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Originally Posted by JimNNN
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BTW, what are the long term negative consequences of running an engine at 3 degrees retarded timing? My engine timing is stuck at TDC where the specs say it should be 3 degrees BTDC.
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Assuming the distributor was serviced before being bolted down and the points & timing may have been set correctly at that time... has the Dwell spec of the points been checked recently?
If the points are now worn past that initial adjustment it will cause the timing to be out of spec also.
There is a fair possibility that re-setting the dwell of the points correctly will get the timing closer to where it should be.
Also check that 5 inches of vacuum applied to the canister on the distributor will actually twist the internals of the distributor. If the points mounting plate is stuck the timing cannot advance at all.
https://www.ctci.org/gilsgarage/crac...aust-manifold/
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