HI could anyone ID this engine it has 1 exhaust port and 5 transfer ports the head button is also part of the head I'm looking for a new head as this one has some missing fins thanks Jasen

and

It looks like an old SX .15 engine.

redsand its a .21 size engine and came in a second hand BMT 891

It's a P5.
It was made by Picco around 1991
There were many versions but this looks to be an early model.

I think finding a new head will be difficult though.

Julius thanks for the info it still runs grate i may be ale to find something else that fits if not ill just run it just don't want to cook it