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Carb Adjustments

knuckle47

knuckle47

Advanced Contributor
"OK, So FINALLY, my engines ar

"OK, So FINALLY, my engines are running so great I am tickled pink just by turning the key and hearing them start so freakin' easily. Absolutely great...

I have adjusted the timing to 10 degrees on the dot. I am using the Edelbrock 1409 look alikes . I THINK they are Carters 9780S. There are two mixture screws on the base that do affect the idle and I have them set to about 3/4 turn each . Any tighter and the engine will stall, any looser and they get rougher. Exactly which reference am I supposed to set them for? Is it a drop and recovery in idle speed, vacuum? Talk about confused

Those old Linkert carbs on v-twins were real easy...1 jet, 1 mixture screw, 2 plugs"
 
"Tell you the truth, Al, marin

"Tell you the truth, Al, marine engines are hard to get the idle set right (because the stubborn things don't move very much on the rigid mounts like a car/ truck engine).

Since the motor doesn't rock back and forth you have to stick a vacuum gage on it. Just be sure you don't use the PCV valve hose--that'll remove a vacuum "leak" and screw up the results.

Jeff"
 
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