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Old 12-21-2013, 11:49 AM
Fubba Fubba is offline
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Location: Middle GA
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BR 600 will not run at WOT

I'm having lots of trouble with one of my blowers. It's an older one. Serial #270772994. The problem I'm having is it will not run at WOT. It initially goes up to WOT when the trigger is pulled, but it will immediately bog down to the point of shutting off or the RPM's will drop and not be steady. It idles just fine. When it is at WOT, there is sometimes a puff of black smoke, and I can smell gas. It may be a little rich, but when I adjust the carb a little leaner, it gets too lean an wants to turn off.

Here's what I have done:
Adjusted valves at TDC and replaced gasket
Replaced coil at .008" gap
Replaced fuel lines from tank to carb and primer bulb
Checked fuel and air filter
Replaced spark plug.
Removed spark arrestor
Removed muffler to check to blockage
Checked fuel tank vent

I am at a loss. What in the world is causing this? I can't think of anything else to check.
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Old 12-21-2013, 12:24 PM
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Vecchio Lawn Care Vecchio Lawn Care is offline
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BR 600 will not run at WOT

Take the carb apart. Possibly could be a needle valve or a float sticking
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Old 12-21-2013, 12:58 PM
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BigFish BigFish is offline
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As was mentioned, rebuild or replace the carb. Are you sure you hooked the fuel lines up correctly?
Prolly better to just replace the carb.
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Old 12-21-2013, 12:59 PM
Fubba Fubba is offline
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Forgot to mention, I replaced the carb too. My dealer didn't give me a matching numbers carb. The problem is still the same though. Still a carb issue?
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Old 12-21-2013, 03:32 PM
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Vecchio Lawn Care Vecchio Lawn Care is offline
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BR 600 will not run at WOT

It sounds like one but if it's a brand new one than either it's the wrong one or fuel lines are wrong
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Old 12-21-2013, 10:25 PM
mcambrose mcambrose is offline
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Location: Florence, AL
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I once had a stihl blower and it id did similar thing. The fuel line was cracked. when I revved it up, the line vibrated enough to pull air and it would die.
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  #7  
Old 12-21-2013, 11:13 PM
MRCo. MRCo. is online now
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Location: Franklin, NC
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You adjusted the valves...so next I say you pull the valves and clean them. One reason I dislike 4 mixes is that mix oil isn't formulated to do what it's doing in them. I've found valves get sticky mix oil residue on them, affecting running.
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  #8  
Old 12-23-2013, 09:51 PM
ChuckPMi ChuckPMi is online now
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Location: Adrian, MI
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Try replacing the vibration isolation rubbers for the fuel tank. Maybe the old ones have gotten hard, resulting in the fuel foaming at WOT.
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  #9  
Old 12-24-2013, 02:06 AM
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sildoc sildoc is offline
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Location: Eagle Point, Oregon
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recheck your fuel lines to make sure you didn't pinch them putting it back together either putting a hole in it or pinching off the fuel. Had this problem before. Also make sure you have enough fuel line in the tank. Replace the fuel filter as it may look somewhat clean but can be clogged, make sure you get the weighted fuel filter.
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Old 01-04-2014, 04:05 PM
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milo milo is online now
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Location: Allentown PA
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you figure it out yet???? what fixed it???
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