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64 Merc 350


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10-10-00, 05:55 PM   #1  
motor runs good,after about 2 minutes at half or better throttle it starts to ping.if I throttle back to under half the pinging stops. I use texaco prem and lubrimatic oil at 50:1. boat is 14ft alum,load is about 700# Thanks, J W

 
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10-11-00, 07:10 PM   #2  
Wow, a 1964 35 hp merc ob.
Well it could be a ping.
lets put a timing light on it and
see where your base timing is.
give me the # and ill ck the book.

 
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