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ContinuousWave: Whaler Repairs/Mods
Counter-rotation lower unit
|Author||Topic: Counter-rotation lower unit|
posted 10-06-2002 06:18 PM ET (US)
I purchased a lower unit off of ebay for my 70 HP 1975 Evinrude for my 1967 Sakonnet. After I installed it and started up the motor, I realized the prop now turns counterclockwise. (There was no mention of this on the ebay listing). Are there any problems using this lower unit other than the need to get a left hand prop?
posted 10-06-2002 06:44 PM ET (US)
posted 10-07-2002 11:13 AM ET (US)
They did not make a CR lower unit in 1975. I think someone either rebuilt is backwards or you have your shift cable reversed.
posted 10-07-2002 12:08 PM ET (US)
what yr. was the drive that you bought? I agree with bigshot no crs
posted 10-08-2002 08:34 PM ET (US)
The ebay listing listed it as a 1975 model 70 HP. I had a 1975 70 HP Evinrude motor on it to begin with. I did not change the cables when I switched lower units. My original lower unit spun the prop clockwise. After I changed the lower unit the prop now spins counterclockwise. As you state, is it possible that someone rebuilt the lower unit incorrectly to make it turn counterclockwise? If this is the case, can I just purchase a left hand prop for it or are there any other issues? Thanks for your help.
posted 10-08-2002 09:03 PM ET (US)
I know this is a long shot but is it possible that somehow the shift/cable mechanism(s) got reversed? (I changed the throttle/shift on the console to angle left to fit my hand better but I had to also re-configure the cable hook-ups accordingly.)
Just a thought.
posted 10-09-2002 09:58 AM ET (US)
What about the way you hooked it up. Do you have full gear range with the shifter?
posted 10-09-2002 08:59 PM ET (US)
When I replaced the lower unit, I did not touch the shift/throttle cables. I just undid the connecting bolt up top, removed the 6 bolts holding the lower unit and removed the damaged lower unit. I reversed the process when installing the replacement. I contacted the ebay seller and he confirmed that it was not a counterrotation unit. But he also stated that there was a change in the shift lever on 1976 and newer models which might be causing the problem. He said the 1976 and above have a longer lever. I don't see how this would affect the rotation of the shaft though. Any ideas?
posted 10-10-2002 08:23 AM ET (US)
My last suggestion: Put the engine in the down/lock position and have someone move the shift/throttle. Observe the shift-arm movement. Something must become evident I would think.
posted 10-10-2002 10:09 AM ET (US)
So let me go through this again. You have the unit installed. When you run the boat it goes into reverse when the shifter is moved forward and forward when shifted into reverse?
posted 10-10-2002 10:31 AM ET (US)
you might have ,some how, reversed the 90 degree arm that changes the motion of the shift lever from horizontal to verticle..
|Tom W Clark||
posted 10-10-2002 11:25 AM ET (US)
Something is wrong here and I suspect it is very simple. Not only did OMC not make a counter rotation motor in 1975, they didn't, and still don't make one for a 70 hp motor. There's no way a lower unit from a late 1980's or 1990's V-6 has somehow inadvertently been substituted for a 1975 70 hp lower unit.
I also cannot imagine that a lower unit could be mis-assembled such that it is now miraculously a counter rotation unit.
I will also echo what has been said that it is unlikely that the motor will actually run in reverse/forward instead of forward/reverse. Have you actually run the motor?
posted 10-10-2002 11:30 AM ET (US)
I agree with Tom. It's got to be something simple. Did someone accidentally put on a 'wrong' prop? This is baffling.
posted 10-10-2002 12:04 PM ET (US)
I have asked twice about running the engine and shifter action.
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