Version : Stihl blowers that run bad


R Q
11-18-2010, 09:07 AM
I have a Stihl 60 something cc blower, one of the 4mix types. It has never ran good and has never leaned out and ran like it should. I had it back to the shop early on a few times and then just learned to live with it. It's probably 5 years old now.
Recently it messed up again and rather than just replace it, I put it in the shop. Stihl actually replaced the short block because they had a bunch go bad. I bought a new carb for it and just about everything else has been replaced.
There were 10 other Stihl blowers in for various reasons and the shop says that the Stihl Rep has been coming by regularly trying to see what is going on.
It still runs like crap so I'm not putting any more money into.
What I want to know is have you experienced the same? and what have you done to make them scream like they should?

Wayne 55
11-18-2010, 03:20 PM
Small Engines are a tempromental item. One little thing makes them run like crap. One thing too look into is altitude. If the carb is factory setup it could be too rich for the altitude in your area. Less air means less fuel. It could also be ignition. a bad pickup or coil not getting a hot enough spark. Change the plug to one a little hotter and widen the gap slightly. Even try removing the fan and running the engine. If the RPMs pick up to what you want to hear chances are the fan is loading the engine too much.

Richard Martin
11-19-2010, 10:09 AM
BR600s aren't supposed to scream. The blower impeller puts a load on the engine and keeps the RPM down. It should only turn around 7500 or so RPM.

Disreagrding the RPM or your apparent thought that it's not high enough...

Does the blower actually blow hard enough? You mention that it's not "leaning" out. What does that mean?

R Q
11-19-2010, 05:15 PM
BR600s aren't supposed to scream. The blower impeller puts a load on the engine and keeps the RPM down. It should only turn around 7500 or so RPM.

Disreagrding the RPM or your apparent thought that it's not high enough...

Does the blower actually blow hard enough? You mention that it's not "leaning" out. What does that mean?

It does not blow hard at all and actually stumbles around in the RPMs.
"Leaning out" when you used to tune a 2 cycle you could adjust it till it screamed or "leaned out"

Richard Martin
11-19-2010, 05:30 PM
I know what's wrong with it. Do this to the fuel pickup inside of the tank...

http://i208.photobucket.com/albums/bb56/RMartin631/mower%20stuff/DSCN0306.jpg

http://i208.photobucket.com/albums/bb56/RMartin631/mower%20stuff/DSCN0309.jpg

Don't forget to clean the tank up first.

http://i208.photobucket.com/albums/bb56/RMartin631/mower%20stuff/DSCN0323.jpg