Lower Unit Lub questions for 1975 Johnson 6 HP

[Outboard Tex]

After two years of storage I am returning my Jon boat and 1975 Johnson 6HP back to the water! Today, I drained the lower unit and the fluid was brown and seems in real good shape. I do not have a manual on refilling the lower unit and have two questions:

1. Can I use High Viscosity lower unit gear lub SAE 80W-90? If not, recommednations.

2. Do I fill it from the bottom screw laying the motor on the ground?

Thanks!

 

[tx1961whaler]

Re: Lower Unit Lub questions for 1975 Johnson 6 HP

1. 80W-90 is correct. The marine type is better because it has additives to handle water intrusion better

2. The motor is filled upright, like mounted on a boat. Remove both top and bottom screws (don't touch any phillips head screws).Fill it from the bottom until it squirts from the top vent .

 

[jasper60103]

Re: Lower Unit Lub questions for 1975 Johnson 6 HP

Also, buy a couple new vent/fill plug nylon washers, they're cheap.

 

[Outboard Tex]

Re: Lower Unit Lub questions for 1975 Johnson 6 HP

Thanks for the quick feedback and support on my servicing. I also changed out the 2 spark plugs today and looking forward to firing up the old dog!

 

[Outboard Tex]

Re: Lower Unit Lub questions for 1975 Johnson 6 HP

Thanks for the washing tip...I'll take you up on that.

Outboard Tex

 

[Mas]

Re: Lower Unit Lub questions for 1975 Johnson 6 HP

You may want to put some 2 stroke or fogging oil in the cylinders via the spark plug hole and hand crank the motor to give the cylinders some oil before firing her up.

MAS

 

[Outboard Tex]

Re: Lower Unit Lub questions for 1975 Johnson 6 HP

MAS

Thanks for the feedback and the tip on the cylinder oil.

O.T.

 

[tolbertn]

Re: Lower Unit Lub questions for 1975 Johnson 6 HP

Being the rookie that I am, i removed the philips head screw and cannot get it back in. What do I do??

1. 80W-90 is correct. The marine type is better because it has additives to handle water intrusion better

2. The motor is filled upright, like mounted on a boat. Remove both top and bottom screws (don't touch any phillips head screws).Fill it from the bottom until it squirts from the top vent .

 

[SeaKaye12]

Re: Lower Unit Lub questions for 1975 Johnson 6 HP

Ouch. Happens all the time.

Did you see Joe Reeves' answer to the post just above yours? His engine is a 40 HP but Joe is the man when it comes to correct answers.

http://forums.iboats.com/showthread.php?t=551373