replace Mercruiser 2.5L 1989 with Mercruiser 3.0 1994

[liusigou]

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?

 

[Scott Danforth]

unbolt the old, bolt in the new

 

[Bondo]

But I have found there are different between 3.0 and 2.5.

Ayuh,..... Such as,..??

The long blocks are plug, 'n play,....
Differences in the accessories need to be dealt with,...

 

[liusigou]

I do not know where I should connect these two lines

 

[Bondo]

I do not know where I should connect these two lines

Ayuh,..... To the power steering unit, if there was one,....

 

[liusigou]

Ayuh,..... To the power steering unit, if there was one,....

It seems that both of thme are connected to the water in take? What happen if I just leave the two lines alone? water will leak?

 

[liusigou]

The serial NO. is 0B876780, The year is between 1988 ~1989. But my seller told me the year is 1994

 

[Scott06]

It seems that both of thme are connected to the water in take? What happen if I just leave the two lines alone? water will leak?

I am assuming your old boat does not have power steering and the new engine does?

the 8-10" long metal tube in the water intake hose is a powers teering cooler, this cools the PS fluid on the return line. Leave the cooler in the water inlet hose, remove the PS pump and 1/2" or so diameter hoses as you wont need them without PS

if you are swapping the complete engine it will be bolt in. just take the PS off if you dont need it