Hi Grumpy and all
After looking into cost of parts I decided that the cost was just too high to fix up engine. I have instead brought a rebuilt Briggs & Stratton Quantum 35 engine (engine was cheaper than parts would have cost) and fitted that to the mower along with new blades.
The mower now runs like new, these briggs engines are great. Very powerful but they run smooth as.
I may end up keeping this one for myself.
