Hi Grumpy.Thanks for that .I will use a steel tool . I'm only a backyarder .The poly tool I made today was made out of a skateboard wheel which is a bit too soft for this job. Makes total sense what you have said. The model I am working on is /GV 150-3157301 purs like a kitten - roars like a lion when you want it to untill oil seaps into the points. The oil seal in the motor which is what the mower shop sold me is a 41-25-6 unlike the one in the picture which is a 41-21-6 so I hope I have ordered the right one this time .The seal I used last time seemed to go in quite easy and the mower shop told me to push in as far as it would go but didn't look right. It sat in about 5+ mm and the diagram shows 2mm.I've fixed a lot of different engines and have always replaced with new seals top and bottom and never had a problem like this one. As for uploading photos I will when I learn how to.I barely know how to get to this page.I'm hopeing to get one of the kids to show me how to use the forum properly one day.please have patients I will learn .once again thankyou very much and I hope I havnt confused you any with what I have written because I think its confused me.