1700B back pressure thru intake

/ 1700B back pressure thru intake #1  
Joined
Apr 12, 2009
Messages
38
Location
Ola, TX
Tractor
Yanmar 1700B
I feel and hear a lot of blow back through the air intake, I am assuming this might be a sign of the timing being off?

Basicly it runs good but shakes alittle to much from this.
 
 
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