Whizbang
Well-Known OPE Member
I need some feedback.
I picked up a used BR320 Stihl blower that was deemed not running because the pull start, while had tension from the spring, wouldn't turn the engine. I am pretty good with small engines so I started to take it apart and quickly found the nut on the starter sprocket was thread-less. Figure this happened because once I put on a new nut it was VERY hard to pull, could hear a grinding noise, though the cylinder and piston look good from the carb and exhaust ports. I found I was creating aluminum shavings due to the ignition coil being too close flywheel. I made the slight adjustment so that there was no interference, confirmed I still had spark then re assembled and tried to start. I get nothing, it will not fire. I am using freshly mixed gas.
The pull is good now, no more grinding noise. But there is a significant tone change when I pull to start with choke versus no choke, is this normal for something without a primer?
I checked the cylinder compression and I only hit about 90 psi and depending if the choke is on I can hear a slight hiss like there is air leaking from the exhaust. While I know 90 psi is a bit low for compression for this particular machine based on things I have read, but I would expect to at least get the occasional firing. I have never had a small engine not at least fire with fuel, spark and at least 60 psi. I tried a new spark plug with a more significant spark and still nothing.
Any ideas what is going on? Because I am baffled.
I picked up a used BR320 Stihl blower that was deemed not running because the pull start, while had tension from the spring, wouldn't turn the engine. I am pretty good with small engines so I started to take it apart and quickly found the nut on the starter sprocket was thread-less. Figure this happened because once I put on a new nut it was VERY hard to pull, could hear a grinding noise, though the cylinder and piston look good from the carb and exhaust ports. I found I was creating aluminum shavings due to the ignition coil being too close flywheel. I made the slight adjustment so that there was no interference, confirmed I still had spark then re assembled and tried to start. I get nothing, it will not fire. I am using freshly mixed gas.
The pull is good now, no more grinding noise. But there is a significant tone change when I pull to start with choke versus no choke, is this normal for something without a primer?
I checked the cylinder compression and I only hit about 90 psi and depending if the choke is on I can hear a slight hiss like there is air leaking from the exhaust. While I know 90 psi is a bit low for compression for this particular machine based on things I have read, but I would expect to at least get the occasional firing. I have never had a small engine not at least fire with fuel, spark and at least 60 psi. I tried a new spark plug with a more significant spark and still nothing.
Any ideas what is going on? Because I am baffled.
