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Old 02-23-2017, 01:12 PM   #2
bayview
Guru
 
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
The 6b has models from low 200 HP to above 400 HP so ask your self if the 400 HP is harmed by running at 200. Early engines especially 2 stroke might over fuel at low loads but modern electronic controlled injection systems are designed to provide only the fuel required for the load because of environmental regulations, better efficiency and less smoke and longer life. Quieter too.

IMO running a modern 200 HP at half load will only result in it outlasting several owners grand kids provided it is set up to run at proper operating temperature.
The diesel boating world never seems to forget old stories.
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