TOPIC: OMC Outdrive Lubrication

My original owner's manual specifies OMC Sea-lube, whatever that is, and I seriously doubt that it's still available. So what do you use? The manual specifically reads do NOT use 90 wt gear oil. Someone told me to use outboard motor oil. I don't want to guess. Help!

If you are asking what gear lube to use in that Dual Deluxe, you need "Type C"

Thanks, Jim. That's what I needed to know.

The "modern" equivalent to "Type C" is called "Evinrude Johnson Premium Blend". It's compatible with electric-shift L/U's.
With Bombardier ceasing manufacture of Evinrude outboards, the supplies are drying-up. Still stocked by some dealers and aftermarket sellers. Some is still for sale on eBay. P/N 775609 for a quart bottle.

Sierra Marine also sells their version of this oil, here's a bunch of that for sale on eBay:

https://www. ebay .com /sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=Sierra+18-9620&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=Sierra18-9620

You'll have to take the spaces out of the link, this site still parses eBay links.

Walmart sells the Sierra stuff, too: www.walmart.com/ip/Sierra-18-9620-2-Type-C-Gear-Lube-1-Quart/32925901

Better stock up, it ain't getting any cheaper!

Thanks...I already ordered three quarts of the Sierra. No need for me to stock up though. This is for a customer's boat and I'll never work on a vintage OMC outdrive again. Every single part is obsolete and expensive when you finally find it. In the future, I'll stick to Mercruisers and inboards.

I don't blame ya! I rebuilt an old ball-drive OMC outdrive years ago, and vowed to never work on one again! They truly are a pain, especially if you aren't used to working on one. The only thing worse I ever worked on was a Force "L-Drive", which was nick-named "Hell Drive" because it was the worst-designed, hardest-to-work-on, most unreliable marine small propulsion unit you've ever messed with. What a piece of trash, it certainly earned its name! The early Cobra outdrives were junk, too. I should know, I had one in a Seaswirl Spyder with a 4.3 V6. Great boat, excellent engine, lousy outdrive! Worst-shifting unit ever. Tons of fiddly, expensive parts. What's not to like!!

Where is your adventure? I like those Fossil Drives.
I just ordered a new 5 gallon pail of Sierra type C from Summit Racing. Best pricing I can find.