quick question about oil

[81_chapparel194]

what weight oil should i use in my lower unit (foot) on my outboard 90 hp evinrude

 

[DonHof]

Re: quick question about oil

I would think 90 weight like other lower units.

 

[81_chapparel194]

Re: quick question about oil

ok thanks

 

[MH Hawker]

Re: quick question about oil

A non foaming 80-90 is what most use, how ever it can depend on the year, some of the older rudes with a electric shift take a special oil. so it is better not to guess, and put year make and so on over in the rude section.

 

[UncleWillie]

Re: quick question about oil

Is there any reason you would not just use a Lower Unit Gear Lube ?

 

[bruceb58]

Re: quick question about oil

Use what your owner's manual recommends.

 

[louiefl]

Re: quick question about oil

If you have a 1964-65, 90 HP, it is electric shift and you need a special fluid.

http://www.boatingbuddy.com/pdf/GEAR LUBE Capacity Charts.pdf

For capacities, see the above.

Get a pump / hose adapter as well. You should be able to get the lube and pump from your local marine place or in a pinch, Walmart.

I raise my lower unit slightly so the lower drain plug is the lowest point. Make sure you do not loosen the wrong ones - there are typically 3 screws on your motor - drain, something that will ruin you day because it will release the internal workings of your lower unit, and the the overflow. The drain and the overflow should be the same type - slotted screw head that is slighly recessed. In between is a phillips head screw -do not take this out!

First, make sure you can loosen both plugs. Nothing worse than getting the drain open and not being able to get the top one out so you can fill it. The drain is on the starboard side, at the top of the skeg, just below the bulge. After removing this, the oil will slowly dribble out. Skip the phillips screw head near the water intake and remove the upper slotted screw - it should drain quickly.

Inspect the fluid - it should at worst be pitch black with fine metal powder - this is probably oil overdue for a change, but not abnormal. If it has a milky appearance like coffee, do not fill as you have a bad seal somewhere and water is getting in. Same goes for finding large metal bits.

Clean off both plugs (lots of opinions about replacing the screws / orings, so I'll keep out of this one). Fill from the bottom - avoid the temptation to fill from the top with a funnel. After attaching the pump (with the top screw out), start filling. When full, the lube will start to come out of the top hole. Once it looks like all new lube, install the upper screw. Have the lower screw ready, remove the fill tube and install the lower screw. A little fluid will dribble out, but that is normal.

Clean up your mess and take the used oil to your local oil recycling place and you are done.

 

[81_chapparel194]

Re: quick question about oil

If you have a 1964-65, 90 HP, it is electric shift and you need a special fluid.

http://www.boatingbuddy.com/pdf/GEAR LUBE Capacity Charts.pdf

For capacities, see the above.

Get a pump / hose adapter as well. You should be able to get the lube and pump from your local marine place or in a pinch, Walmart.

I raise my lower unit slightly so the lower drain plug is the lowest point. Make sure you do not loosen the wrong ones - there are typically 3 screws on your motor - drain, something that will ruin you day because it will release the internal workings of your lower unit, and the the overflow. The drain and the overflow should be the same type - slotted screw head that is slighly recessed. In between is a phillips head screw -do not take this out!

First, make sure you can loosen both plugs. Nothing worse than getting the drain open and not being able to get the top one out so you can fill it. The drain is on the starboard side, at the top of the skeg, just below the bulge. After removing this, the oil will slowly dribble out. Skip the phillips screw head near the water intake and remove the upper slotted screw - it should drain quickly.

Inspect the fluid - it should at worst be pitch black with fine metal powder - this is probably oil overdue for a change, but not abnormal. If it has a milky appearance like coffee, do not fill as you have a bad seal somewhere and water is getting in. Same goes for finding large metal bits.

Clean off both plugs (lots of opinions about replacing the screws / orings, so I'll keep out of this one). Fill from the bottom - avoid the temptation to fill from the top with a funnel. After attaching the pump (with the top screw out), start filling. When full, the lube will start to come out of the top hole. Once it looks like all new lube, install the upper screw. Have the lower screw ready, remove the fill tube and install the lower screw. A little fluid will dribble out, but that is normal.

Clean up your mess and take the used oil to your local oil recycling place and you are done.

it is an 81 90 hp manual shift got a quart from my marine supply followed your directions to a tee was done in haf an hour including clean up and drinking a cold adult beverage. i knew to leave this phillip head screw alone previous owner warned me when i asked why he had painted it red. i guess he learned the hard way or knew about it and painted it so he wouldnt ever touch it.. he didnt explain the reason he painted it but made a point to say removing that screw will cost you some good money and time so leave it alone.. now does the tilt/trim motor require servicing? fluid is clean and full no issues just wanted to know if its servicable or reccomended service intervals.. i believe in PM not repairing from lack of PM. its usually cheaper my way.. i used to be a run it till it breaks kinda guy buy i got tired and broke from being THAT guy.. oh relplaced my water pump too but thats another thread.. went perfect not an issue with old one just more PM since i didnt know when it was done last.. was still pliable and looked good no knicks or dry feeling but i can boat easier knowing its new. also is there any upper unit fluids or is it just lower? engine is 2 stroke so no real service to the oil there. also dielectric grease is a good product for electrical connections especially around moisture. just fyi