Originally Posted by Smitty (Post 3412327)

articfriends-

I find it amazing that you don't break uppers, only lowers. For me it is the opposite. I break teeth clean off of the port drive upper gears. And I ease it up on plane and never air it out. I just have a lot of torque !!

Originally Posted by articfriends (Post 3412565)

On the surface what your saying would appear to be true BUT in actuality you are wrong. I have ran 750hp, then 950 hp and currently 1050 to 1100 hp (depending on my blower pulley) thru my max worx drive, I currently have the same upper gears I bought 8 or 9 years ago approaching 400 hours. Lower gears have always been a different story, when I had 750 hp they would last a whole season before failing (50-100 hours), When I increased my power to 950 they would last closer to 20-25 hours, when I went to 1050 plus hp they would last closer to 10 hours. I always ran Royal purple oil on the advice of "experts". I tried having additional heat treating done to my gears, diamond like coating and Cryo/iso finishing. I found that a set of Cryo/iso'd gears would last 20-30 hours-about a half of a season, I switched to a mix of Amsoil/lucas addittive and instantly my gears were lasting 40-60 hours before failing, a big improvement. If the Neo oil does give me a longer life span on my gears it WOULD be worth 200$ a gallon (although its actually only around 90$ a gallon). You could tell me I should have bought a imco scx or a B-max but when I started running this kind of power years ago the scx did not exist nor did any of the other current offerings and the B-max suffered from quality control problems and still used stock mercruiser bravo lower gears anyways and upper failure has never been a problem for me anyways. Necessity is the mother of invention and If the new owner of B-max has formulated a specially blended oil that increases gear life then that is a great thing, I have a serious investment in my current drive so I am not switching any time soon , my boat is getting old and I'm not going to dump another 15 or 20 K in a better drive. Now, will this new oil keep a Bravo based drive from shearing off a shaft or blowing up any of the other stock, non-upgraded parts, of course not but I am way past that, Smitty

Originally Posted by Fountain4402 (Post 3412601)

good points and I like the experimantation of making things going faster its like cars. But at the same time get sick of hearing it because people push things way past what they should and scratch their heads at why their stuff breaks

Originally Posted by 47EXCALIBUR (Post 3370978)

if you want the drive gears to last longer ie,,, pitting and cracks to stop... we run Amsoil 75/90 severe gear with a blend of Lucas engine treatment,,,this will stop the premature failures of gears especialy XR gears... i ran one drive with Merc HP gear lube and the other with Amsoil/Lucas mix to test and see the results. both Bravos with new gears, fresh rebuilds,, at the end of the season 50hrs about,,, i took both drives apart.... the drive with the Merc gear oil needed new gears (pitting wear marks) the Amsoil/Lucas drive did not need new gears ,, no sign of wear..... most of the outdrive shops/vendors repackage this combination and resell it as their own "special" blend....... mix one quart of Lucas with 4 quarts of Amsoil 75/90 severe gear

Originally Posted by Dean Ferry (Post 3436528)

What is the name of the Lucas Engine oil treatment?
Thanks,
Dean