well mate, what sort of Gas system is it?
is it a Vapour ring
63mm-LPG-CNG-gas-Mixer-for-autogas-conversion-tradtional-system-in-gasoline-EFI-or-carburetor-Ca.jpg
Sprint type
Sprint Gas.jpg
or the old Plate type that fits under the carby?????
your mixer
is it an Impco type,
Impco.JPG
OMVL
OMVL.JPG
or a Vialle
Vialle.JPG
none of those pic's will be what you have, just using them to illustrate the variety of types available
my first piece of advice would be
get yourself a crimping machine, a whole load of new plugs and go around the WHOLE lot, and replace all of the crimped joiners and plugs - over time they stretch and get dirt and such into the joins and dont work 100%
2nd pice of advice
get it in for a Gas service
(I used to empty my petrol tank, and take it in for a service - if they charge you for petrol or ring and tell you you have no petrol, that means they know diddly squat about the Gas and will not do it properly)
tell them thanks, but you suck, so I will take it elsewhere
if you take it to get the Gas tuned - as you will use that more often - AND they do it properly - you are on a winner
if they know what they are doing
- you will get the correct type of plugs
- you should get the correct leads you need
- they should tune it to how you want it
- economy - can get 600Kms out of an 80L tank, but you will never get over 60km/p/h driving
- power - get maybe 250 - 350 out of a 80L tank, but with speed you will also get close to 140km/p/h - if it was legal................
then let us know how you get on..............