Today I bought a Mercruiser 3.0 1994. All cylinders pressure are higher than 145. I will remove old 2.5L and mount 3.0, then connect 3.0 to the old wires.is it easy? But I have found there are different between 3.0 and 2.5.
Can anyone help me to upgrade?
I just cannot believe that the pressure are more than 150 PSI for thr 1987 Mercruiser motor. sure I will do the pressure testing again even water running testing
How come the pressure are more 150 PSI for the year of 1989 3.0L mecruiser motor? is it rebuilt? Can I buy the boat. should I test in the water. what should I pay attention ?
the fourth is an video. So I did not upload it. but it showed more than 150 psi. I remembered he batter was not charged regularly and only cranked it two time's when I tested it and they were 110， 110 PSI. then I gave up because the third and the fourth are blocked by tbe riser. now he tested...
A few ago I tested 1989 mecruiser motor and first and second are about 110 psi. So I quit continue to test the rest. He sent me his testing reading are more than 150. Is it possible?
I am going to buy a used 1989 2.5L mercruiser. He said the fuel pump is weak. But the cylinder pressure are about 140~145psi. I will run it with water to check if there is any water leaking into oil or not.
What other should I pay attention?
Does pressure good mean good motor or not?
Thank you
