Exhaust on a petrol generator

[rlloyd]

You do have to allow some air flow to cool the engine. Even water-cooled engines sometimes overheat if they don't have a bit of air blowing over the oil pan, etc. Don't know what you mean by a cage but even the generator requires cooling or it will have a short life at best.

Thanks for the reply

The generator will sit inside a heavy duty metal cage. with around 3-4" away from the internal walls of the box which will suround it, access to start the generator will be from outside the shed via a side door, which will left open when its running anyway.

The fuel tank will be accessable from the inside & the pull start if needed via a hinged lid, and also to remove the generator if need be.

PS I'll go into more detail when answering the other replies