Originally Posted by
canardlover
Howdy all "gassers" out there.! I am currently cleaning and refurbishing a Tillotson HU134A 036 carb on a DLA 32cc engine using the repair kit RK-31-HU just bought from Tillotson on Ireland.
All seems straightforward except one thing that really puzzles me:
In the kit is included a new circular aluminium cup which appears to have its "old friend" situated under the pump membrane. It is evident that the old cup has been punched into place since it has become somewhat "flattened" in the process. See attached pic.
My question to you all: How can I remove the old cup since it is impossible to push it out from behind..?!?!?! Should I remove it at all, or just leave the old cup as is and only change filter, gaskets and membranes..?? Why then is the cup included in the kit..?? Have searched this site for info on this but not found what I seek and therefore I will be very grateful for all input I can get from you. Thanks in advance/canardlover
It is probably "up to you" whether you find it necessary or not, but that cup (plug) serves to close off a fuel channel that could not be manufactured otherwise.
That fuel channel CAN collect dirt, and the only way to properly clean it is to pull the plug, but these plugs are one-time-use only. Hence the new plug.
If you have the tools and skills, I would pull, clean and re-plug. If not, I would not worry too much about it, just keep it in mind as a last resort if the replacement of membranes does not lead to the desired results.
The usually best way to pull these plugs is to very carefully drill a small hole in it (taking GREAT care that the drill does NOT "shoot" through and touch anything behind the plug) and carefully pry it out with a small bent hook in a piece of wire or something like that. Best is to drill slightly off centre.
Pay attention to not scratch the bore in which the plug is sitting, or the new plug could possibly leak.
That is the method Tillotson generally recommends, although I have the impression that most of the info out there is about the larger SkiDoo carbs.
Principle remains the same though.
But as said, most likely there is not much to clean there, I would first blow it out with compressed air and carb cleaner or such. Most cases, that should do it.