shift shaft height 1983 johnson.

[JimeeB]

Sorry if this is the wrong place to post this question.. BUT...
I need the shift shaft height for a 1983 Johnson 70 hp.
We are replacing the lower unit with an earlier model.
is the shift shaft height determined by the power head year or lower unit year?
1983 is the powerhead yr.
1977 is the lower unit.
They are both the same drive shaft length (long shaft) and everything bolts up correctly.
THERE IS ONE THING THOUGH... I have noticed that on all of the shift shafts (other than original from the 1983) have a single offset, whereas the 1983 has a double offset. (sorry i dont have a picture) are the shift shaft offsets on an 83 unique to that year, or non compatible with earlier year lower units (GC's)?
mechanical shift. (not hydro)
Thank you.

 

[Daviet]

Re: shift shaft height 1983 johnson.

Look in the "Top Secret File", there is a list of shift shaft heights and a lower unit interchange chart, maybe they will ansewer your questions.

 

[dockman]

Re: shift shaft height 1983 johnson.

The "Top Secret File" only lists shift shaft heights to 1981. Need the shift shaft height for a 83 70 hp johnson.
Thanks

 

[JimeeB]

Re: shift shaft height 1983 johnson.

...

 

[JimeeB]

Re: shift shaft height 1983 johnson.

Dockman is correct. I already have the (Top secret file) and it only goes up to 1981.
That being said. can anyone please answer these couple questions for me? (The ones from my original post.)
Thank you.
And Daviet,. Just in case I have the wrong "Top secret file" how about link to get to the one in which you are referring to.

 

[wilde1j]

Re: shift shaft height 1983 johnson.

OEM shop manual will have the dimension. Sorry, I don't have the book for your motor.

 

[Daviet]

Re: shift shaft height 1983 johnson.

I was refering to the file here, I thought it went higher than it does. Next step is the factory manual. I will see if I can find the spec for you and post back tomarrow.