[casi77]

replaced the lower unit.. everything matched up good. Issue is, when put on fw, it goes rv && when put in rv it goes fw..

what could be the problem?

[tashasdaddy]

there was a change in the 70's that require 2 different lowers,, and shift linkage, sounds like you got the wrong one. what is the model number of your motor.?

[casi77]

mid to late 70s motor.

lower unit is from another motor, i can get the model number tomorrow.

here is what happens:

- when control box (shifter), put in reverse, the shifter cam goes down (which pushes the shift rod down), and boat moves forward

- when control box (shifter), put in forward, the shifter cam goes all the way up (shift rod pulled up), and boat moves reverse

shifter cam (which which holds the shift rod) part number is 318556-S

[casi77]

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[casi77]

Found some info below on another thread.. Is this all I have to do for this to work on my motor?? Those linkages, looks the same as I remember!
thanks

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in: http://forums.iboats.com/showthread....gears+reversed
another one: http://forums.iboats.com/showthread....gears+reversed
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question are the main shift bellcrank arm under the carburetors and the shift bellcrank bolted on the side of the block (nested with the throttle linkage bellcrank), plus all the related, attached connection arms and linkages. I swapped one of these a few years ago and it worked fine... It did require removing the powerhead, though, as the bellcrank under the carbs wouldn't come out without it... Not a difficult job - took about 2 hours.
- Scott
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yep, 73 to 77 are the reverse of 78 and newer. 73 to 77 where shift assist. you would have to change out the complete linkage.

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[casi77]

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[tashasdaddy]

i don't believe so, there was a change 76 should be a hydro-mechanical shift, 80 is straight mechanical. i will investigate.

[Dhadley]

All you need is the shift linkage off the 1973 motor. You just have to keep the linkage with the lower unit. A fairly easy swap.

[casi77]

so need to find shift linkage and replace it.

[kerik7]

hello,

I am having the same problem with my evinrude 70 3 cyl. is this the same lower unit? If so I can check my motor and see if we could trade something out to make both units work.

[Chinewalker]

The 70hp unit will not work on the 55. ONLY solutions are to swap in a correct unit or swap out the shift linkage at the powerhead...
- Scott