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The crane was a Krupp 70 GMT with 188 ft of boom and jib. I’m certainly not implying that there are not other good lubes. I have a 29 Blackfin Combi with twin Yami 250s. It’s a heavy boat with 320 gal of fuel. I push her hard fishing 75 miles offshore. I can’t believe the lower units can survive...
I’m pretty sure full synthetic lube for lower unit is best. This is why. I had an 80 ton crane (125,000 lbs) it had planetary gear final drives at each wheel. We put synthetic gear lube in one side and conventional gear lube in the other. After a road trip we checked temps with infrared heat...
