Harmonic Balancer pulley of Mercruiser 3.0 replacement

L

liusigou

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Can the pulley at my Mercruiser 2.5 replace 3.0? Current the mercruiser 3.0 was broken.

3.0 Serial No. is B785395
2.5 Serail No. is 0C397712

What kind of puller and installer is good for this project?

Thank you
 
Bondo

Bondo

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liusigou said:
Thank you all

I have a old mercruiser 2.5 1989 and it worked. Can I take it off and mount it into Mercruier 3.0 ?
Click to expand...
Ayuh,...... The pulleys maybe interchangeable, but the balancers are not,...
The 3.0 l has a balancer, the 2.5 l has just a pulley,......
 
Alumarine

Alumarine

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Is the pulley you need the one that's on the water pump or the pulley that's on the front of the crankshaft?
 
K

kenny nunez

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While the pulley and flange from a 2.5 will fit and work it is not the right part.
The 2.5 has a very smooth idle compared to the 3.0.
The 3.0 has more torsional vibration because of the longer stroke.
Make sure that the timing mark on the timing cover is the same as your 2.5 engine.
 
L

liusigou

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Is this harmonic balanced pulley great OT not?
 

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liusigou

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How can I push the harmonic balance in? Rubber hammer or special tools?
 

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Alumarine

Alumarine

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liusigou said:
How can I push the harmonic balance in? Rubber hammer or special tools?
Click to expand...
Heat it up in an oven and tap it on.
Make sure you don't melt the rubber.
Google "heat harmonic balancer in oven" for some ideas.
 
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