1998 Subaru Outback

Engine Mechanical problem
1998 Subaru Outback 4 cyl All Wheel Drive Automatic 104222 miles

I have replaced the harmonic balancer pulley on a 1998 Legacy outback. I have done this before with no problems. Now the car wont start. Vehicle ran before replacement and now just turns over with gas smell and vapor coming out of the air breather. Can any one help with advice. Thank you
Mack EJ25
July 23, 2008.

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