There may be a better solution, but I would use motor oil. The same stuff you use when changing the oil. Or possibly lower unit lube (80-90wt). IMHO, what you use is less important than how often you use it. Just don't use WD-40.
When I bought my first jetski (a SeaDoo) all of their lube points were to be done with "Bombardier Lube", in a spray can. I always use OEM stuff per the owner's manual.
Nevertheless, that product has become my goto for everything now. It's just that good.
Even though I now own a Yamaha I still use Bombardier Lube.
My mercury owners manual just says lightweight oil. I guess I’m not exactly sure what that is? Is the oil you use for pneumatic nailers considered lightweight oil?
Always use Hydraulic red fluid which is very thin to lubricate all knids of mechanisms specially the ones in which thick oil won't reach or lubricate properly. Try it...
My mercury owners manual just says lightweight oil. I guess I’m not exactly sure what that is? Is the oil you use for pneumatic nailers considered lightweight oil?
I've found over the years, 3-1 oil varnishes up over time. I'm mostly using gun oil or sewing machine oil on stuff like that nowadays. However I haven't tried hydraulic oil.
Hydraulic oil is intended for high pressure applications, not really for "lubrication", per se'. Not that it doesn't lubricate, but it would not be my first choice unless I had a can laying around and it was free.
My guns function awesomely with Hoppes Gun Oil, and at $1.49 a can how can you go wrong. (now, if you have a US M1 Garand, the oem US Mil Spec oil would be even better I would imagine.....but that's not readily available)
I ran out of gun oil a couple years ago, the local hardware and big box stores only had it in spray cans now. Messy. I went to Wally world and looked in the sewing department, saw sewing machine oil, it stated on the bottle that was for Guns also. And cheaper than regular gun oil,
As do I. When CAI was selling them for $39 with free shipping I was buying one a month. The u-fix-ums at $16.95 were even a better bargain. The performance is real good, second only to any USA made item. I doubt many tankers actually survived. If you find one it would probably be a home made variant.