The float on this type of carburettor is not adjustable unlike some Tecumseh�s models which have the metal tang to adjust. This model is not adjustable to the best of my knowledge. It just has the plastic insert which is fixed where you place the needle prior to re-installing the float.
Last night I re-checked the carb and float operation and it looked all ok. The float was opening and closing as it should. To the best of my knowledge the seats on all Tecumseh�s are pretty much the same. To date I have not found a seat which is different however I haven�t worked on all Tecumseh�s by any means. I compared the seat originally taken out of the ultima to my spares and it was exactly the same. Well as best as I could distinguish.
I put the unit back together and fired it right up. It coughed a chugged a little at the start however it evened right out and allowed me to get a very smooth low idle and a nice full speed (no over-revving). I re-checked the unit again this morning and no flooding was evident.
At this stage I am going to assume the needle & float got stuck upon re-installation.
I ran the mower for 10-15 minutes and it ran quite well. No chugging, knocks or clunks were heard.
I will reserve my judgement until I give it another couple of test runs over the next few days.
Please let me know if you think there is anything else I should check.
