by Mutt » Mon Feb 14, 2022 3:28 pm
I have done this, even spent some time to build a rester. Dont let it fool ya. I was pulling my hair out one day when I rebuilt a motor and it would not fire. I did a pressure test and the new left seal leaked pretty good. I tore the whole new motor down, installed another new seal. Still leaked, but not as bad. Shaft was in excellent condition, no pitting or grooving. So then I dedided to try and start it anyway. It fired right up and runs like a champ and it still blows bubbles.
I got to thimking about the shaft and seal. The seal that is very commonly used and has been for the last 30 years is an INCH seal.Foor an 11/16" (.688") shaft, but the shaft diameter is 17mm (smaller. 669") SO I looked near and far and finally found some metric seals with the same o.d. and thickness, but for a 17mm shaft !!! They work perfectly.
Test this: get a new common 6816 sprocket seal and a new shaft (or even a good used shaft). Slide teh seal on. It has little to no resistance. Then get the correct seal for the gen/mag shaft and slide it over the sprocket shaft You have to force it on, because it's gonna seal. So happy I found some 17mm seals !!!!