Gear oil in outdrive?

[Brucetafer]

i just got my bill for my vp 275 oil change service, the front cover was leaking, and noticed the shop put in quicksilver high performance gear oil... i thought the 275 needed 30wt non-detergent oil??? also, was charged for 3 hours of work, does the front cover have a gasket or does it need to be sealed with sealant?? im just wondering what took 3 hours of work... thanks

 

[zbnutcase]

Re: Gear oil in outdrive?

There is no "front" cover...post pic

 

[Brucetafer]

Re: Gear oil in outdrive?

the sterndrive cover with 2 screws in it with the VP 275 sticker on it

mine was leaking out the bottom...

 

[Brucetafer]

Re: Gear oil in outdrive?

bump...

 

[fossill]

Re: Gear oil in outdrive?

Yup, boat shops aint cheap. Not familiar with the VP but a check in the service manual should give a idea as to how long a job should take.

 

[dubs283]

Re: Gear oil in outdrive?

no seals on that cover, it just covers the shift linkage on the aft of the drive - i have seen many drives that don't have that cover and work fine, they are just scummy from algea

high perf is okay for duo-prop drives, single prop drives use 30 wt oil

it is possible they installed seal(s) for the shift cover?? - located in the area the large cover in your pic covers

 

[Brucetafer]

Re: Gear oil in outdrive?

no idea, but i want to change it back to 30 wt....

 

[HT32BSX115]

Re: Gear oil in outdrive?

Here's what VP says about VP drives right from the VP site....


http://www.volvopenta.com/SiteCollectionDocuments/Penta/Misc/drive_2_oil_rec_7745608.pdf

Here's additional info from Marine Parts Express

http://www.marinepartsexpress.com/outdrives.shtml

 

[90stingray]

Re: Gear oil in outdrive?

no idea, but i want to change it back to 30 wt....

I would want to make sure i was putting in what the manufacturer calls for. There is a big difference between 30wt and 90wt.

 

[HT32BSX115]

Re: Gear oil in outdrive?

I would want to make sure i was putting in what the manufacturer calls for. There is a big difference between 30wt and 90wt.

Not as much as you might suspect though......

Don't confuse SAE 90 (gear oil) viscosity with SAE 30 viscosity.....(crankcase oil)

The numbers don't mean the same thing. SAE 30 motor oil has approximately the same viscosity as 85W gear oil......

SAE 90 is approx equiv to 40 or 50wt crankcase oil.

The API and SAE did this long ago so there would be less chance for mistakenly putting gear oil in an engine! PLUS the high pressure additives would probably cause all sorts of weird deposits if burned in an engine!!

Some transmission manufacturers actually call for using engine oil (or even transmission fluids) in manual transmissions (presumably for improved mileage)

Here's a chart that compares the 2 from http://www.synlube.com/viscosit.htm (they have a great discussion on viscosity etc if you can get by by the marketing BS!!)

(Cant post the image because it's too BIG!!)

Click here--> http://www.synlube.com/images/viscosity_table_2.jpg


Cheers,

Rick

 

[QC]

Re: Gear oil in outdrive?

Man Rick, you're on a roll today. Great contributions!! I've been in the engine biz for 30+ years and I didn't know about the gear oil to engine oil scale difference . . .

 

[HT32BSX115]

Re: Gear oil in outdrive?

It just goes to show..one can turn ANY thread into an OIL THREAD!!

 

[Rob7Dawg]

Re: Gear oil in outdrive?

i have a duo prop and i got confused on the issue of what fluids to use. a friend told me to use 5 90 in it and i had a heck of a time trying to find it.

here the 5 is actually gl( gear lube) and 90 is the weight.

i went to napa and got there gl5 90w lube and used it, seems to work alright.

 

[HT32BSX115]

Re: Gear oil in outdrive?

In a DuoProp (or any Bravo) I would one of the synthetic marine gear lubricants or equivalent synthetic marine gear oil.

The marine gear oils claim to be able to handle small amounts of water contamination without degrading.....


From http://www.mercurymarine.com/parts-...cision-lubricants/high-performance-gear-lube/

Specifically formulated to help prevent failures due to water entering the gear housing.

From Amsoil; http://www.amsoil.com/storefront/agm.aspx

Universal Synthetic Marine Gear Lube SAE 75W/80W-90 (AGM)
High Performance lubricant engineered to meet the demands of marine applications. AMSOIL Universal Synthetic Marine Gear Lube provides:

• Excellent Gear and Bearing Protection even when contaminated with 10% water

///////////

Volvo doesn't appear to claim that their oil will do anything special if contaminated with water......

I think there might be something to the above claims though.......


There's at least one very experienced Marine mechanic (who's user name is related to autobody work) here on this site that regularly uses "regular" Mobil 1 Synthetic gear oil in drives with good results......



YMMV,


Rick

 

[Brucetafer]

Re: Gear oil in outdrive?

was told almost the same thing by the volvo mechanic... he said the 90 wt, takes water pretty good... thats why he used it since the older the gears, the more tolerance it has.. whatever imma run it till it blows up anyhow...

thanks for the good points and help!!

 

[Brucetafer]

Re: Gear oil in outdrive?

Ok, well after getting everything working 100% on my boat, im really worried about the gear oil... i pressure checked my outdrive and it was perfect, the oil has no water in it... my question again is should i keep the SAE90 or put SAE30 in there...

 

[QC]

Re: Gear oil in outdrive?

According to HT32BSX115's chart in Post #8 ^^^^^^^^^^ the AQ275 drive uses "Same as Engine Oil" as per Volvo.