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Old 03-20-2012, 07:26 PM
95_190_PS_PS 95_190_PS_PS is offline
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Join Date: Jan 2012
Boat: Previous: Mastercraft Prostar 190 LT1 PowerSlot
Location: Chicagoland
Posts: 48
Originally Posted by mgorczak1 View Post
Put some dielectric gel on it for a good connection. 10psi difference...I would say that's in spec... the engine pro's will confirm or correct....
10psi is definitely in spec, that however was between the highest pressure and the next highest. here are my results averaged over 5 tests.
#1 205 #2 165
#3 190 #4 205
#5 205 #6 195
#7 215 #8 180

The manual says that the compression pressure should be between 200 and 225 psi, and calls for a variation of 25% max between highest and lowest and if my math is correct the minimum allowance would be 161psi for the lowest pressure. However a 50psi variation seems like it should be out of specs. The numbers on the left side of the engine seem respectable, but the issue is definitely on the right side. I saw the crack in #2, but #4 fills up with water when the engine runs, so I don't know exactly what the engine issue is. Fortunately, I have a replacement ready to go in.
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