1999 Mercury 115HP motor very tough starting, if at all

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DMACK154

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When 1st running it will run well, from idle to WOT. After it heats up Motor wont run and can only start it when throttle is moved about 3/4 of the way but smokes very bad. It almost sounds like the timing might have jumped. New plugs, clean fuel filter. Compression is ok not the best. The acceleration pump was just replaced (not the fuel pump). The coils are about 5 years old.
 

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