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-   -   gear lube (https://www.offshoreonly.com/forums/drives-lower-units/250799-gear-lube.html)

endeavor1 07-14-2011 01:29 PM

Mine are still running strong. Oil isnt even begining to look or smell burnt like the merc oil would by now.

Quinlan 07-14-2011 03:59 PM


Originally Posted by JaayTeee (Post 3452739)
mine are still kickin'

Mine TOO!!
Well havent put the oil in yet but I have 15 hrs on my new uppers so oil change comming soon.

I just SO DAMN happy to get 15 hrs outa some drives!

kreed 07-15-2011 08:46 AM


Originally Posted by SS930 (Post 3452685)
You better get Nellie started on a 2nd job! :lolhit:

If I blow an IMCO Extreme, we'll ALL be getting second jobs! Hahaha!

onesickpantera 07-15-2011 06:48 PM

I run Wal-mart brand 5w-30 motor oil. The thinner oil gives me an additional 500 rpm and 5-6 mph! I just change it more often.

JasonSmith 07-15-2011 07:06 PM


Originally Posted by onesickpantera (Post 3453890)
I run Wal-mart brand 5w-30 motor oil. The thinner oil gives me an additional 500 rpm and 5-6 mph! I just change it more often.

Awesome choice! :lolhit:
Do you run split-fire spark plugs & Accell wires too? :grinser010:

RaggedEdge 07-15-2011 09:26 PM


Originally Posted by JasonSmith (Post 3453898)
Awesome choice! :lolhit:
Do you run split-fire spark plugs & Accell wires too? :grinser010:



Sam Walton was a real sharp guy. Never knew he had figured out the Bravo deal.
Live and learn I guess. :lolhit:

07DominatorSS 07-15-2011 09:47 PM

Update on AMSOIL MCF, Motorcycle 10w-40, in 2011 Bravo X drives with new Merc 502's in front of them. So far, about 25 hours, pulled one top cap, and gears are perfect!!! In that duration, one poker run, and some decently longer runs around the lake. Boat will run 91.7 GPS, so....

articfriends 07-16-2011 08:26 AM


Originally Posted by John the Drive Man (Post 3436700)
It all depends on what Brand of oil you are selling, in what is the best. It's all an opinion, period.
Never have I had a drive fail because of oil, if I'm using the right product. Mercury has more test time on oil when it comes to out drives and outboard lowers than anyone in the industry. In all my 45 years with the Mercury Outdrives, have I had a drive failure because of oil. And I have 15 World Titles under my belt. It's not about just oil, it's how the gears and bearings are set according to the HP. Gear setting is the most important. No matter what. But everyone out there tends to always blame the oil first. I guess that's the easy way out.

John, I would have to respectively disagree, I could not get lower gears to last past 15 hours with merc hp oil (1050-1100 hp/1000 plus ft lbs of tq), I didn't have much better luck with Royal purple but the amsoil sever gear has made a night and day difference, I don't sell the stuff either. I found the best gear life in the lower with B/L set between .014-016 with gears that have been cryoed and iso rem polished, I assemble my own drives. I am getting around 60 hours from lower gears these days and the uppers are over 350 hours , Smitty

articfriends 07-16-2011 08:26 AM


Originally Posted by 07DominatorSS (Post 3453995)
Update on AMSOIL MCF, Motorcycle 10w-40, in 2011 Bravo X drives with new Merc 502's in front of them. So far, about 25 hours, pulled one top cap, and gears are perfect!!! In that duration, one poker run, and some decently longer runs around the lake. Boat will run 91.7 GPS, so....

What were you running before and did you gain any speed?

articfriends 07-16-2011 08:34 AM


Originally Posted by cprperformance (Post 3443985)
Well, put in the 75/140 severe gear 8 qts. to 1 qt. lucas and so far very happy with the results. Shifts much softer and smoother in and out of gear. Won't know about gear life until tear down, but I think that this is going to be a very benificial formula.

Did your boat slow down from the thicker oil? When I was doing extensive lower gear testing a few years back I found the 85/140 Royal purple slowed my boat down about 4%, In testing that was almost back to back boat ran 92-93 with 80/90 and wouldn't break 88-89 mph with the thick stuff(I had less power then than now), being supercharged with a inner-cooler boat pretty much runs the same number too regardless of weather conditions on typical Mi days unless air is really good with low ambient temp, Smitty


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