oil found under props?

[tigerlegend2000]

Hi everybody
i'm a newbie to this boating stuff, my question regard to that yesterday i saw some oil under the Mercury OB 115HP 6cyclinder... is that my lower unit will goes bad soon.... you know... props.'s leaking... water will get into lower unit... is anyone experience somthing like that... i'm not sure it's the fogging oil dripped down or oil from the lower unit... but i saw it's came out from the props.
i'd appreciated any reply from here
thanks
newbie

 

[Laddies]

Re: oil found under props?

Smell it if the engine was fogged it's probably fogged oil, if it's gear lube it will smell bad.

 

[rndn]

Re: oil found under props?

As stated above, the best way to tell is by smelling it. If you don't know what gear lube smells like, buy a quart as you'll need it when you change the lower unit oil prior to putting it away for the season. You should always change the lower unit oil prior to storing an outboard. It will also tell you if water has mixed with the lower unit oil.
Welcome to the forum.

 

[ddennis]

Re: oil found under props?

If you suspect it is from the lower unit, I would go ahead and buy some new and change the fluid just to inspect... better to change it now and find out you have a bad seal, rather than find out when the unit fails because of no oil!

 

[tigerlegend2000]

Re: oil found under props?

what do you guys recommended gear oil weight for this lower unit? it's a 1985 mercury outboard with 115Hp 6 cylinder, 2cycle engine? thanks... and is there any tool or procedure to change the oil? thanks again...

 

[Laddies]

Re: oil found under props?

Mercury Super Duty or any GL-5 rated oil- A screwdriver and fill the unit from the bottom to the top vent screw

 

[j_martin]

Re: oil found under props?

what do you guys recommended gear oil weight for this lower unit? it's a 1985 mercury outboard with 115Hp 6 cylinder, 2cycle engine? thanks... and is there any tool or procedure to change the oil? thanks again...

You need a quart of Lower Unit Lube, not automotive gear lube. WalMart has Mercury LU lube and also a plastic pump that fits a quart bottle and screws directly into the lower (drain) plug of the LU.

Acquire 2 net drain plug gaskets before you start the job.

Procedure is to drain all the old fluid. If it has water in it or is milky in color, have the LU serviced. (seals). Refill by pumping into the drain plug till it runs out the top. You'll lose about an ounce of gear lube when you remove the pump and install the plug. That's calculated into the procedure, and is about the head air space needed in the LU.

hope it helps
John

 

[achris]

Re: oil found under props?

what do you guys recommended gear oil weight for this lower unit? it's a 1985 mercury outboard with 115Hp 6 cylinder, 2cycle engine? thanks... and is there any tool or procedure to change the oil? thanks again...

I only use Merc High Performance Gear Oil. It's synthetic and is an excellent water repellent.

Procedure:
Make sure the engine is in the down position. Put a container under the lower unit. Remove the oil fill screw at the bottom and the 'Vent' screw just above the anti-cavitation plate. Allow all the oil to drain out. If it looks milky, then it has water in it. Filling should be done from the bottom hole. Pushing the air out of the top hole. When you see oil from the top hole, put the top screw back in, then quickly remove the oil bottle from the bottom hole and put the screw in. Put new washers on both screws before putting them back in.

Chris.........

 

[tigerlegend2000]

Re: oil found under props?

thanks guys..... great help.... i'll try it before spring ....

 

[tigerlegend2000]

Re: oil found under props?

You need a quart of Lower Unit Lube, not automotive gear lube. WalMart has Mercury LU lube and also a plastic pump that fits a quart bottle and screws directly into the lower (drain) plug of the LU.

Acquire 2 net drain plug gaskets before you start the job.

Procedure is to drain all the old fluid. If it has water in it or is milky in color, have the LU serviced. (seals). Refill by pumping into the drain plug till it runs out the top. You'll lose about an ounce of gear lube when you remove the pump and install the plug. That's calculated into the procedure, and is about the head air space needed in the LU.

hope it helps
John

i went to walmart but can't find the pump... do you know where it is in walmart and what is it look like? they have the universal pump but nothing screw-in.... thanks .. let me know