Question about Black & Decker String Trimmer Cordless 12" 18V
There is power in the machine but the housing/spool is not rotating at all.
Hi there, I just thought I'd mention that I also have a Black & Decker GL720 with the same problem. I'm pretty sure it is less than 1 year old too, so well within the 2 year manufacturer's guarantee here in the UK. I think it may be a UK specific model and the phone number from MrFixIt looks like a US number.
I have tried taking the plastic casing apart, but with no luck, as the two halves won't come apart easily, even after removing all the screws. Ah! OK, I've found out the reason that it wouldn't come apart now, there is a screw hidden under the 123 sticker.
It's all apart now, and I see what is wrong, there is a belt running between a small cog and a large cog, and in my case the large cog has partially melted and the belt has come off. Unfortunately, I'm not sure I can get the replacement part now. Hopefully with yours, MrFixit, the belt might have just slipped off, fingers crossed.
Anyway, here is a service diagram of it in case it will help anybody, but as you will see it says only certain parts can be ordered. If anyone locates a supplier of all the parts please post it here.
Posted on Jun 03, 2009
Belt came off so and I couldn't see the part that seem to be missing that kept the belt on. A nut, bolt and a wash sorted it for me. Fitted to the small drive cog. Simples. When dismantling - remember there is a screw under the sticker!
Posted on Jun 19, 2010
Toss it!!!! rubbish
Posted on Jul 14, 2013
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Posted on Jan 02, 2017
Tips for a great answer:
ensure the spool is not ended if so replace with new spool of string. also check the retaining screw in the middle is not too tight. undo it one click at a time to alow the spool to unwind when the motor runs
always disconnect your strimmer from the power when doing this also wear protective footware and long trousers, when using such tools.
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