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Got a Brumby engine cheap less Carby however I am concerned that there maybe moisture in the engine. I drained it and seemed ok but one plug appeared to have what appeared to be moisture on it. I removed plugs and sprayed CRC 5.56 water dispersant in down where plugs fit. Took off tappet covers and sprayed them out tappets well. Is there anything else that I can do do ease my concern. Ive rotated engine manually whilst spraying down on the piston through plug hole. I've considered filling the engine "WAY UP" with diesel fuel and spraying down cylinders and allowing to stand for a coiple of days then draining it. Any idears out there.

Engines will always fill up with water/moisture if they are left sitting. I once recommissioned a EA81 that had been sitting in the weather for 18 months or so... Drained the sump and it had heaps of water (water sits under the oil)!

It started first go and I think the Brumby I put it in is still rattling away on a property somewhere!

CRC spray down the plug holes is is a good idea but I do not think you will have a problem.

But... There are so many variables, how long has it sat for, when are you going to use it (replace all the seals before you do!) and so on.

I'd also look at pouring a bit of fresh oil into each cylinder and gently turn over - even better if you've got the engine on a stand or are able to sit it on its side and tip a bit of oil in the two upright cylinders then turn over a few times to get the oil all around the too of the pistons.
Rotate the whole engine 180 degrees and do the same for the other two cylinders. Then seal up the intake and exhaust ports if you're not going to use it for some time. Also chuck some fresh oil in the sump

If you have a gearbox, flywheel and starter motor you can crank it on that a few times then do a compression check - just remember the results may be inflated (pardon the pun) due to the oil creating a better seal with the rings.

After doin this and running the engine again expect quite a bit of blue smoke for a few minutes after initial startup.

Cheers

Bennie

Thanks fellas for that advise.