Hidea-ous beast

Put this in a 25 litre tub of water and gave it a run.
As it was operating off the internal fuel tank there was no way to prime the carburettor so it took a few pulls to get it to fire. Then it was ok. Ran it until it was warm then drained it down and put it back in the workshop.
Now I know it will start and run then it will be one less question mark next year.