that makes perfect sense. But, there seems to be two possible o-rings for for our engines. So, for some UNKNOWN reason, my brain tells me to buy the correct one before starting the project. But, when you say it like that…”it’s only a 50¢ part”…I now realize…it’s only a 50¢ partFor a 50 cent o ring, its a no brainer. The existing o ring is probably 25 -30 years old. Possibly a pre viton material



