Thread: Yanmar6lya-stp
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Old 10-29-2016, 10:16 AM   #4
bayview
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City: gulf coast
Join Date: Jun 2014
Posts: 3,440
vibration at idle too?Rev up to rated rpm at idle? If vibration only at load then bent prop is suspect despite your dive. vibration at idle a bad cylinder is suspect.

If no vibration my first suspect would be fuel filters and pumps
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