Petrol Lawnmower (CT5)

Viking 2 petrol lawnmower. Is working but unreliable to start. I took it for service and was told carburetor needed replacing (this along with the full service would have been uneconomical to do, so tried making do for a while but drove me nuts getting it started in end so have replaced with battery mower). My brother said it was unlikely that carburetor needed fully replacing poss just diaphragm. Doesn't mean much to me but might to someone else who has a bit of engine knowledge. Bodywork is pretty sound with little rust and has had oil change. Any good to anyone? Not sure how old it is..... prob 5-10years. Could poss find manual if someone takes it.

Collect from Chestfield