Alan Gomes
Sustaining Partner
Well, I guess that it may just remain a mystery. You've done what you should do for now by chainging out the oil several times and then topping off to the proper level. Just run it and see what happens. It may be just fine. Those transmisssions are really simple little beasts. (Regarding the proper level, see my earlier comment in this thread about how to use the dipstick with this transmission.)Alan, honestly the boat feels really dry inside. I definitely think that IF there has been high water in it, it would have been years ago, which would also not make too much sense. I will reach out to the old owner and ask. I think he is honest and maybe will shine light in my gear box conundrum. BTY, thanks for clarifying the oil type I should use in the gear box. Same in the motor crank, correct?
Yes, you can use straight 30 wt. in the engine, per the manufacturer. You can also use a multiviscosity weight, such as 15W40, also per the manufacturer. Currently I'm using 15W40, though I've used straight 30 wt. in the past. Your call. For the gearbox, though, definitely use straight 30 wt. In all cases, make sure the oil is rated for a diesel engine.