is it possible to replace 1989 40 hp power head, classic 50 Mercury, with 1987 45 hp

[nmesllc]

We have a 1989, classic 50 model, 40 hp with a locked-up power head, we also have a 1987 classic 50, 45 hp in good condition...is possible to replace the 40 hp power head with the 45 hp power head Both are oil injected.

 

[Laddies]

Re: is it possible to replace 1989 40 hp power head, classic 50 Mercury, with 1987 45

Yes, the powerheads will interchange but the 45 has auto blend oil injection which is junk and it would be best to use premix fuel.

 

[nmesllc]

Re: is it possible to replace 1989 40 hp power head, classic 50 Mercury, with 1987 45

Yes, the powerheads will interchange but the 45 has auto blend oil injection which is junk and it would be best to use premix fuel.

Thanks and I will follow your advice, question - do I just replace the fuel time or is there electrical connections and other items that needs to be disconnected...

 

[Laddies]

Re: is it possible to replace 1989 40 hp power head, classic 50 Mercury, with 1987 45

Use your wiring harness, remove the engine mounted oil tank and tape off the 2 blue wires that go to the tank sensor