I wonder if you can help me diagnose a problem with my Balmoral, model number F016309942 . I have had this since new, bought 2003. Its generally been fine, only had light use as I have others to use ( had Mountfields, Flymo's and recently got a Hayter) . It starts OK on the pull, but when warm the tickover is like this (YouTube video). When I open the throttle and start cutting it runs better , but it used to be slow, steady beat that would just keep going. but the slow running has got worse over the last couple of years. Now, unless I open the throttle a bit, it will die. I have taken the carb off, dismantled it and given it a clean , but to no effect. I dont' believe I have anything blocking the main running jet but I wondered if there was another place where crap could build. I am not sure what make of engine I have, and therefore what make of carb , but its stamped as per the picture below. It says 5148, which leads me to believe its a Tecumseh , but I dont' know how to identify the make of engine - perhaps one of you will know, by the age of the mower.
I am looking for some assistance identifying the carb and/or diagnosing the problem.
Huge thanks in advance
Added some extra pics at the request of wristpin - hopefully now the vid above is public and viewable.