What gear oil should I be using in the lower end of my 1984 OMC 150hp? :confused:Can I use Synthetic Gear Lubricant made by Sierra? Says it replaces Volvo Synthetic Gear Lube but doesn't say anything about what viscosity it is. Thanks in advance.:)
Can't fine the id plate or any identification on a Yamaha 9.9 4 stroke. any idea how I can id this outboard, I need to find out what year it is. Can post pic if need be. Thanks in advance.
