[Healeys] hd8 carb bench settings / first start up

Bob Spidell bspidell at comcast.net
Wed May 13 15:26:51 MDT 2009


re: 
"The carbs were proffessionally rebuilt and have 2 
turns on what I believe is the idle screw (big one on its own?) and the 
throttle screws backed fully off, I assume the jet was set up correctly. 
Do these settings sound correct and would this give me a high / low idle" 


That's enough for (only) a very slow idle. I'd open (counter-clockwise) the slow-run (idle) screws about 3 turns. The slow-run valves are a 'normal' screw: clockwise to close, counter-clockwise to open. 

Remove the dashpots from the caburettors and turn the key to 'run.' When the pump stops clicking--if it doesn't you have a fuel or air leak--check the levels of the jets and the fuel inside the jets. If you have roughly 1/10-inch (2-3mm) from the top of the jet bridge down to the tops of the jets, and a similar gap from the tops of the jets to the fuel level--on both carbs--you should be in the ballpark for mixture. If not, adjust the float levels and the jet level/mixture screws (small screws on the left-hand side of the carbs--clockwise to enrichen). With the dashpots off make sure the jet needles are properly located in the piston (varies depending on type/brand of needle; either base of shank or top of groove). 


re: 
"I had to remove the oil flexi pipe to bleed thru and now have around 58psi oil 
pressure now on the gauge" 

How? Just cranking the engine? That sounds way too high; if you remove the plugs and crank the starter you should get at most a few psi. 





Bob 


... 

I dont have a workshop manual with me (left it at work) so would like to start 
her up for the first time in the morning (minus one exhaust, gone back to 
manufacturers for mods). The carbs were proffessionally rebuilt and have 2 
turns on what I believe is the idle screw (big one on its own?) and the 
throttle screws backed fully off, I assume the jet was set up correctly. 



Do these settings sound correct and would this give me a high / low idle? On 
startup if it is too high does the idle screw need to be wound in or out? 



Sorry if this sounds basic but I been brought up on fuel injection (gte's) and 
know less than nothing about SU's, and there doesnt seem much on the web for 
intial startups after rebuilds (so thought I would ask the all wise). 



ps 

I had to remove the oil flexi pipe to bleed thru and now have around 58psi oil 
pressure now on the gauge, is there anything else to worry about (ie are air 
locks common in the coolant?) 



many thanks Andy 


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