Anyone Know the weight of Merc/Quicksilver High Performance gear Lube?

I would say about 4lbs. a quart.
Dave

Thanks but what I am looking for is the viscosity. As in is it 80w 90w etc.?

I know, I just couldn't resist. To answer your question I think it's 90 wt. but not positive. I havn't used it in years.
Dave

I bought 3 1L jugs for $60.00 - pours like 60-70 weight.

The gear lub. is refered to as High Performance Gear Lub. +
They no longer disclose the viscosity of the gear lub. You
should be using only Mercurys High Performance Gear Lub.+

I don't know the exact viscosity but I have been using 75-90 mobile 1 synthetic gear lube for around ten years and never once had a drive problem.

In 1974 when I bought the Checkmate/Alpha, the dealer recommended the Quicksilver gearcase oil or any good quality marine gear oil. I'm not sure that was the best advice , but how long is an outdrive supposed to last? (Sure it's how you use it, but, really, what is reasonable??)

Our lake is rife with rocky shoals and the water drops 10' - 13' over the course of the summer...I ripped off 5 gear cases in 20 years and not much chance to check out how gear oil would affect longevity .

The last one was in 1993 and I replaced the lower with a brand new Merc unit. Since the QSilver was pricy and a pain to find at times, I used Outboard Marine Corp. gear oil, Canadian Tire bulk 90w, and the QSilver performance lube on and off. The drive performed well, but with ALOT of groundup metal material on the plug and it gave up in 2005 - 12 years.

Now I've replaced the upper and lower with fresh Merc, I'm running it with the QSilver perf+ with a few grindings showing up in it's first two seasons - but it is still in the "break in" period. I really want to see NO grindings once broken in and using the specified lubricant, which should mean a longer life than 12 years? Anyone older than me, who can remember?