Timing mark at 9 o'clock...no pointer. OK??
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Joined: Oct 2009
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Timing mark at 9 o'clock...no pointer. OK??
So I set up my MC2150 carb step-by-step using FMC400's instructions. The choke, choke pulloff, high speed idle cam, set the "V" mark using the hex screw on the plastic linkage...all worked great.
But the truck just didn't run right...sounded terrible.
I put the tach on, tried adjusting the curb idle speed screw, tried adjusting the 2 mixture screws...horrible...bad idling, loped about.
So, broke out my in-laws old skool timing light; timing pointer missing on the harmonic balancer...hmm. Stuck the light on it anyway and found the white stripe at about 11 o'clock. So I loosened the distrib nut, turned counter clockwise till it "sounded" right. Tightened up the distrib nut and checked the tach. Sure enough, the tach is showing 650 rpm at curb idle, the fuel mix screws are exactly 4 turns out from lightly seated, and the curb idle screw is just 1/2 turn tighter than seated against the throttle.
Truck runs great.
I put the timing light back on it and it's steady at about 8:30 to 9 o'clock.
Since I don't have pointer or any timing adjustment marks I can see, where roughly is my timing set?
But the truck just didn't run right...sounded terrible.
I put the tach on, tried adjusting the curb idle speed screw, tried adjusting the 2 mixture screws...horrible...bad idling, loped about.
So, broke out my in-laws old skool timing light; timing pointer missing on the harmonic balancer...hmm. Stuck the light on it anyway and found the white stripe at about 11 o'clock. So I loosened the distrib nut, turned counter clockwise till it "sounded" right. Tightened up the distrib nut and checked the tach. Sure enough, the tach is showing 650 rpm at curb idle, the fuel mix screws are exactly 4 turns out from lightly seated, and the curb idle screw is just 1/2 turn tighter than seated against the throttle.
Truck runs great.
I put the timing light back on it and it's steady at about 8:30 to 9 o'clock.
Since I don't have pointer or any timing adjustment marks I can see, where roughly is my timing set?
Senior User
Joined: Feb 2009
Posts: 308
Likes: 0
From: Southern NM
Another very useful tool to have in your collection is a vacuum gauge.It will help you set that carb easily,and it is also a must have aid in diagnosing engine mechanical and vacuum related problems.
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