25 hp Mercury parts compatibility

[89Aluma]

Hello again just a quick question I found a Parts motor for my 88 Mercury 25hp it needs a new crankshaft connecting rod and a piston, the motor I found is $150 1981 Mercury 25hp that still runsish... are they compatibile??

 

[flyingscott]

Does your motor have a thermostat in it?

 

[89Aluma]

No Title

It doesn't is it suppos to??

 

[89Aluma]

I just took look at some parts diagrams and yes it has a thermostat that apparently needs to be installed...never thought to check that when I got it

 

[flyingscott]

You need to find a parts block like yours one that has a thermostat. The 81 has different pistons that don't interchange with yours and no thermostat. Where are you located

 

[89Aluma]

Are you certain, I've looked at every set of serial numbers's parts list they all list the same part numbers for the comments I need.

 

[89Aluma]

I'm sorry your correct thank you for your help I was looking at the wrong parts list, I need to find a newer one by a few years it looks like I could use the crankshaft but not the rods or Pistons

 

[flyingscott]

Find one that has the thermostat should start about 1985/86 1987for sure up to about 1993. Mercosil parts also cannot be used in your motor.