Thx Big Ted - I'll have another look at the poppett - at first inspection it seemed symetrical in all regards so I thought its position in the carby body as irrelevent despite the numerous letters moulded into it. If indeed the seat is stepped then incorect positioning would certainly make a difference. .... You may have hit the nail on the head! But i still would have thought that shifting the position of the idle adjusting screw would have had some impact on the engine speed?
One last thought after reading the posts is the positioning of the boss of the diaphragm boss - With it facing upwards towards the big spring it will certainly cause a higher loading on the diaphragm that in turn will force the popett to a greater opening and incraese engine speed so I have something else to think about! ..... Conversel,I did read the attachment you kindly sent and I notice that the instrcution was to install the diaphragm with the boss facing downwards - ie. Against the smaller spring but this would unload the diaphragm and reduce poppett opening and re4sulting in an lower engine speed so buggered if i know??????
- Think I'll despatch the mongrul plastic carby heap of sh#it to the shizenhouse and try and find an OLD amal and fit it on!
- BUMPS
