I had a lot of trouble "seeing" the 1 drop per second when the throttle was full open. It worked well for me at the idle position. Maybe it's just me, and I know what the instructions read, but that was my experience. Maybe this would be easier with 2 people. one underneath on the crank and a second on the primer pump watching for the transition to drip.

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'82 300SD - 361K mi - "Blue"

"Good judgement comes from experience. Experience comes from bad judgement."

listen, look, .........and duck.