I'm not a fan of submerging a saw in water. Put 10 PSI of air pressure to it and spray all possible areas with something like windex.
Are not you afraid to use 10psi for crank case pressure test? Wouldn't you be concerned about oil seal integrity at that pressure level?
My concern is that 10 psi could damage oil seals. I've always been told to test no more of 5-6 psi, just for this reason.
If you have other useful and different experiences , I would be happy to hear them about.
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