ive just swapped the engine in my 2,25 s2a. i also changed the carb of old engine which worked well until engine went bang. now when i put the choke on all it does splutter and pop. can anyone point me in right direction
 
i had that problem after i attempted to repair my 2 1/4 petrol, i lengthened the choke cable abit so that when fully pulled out it wasn't fully closed.

i eventually sort the problem properly when i figured out what the mixture control screw did! i screwed it all the way in then back out again untill the engine ran sweet, then i managed to put the choke wire back as it was originally.

unfortunatly that engine has since past away :(
 
Usually / Often ..... the trick with a jet volume screw is to turn it all the way IN, then turn it out exactly TWO full turns.

It seems that the way people design these things means 2 full turns is usually a good starting point. All new engines have to be started from scratch!

So 2 full turns out is usually / often the best start.

CharlesY
 
Usually / Often ..... the trick with a jet volume screw is to turn it all the way IN, then turn it out exactly TWO full turns.

It seems that the way people design these things means 2 full turns is usually a good starting point. All new engines have to be started from scratch!

So 2 full turns out is usually / often the best start.

CharlesY

thats probably all i had to screw mine out to get it sounding right. wasn't much like.
 

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