1960 Seahorse 5.5 hp lower unit lube?

[William Antley]

Hello everyone! I am new to these forums and I have a good, but possibly overused, question about my outboard. I have a 1960 Johnson Seahorse 5.5 hp motor model CD-17 and I need to change the lower unit lube as I don't know when the last time it has been changed. <br />I acquired this motor just a few months ago and haven't been on the water with it yet because I want to give it servicing before using it.<br />I obtained an OEM service manual from a person at another forum and it shows this and other motors and all the info I may need for service except, the recommended lower unit lube is no longer manufactured.<br />Can I use a modern lube in the lower unit and if so, which would be best? Also, I'll be wanting to get some parts for this motor, specifically a water pump impeller. It may be OEM and may need replacing in the very near future. Where could I find an impeller?<br />I'm pushing a 12' fiberglass semi-V jon style boat and won't be trying to break or make any speed records, just using it for fishing.<br />Thank you for any assistance any of you can give me.

 

[William Antley]

Re: 1960 Seahorse 5.5 hp lower unit lube?

Thank you Middleground! I'll take your advice and info to heart. I want this motor to be in its best shape before I get it wet!

 

[seahorse5]

Re: 1960 Seahorse 5.5 hp lower unit lube?

An impeller for the 5.5 is the same one used from 1954 to 1974, part number 379764 for $11.05. The complete water pump kit with housing, plate, gaskets, screws, impeller, etc. is about $36 under part number 391391. These are available at any Johnson/Evinrude dealer.<br /><br />For the gearcase, originally they used hypoid 90 (called type B back then) on that model but now they recommend the HiVis or better yet, the UltraHPf lube, also available at your local dealer.