Stihl BG 86 blower problems
Discussion
Hoping someone can help, I am fairly useless with the spanners but....I bought a used BG 86 blower last month. I then purchased the vacuum kit for it and noticed on the first go (literally 2 minutes) that it was running pretty hot, well very hot compared to my other Stihl machines.
Fast forward a week and the same thing, although this time it conked out after 3-4 minutes use with a small amount of smoke/steam. I then put a tank of fresh fuel in (with Stihl oil), changed the air/fuel filters and the same thing is happening. It gradually dies after a few minutes use. It does start on the first pull and sounds very healthy until it dies.
Is the next step going to be resetting the carb to standard settings? From what little I know, I thought overheating issues were usually to do with it running too lean? I would go back to the seller but it's second hand and they live some distance away (and haven't responded to my text which could be a bad omen!). I am hoping to fix it myself rather then spend a load at the local mower shop!
Any help would be great.
Fast forward a week and the same thing, although this time it conked out after 3-4 minutes use with a small amount of smoke/steam. I then put a tank of fresh fuel in (with Stihl oil), changed the air/fuel filters and the same thing is happening. It gradually dies after a few minutes use. It does start on the first pull and sounds very healthy until it dies.
Is the next step going to be resetting the carb to standard settings? From what little I know, I thought overheating issues were usually to do with it running too lean? I would go back to the seller but it's second hand and they live some distance away (and haven't responded to my text which could be a bad omen!). I am hoping to fix it myself rather then spend a load at the local mower shop!
Any help would be great.
Thanks, the vacuum kit is definitely fitted correctly - I will remove it inc. the shredder blade though to check. Think the next step will be to change the plug and clean the spark arrester screen to see if that helps. Is really frustrating but I don't think anything is too seriously wrong as surely it wouldn't start/run at all?!
Great thanks - fuel is definitely good.
I'll check the cooling fins this weekend - failing that will replace the fuel pipe as well. I will remove the shredder to test though but can't believe/hope it isn't that as it's designed for this model and the only reason I bought the damn thing anyway! Fingers crossed
I'll check the cooling fins this weekend - failing that will replace the fuel pipe as well. I will remove the shredder to test though but can't believe/hope it isn't that as it's designed for this model and the only reason I bought the damn thing anyway! Fingers crossed
Thanks - I took it apart last night, sadly not had the time today to test it properly. I did have it running for a few minutes inc. full power last night and it ran well/wasn't anywhere near as hot. Not a proper test though.
I found the exhaust was fairly loose, quite possibly explaining the heat I could feel on the casing? The plug was also slightly loose. I did have a look at the cylinder/piston - difficult to tell but I think there were signs of very very minor scoring, not sure enough to cause much issue though but I might be wrong. I'll give it a good test tomorrow and keep my fingers crossed. Hoping the exhaust was the issue!
I found the exhaust was fairly loose, quite possibly explaining the heat I could feel on the casing? The plug was also slightly loose. I did have a look at the cylinder/piston - difficult to tell but I think there were signs of very very minor scoring, not sure enough to cause much issue though but I might be wrong. I'll give it a good test tomorrow and keep my fingers crossed. Hoping the exhaust was the issue!
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