HI Guys,
Thanks for your interest!! I think i may be pretty close to getting a Walbro carb. I have located a local supplier who can supply the carb of a 35cc gasser meant for RC!! Well the catch is that its as expensive as the engine :-)!! and it'll take a month to get here.

Just one thought though.
Is the hp of the engine, to a large extent, determined by the carby? At the moment, this engine gives 1.5Hp with the carby it uses. Will the Walbro carb improve this?

I think the colling of this engine is done by the fins to a large extent. But the fins look like very big to me. Can i look at reducing the fin size to reduce weight?

Type 2 Stroke, Single Cylinder
Displacement (cc): 35
Bore (mm): 35
Stroke (mm): 36
Fuel: Petrol
Compression Ratio: 6:1
Spark Plug: Mico-W175Z\ Champion PL7YC
Power:
KW (HP): 1.1 (1.5)
Speed (RPM): 7000
Starting: Rope
Dirn. Of Rotation at PTO: Clockwise
Ignition System: Fly Wheel MagnetoCB\TI Optional
Weight (kg.): 4.7

In their stationary engines, the cylinder is made of Cast Iron. I'll find out today what the cylinder for this engine is made of.
I have attached a pic of the engine mounted on a sprayer: