Hello and thank you to the moderators for accepting me into the forum,
My two cents for the carb cleaning line of enquiry-
Recently one of my bs34's began to pop and stall etc and i thought that's easy, just start the compressor and clear the pilot circuit. Yeah, right... Still popped and stalled on idle and roll-off.
Ok, off with it again and this time i stripped it of all jets and rubber parts, boiled it 15 minutes and then sprayed paint thinner AND brake cleaner backwards and forwards through the pilot circuit. The pilot hole and three progression holes now spewed out brake cleaner and all looked good.
Ok, high hopes try again. This time it idled ok for a few minutes but then popped and stalled .
Yet again, off with it, ripped out all seals, the throttle shaft etc for the second time then repeated the boiling, spraying and blowing. It still popped and stalled .
So i decided to remove the brass plug that sits just in front of the mixture screw.
Centre punched it, drilled a small hole with a Dremel, drilled progressively bigger holes until the plug could be poked out. The Dremel is high speed so it does not need to be pushed hard. This minimizes risk of pushing the plug in where it could be stuck.
The pilot bore behind the plug is 3-ish mm so i ran a 3,2mm drill bit all the way, cleared the debris and finally replugged with a stump of aluminum tig rod hammered out to size. Sealed with Loctite.
Now the carb runs as it should.
Removing those brass plugs was easier than expected.
My two cents for the carb cleaning line of enquiry-
Recently one of my bs34's began to pop and stall etc and i thought that's easy, just start the compressor and clear the pilot circuit. Yeah, right... Still popped and stalled on idle and roll-off.
Ok, off with it again and this time i stripped it of all jets and rubber parts, boiled it 15 minutes and then sprayed paint thinner AND brake cleaner backwards and forwards through the pilot circuit. The pilot hole and three progression holes now spewed out brake cleaner and all looked good.
Ok, high hopes try again. This time it idled ok for a few minutes but then popped and stalled .
Yet again, off with it, ripped out all seals, the throttle shaft etc for the second time then repeated the boiling, spraying and blowing. It still popped and stalled .
So i decided to remove the brass plug that sits just in front of the mixture screw.
Centre punched it, drilled a small hole with a Dremel, drilled progressively bigger holes until the plug could be poked out. The Dremel is high speed so it does not need to be pushed hard. This minimizes risk of pushing the plug in where it could be stuck.
The pilot bore behind the plug is 3-ish mm so i ran a 3,2mm drill bit all the way, cleared the debris and finally replugged with a stump of aluminum tig rod hammered out to size. Sealed with Loctite.
Now the carb runs as it should.
Removing those brass plugs was easier than expected.