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Old 06-13-2013, 06:58 AM   #27
jleonard
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And I think all boats/fuel systems have their own threshold as well.
My "ex" an old 34 Mainship with a 6BTA Cummins would start to lose a little rpm at the upper end of the range when the guage read about 8 or 9. So there was plenty of warning.
My current Albin with the 120 Lehman does not like to run over about 7 and it will give almost no warning of a problem.
Plus depending on your filter system (don't want to get this going) the vacuum reading can change rapidly or slowly.
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Jay Leonard
Ex boats: 1983 40 Albin trunk cabin, 1978 Mainship 34 Model 1
New Port Richey, Fl
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