Thanks Guys, I appreciate the comments. I always like working on something different what I normally find.
Well I gave the carb a good clean, it was full of stale fuel. I also Re roped the starter as the end was frayed and now the mower really runs well.
MrMcKay - you were spot on about the fixed speed, now mine isnt hunting in the low throttle speed position, it is just the same speed until the engine is moved to the stop position. That is slightly strange as the other Chonda's I have worked on before have always had a decent idle.
Secondly mine doesnt have a blade bar, it has to seperate blades on a small long oval type blade disk.
The only problem I had was trying to adjust the valves as the clearance was really low and for the life of me I couldnt loosen the valve bolts like I normally do with 2 seperate spanners. Any tips would be appreciated. I like to make sure the valves are adjusted spot on before moving it on even though its actually running really nicely.
I was thinking the nuts might have some form of loctite or similar on them although no others I have found have been difficult to loosen and adjust.
Jaffa.