Water PSI on a 2005 350 Mag

Zorba

Active Member
May 21, 2008
1,324
East Harbor, Lake Erie
Boat Info
2006 340 Sundancer
Engines
Twin 8.1 Mercruiser
Any of you with this set up on a 260 remember off hand what your water PSI is at 3000-4000 rpm?
 
8 to 10 PSI for me.
 
I just ran her yesterday and it was 1.5 psi @ idle...
 

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