Which years of lower units will work

[BB79RANCH]

I have an '81 Johnson 50hp 2 cyl outboard and it runs really well, but after installing a used lower unit ('75 Evinrude 55hp) I've noticed it doesn't go into reverse as smoothly as the forward gear it kind of makes a chattering sound through the gear shifter. I have replaced the cables, the gear shifter and adjusted all the linkage as per my '81 OMC shp manual states to no avail. I need to know what years of production & horsepower of Johnson/Evinrude lower units will interchange with my outboard because I may need to have a good used spare and the cost of just putting in a clutch dog or reverse gear will undoubtedly cost more than a used lower unit

 

[BB79RANCH]

Re: Which years of lower units will work

I would GREATLY APPRECIATE any help with my inquiry.<br /><br /> Sincerely,<br /> Todd Tedder

 

[The Marine Doctor]

Re: Which years of lower units will work

Any of the small hub versions should work fine with your engine.<br /><br />When you are shifting...are you pushing it slowly into gear...or pushing it deliberately?<br /><br />If you push it slow...you will get grinding noises.<br /><br />TMD

 

[BB79RANCH]

Re: Which years of lower units will work

Thanks TDM for the quick response to my inquiry. I try to shift both forward and reverse as quickly/deliberately as possible, I don't "feather" the shifter to engage the gears. I was told that there may be a linkage problem with some '70's('73 or so) model lower units and my '81 powerhead. I appreciate any information you could afford me.<br /><br /> Sincerely,<br /> Todd Tedder