What did they do when they serviced the trimmer. I would be saying if it has been sitting for 10 years you will need to replace the carby diaphrams as they would be stiff and not giving the correct fuel mix.
Anyway let us know what they did and I can give you abetter answer on how to fix the unit.
Regards,
Bruce
Please do not PM me asking for support. Post on the forums as it helps all members not just the individual.
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