70 hp lower unit

[Ripcurl7278]

I have a 1976 evinrude 70 and the lower unit is cracked when i got it but it runs perfect. There is a guy selling a 1985 evinrude 70 as a parts motor. My question is will the lower unit bolt up and the shaft spline the same?

 

[eavega]

Re: 70 hp lower unit

I'm pretty sure they went from the large gearcase to the small gearcaese in 1983. Your '76 has the large gearcase. That 1985 has a small gearcase. Not compatible as far as I have been told.

Can you not have the LU welded?

Rgds

Eric

 

[Sixmark]

Re: 70 hp lower unit

according to the parts breakdown in 85 it could have a large or small gearcase......my 84 has a large gearcase so 83 wouldn't have been the changeover.

I strongly suggest you verify that it is an 85 and also what gearcase it has.

 

[dew2]

Re: 70 hp lower unit

Go here on the right side it lists all interchangable lowers http://search.boats.net/?r=t&q=0387343&x=17&y=15
Your motor is awful limited!

 

[Ripcurl7278]

Re: 70 hp lower unit

Im getting the motor for 200 with low compressipn for 200 but i just mainly need the trim pump and lower unit but the guy wont let me take it apart. Shifts fine and everything. Do you know what wouldnt bolt up? And could i combine the 2?

 

[Ripcurl7278]

Re: 70 hp lower unit

Or do you know if my powerhead would bolt up to the 85

 

[dew2]

Re: 70 hp lower unit

get your powerhead number and the other one go to the site I refered for cross reference and enter the numbers it will show years and models,HP ratings to fit.

 

[patrick4266]

Re: 70 hp lower unit

70/75............................(20 inch shaft)......................1978-late 1981
60/65/70/75................................................ .............1982-1988
50/60/70................................................ ..................1989-2001

 

[Sixmark]

Re: 70 hp lower unit

Heck if you are getting a 1985 model and it just has low compression, find the problem causing the low compression, could be as simple as a head gasket, it's worth checking it out, you may have a cheap fix on a newer motor.