1966 500 merc sn# 1939837 won't start

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Aug 9, 2004
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i have a 1966 500 merc sn# 1939837 won't start..it will run for about 10 sec then die..it will run a little longer if u pump on the bulb a little...what could be wrong?
 

Laddies

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Sep 10, 2004
Messages
12,218
Re: 1966 500 merc sn# 1939837 won't start

sounds like it needs the carbs cleaned
 

JB

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Mar 25, 2001
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45,907
Re: 1966 500 merc sn# 1939837 won't start

Sounds like a failing fuel pump or fuel supply to me.
 

eurolarva

Rear Admiral
Joined
Jun 24, 2003
Messages
4,182
Re: 1966 500 merc sn# 1939837 won't start

Are you able to get the primer bulb to stay hard? Is gas can venting okay? With a motor that old you may want to test the compression. If you have low compression you are not going to get much fuel.
 

Clams Canino

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Jan 10, 2004
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2,179
Re: 1966 500 merc sn# 1939837 won't start

I'm with JB and Laddie. Fuel delivery issue somewhere.<br /><br />-W
 
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