Hi, Thanks for the help, I did a compression test this morning and got number 1 185 psi, 2 60 psi, 3 175 psi and 4 170 psi.
This on an engine which hasn't started since 1990.
I took a chance and poured some fuel in and the engine started.
I reassembled the carbs, restarted and ran for about 3 minutes.
When I turned it off the engine ran on for about 10 seconds, this could be due to the high compression or because there was no water.
I'll re check the compression figures when it has cooled down.
P.S The engine had 60 psi of oil pressure while cranking.