So I’m an idiot and i was doing a rebuild to the top end of my fl350 Engine and left the crankcase open and it rained and now it’s full of water, I opened the drain but it didn’t drain it
What do i do?

Your drain plug will only drain oil from your balancer gearside. There is no oil in the case as we mix oil with our gas = lubes the cylinder/case.

Pull the Engine out, dump the water out, fill with diesel fuel a few times and dump it out. This should flush any water out of the case.

-Curtis

If the Engine is still in the machine, I’d take the top end off and get the wet/dry shop vac going. Suck out everything. WD40 also displaces water.

thank you for your suggestions i ended up just blowing it with compressed air and got it all out