QuestionHi Howard,
I checked the ignition tioming, it was good.
The carbs are running lean,as you suspected, and are out of balance.
I have located a Unysin tool for balancing.
The CDSE carbs are emmission carbs, 1970 GT6+,
for the overseas market.
They have the brass plug in the bottom of the carb, instaed of the adjuster.
would the mixture be adjusted through the dash pot with the special allen key tool, and if so which direction enriches and wich to lean?
Thanks.
Joe
AnswerHi Joe,
Some CDSEs were adjustable by a 3mm Allen down from the top and some were fixed with no adjustment. Just insert a long 3mm Allen wrench down from above by removing the oil dampening rod and turn clockwise to richen and counter clockwise to lean. First use the Unisin to balance the butterflies then with the engine at operating temp. Set the idle to specs and lift the front piston with the small side mounted spring loaded pin. Some Stromberg carbs didn't have that pin so put a small flat blade screwdriver in the intake and rotate the screwdriver so as to raise the piston. The reason you are going to use a small flat blade screwdriver is so you can accurately do the rear carb the same amount. When you raise the piston the engine should slow down and start sounding like it is running on two cylinders. If the engine speeds up and stays fast, you are too rich, If the engine dies, you are either too lean or you didn't balance the throttle plates well enough. CONTRARY TO WHAT THE BOOKS SAY. YOU ARE CHECKING THE REAR CARB WHEN YOU LIFT THE FRONT PISTON. When you have it correct, the engine RPM will drop off and it will run like an old John Deer tractor. When you lift the rear piston you are checking the front carb.
Rev the engine between each ck so as to clear the combustion chamber of raw fuel.
Howard
