You must have not made tool with the bolt correctly or used them right as I was able to remove tubes that even have been glued in with silicone with them. If the bolt idea don't work there is no way the transom idea will. There is no way you can put that much force with the transom tool.
Spark plug tubes are easy to do just pull the coil, don't forget
remove the sparkplug, as well to pull the tubes out,
washer must be small enough to fit thru the tube so it can catch the edge when it is placed past the end...
Washer must be small enough to fit thru the smaller end of the tube.
bolt must be longer than the tube, but short enough you can put a prybar or pliers on the end...
I just use a simple bolt a couple of washers, and a couple of nuts.
Just make sure bolt is long enough and washer is small enough to fit in hole..
Drop the bolt in until you can feel the washer go past the last part of the lip on the tube...
Use a screwdriver and pry the tube out by placing tip under the washer as shown, notice the bolt is at a slight angle so the washer will catch the inside edge.
This tool allows for more force to be used to remove the tube and less breakage than using the transom plug idea.
