How much gear oil should there be

[trucker28]

I just drained the gear oil out of the lower unit and it was white and milky and like only less then a half ounce of oil came out of it. How much should there be in there. Is that little bad and is white and milky bad thanks again

 

[56 rude]

Re: How much gear oil should there be

I just drained the gear oil out of the lower unit and it was white and milky and like only less then a half ounce of oil came out of it. How much should there be in there. Is that little bad and is white and milky bad thanks again

for the limited info you gave ,yes, bad and bad.

 

[ezeke]

Re: How much gear oil should there be

The gearcase holds _9_ ounces of oil. or enough to run out of the vent hole when the oil is pumped into the drain/fill hole.

While you have the gearcase empty, have vacuum and pressure tests done so that you can find the source of the leak(s).

 

[trucker28]

Re: How much gear oil should there be

for the limited info you gave ,yes, bad and bad.

Sorry I thought I put year make and model it is 1964 18HP johnson there was like a rubber seal that was on one of the screws thas was torn up. The fluid that came out was just white and milky it did not seam to have any metal in it

 

[trucker28]

Re: How much gear oil should there be

The gearcase holds ____ ounces of oil depending on the model, or enough to run out of the vent hole when the oil is pumped into the drain/fill hole.

While you have the gearcase empty, have vacuum and pressure tests done so that you can find the source of the leak(s).

How do you do a vacuum and pressure tests it cant leak from to far just maybe a gasket or a couple of the vent and drain screw I would think.

 

[56 rude]

Re: How much gear oil should there be

that motor holds 8.3 ounces.the torn up o-ring is most likely the source of water entry into the lower-unit.they should be replaced every time you do a lower-unit oil change,any omc dealer will have them and their cheap.

 

[Vic.S]

Re: How much gear oil should there be

It can leak from numerous places. Most likely are the propshaft seals because they are easily damaged by fishing line and the vertical drive shaft seals, not forgetting the drain and level plug seals if not replaced after an oil change.

You could just replace the level and filler plug seals, trying it and inspecting the oil for any signs of milkiness after a short period of use but its not what the professionals would recommend. (probably what I'd do though)

If the pump impeller has not been changed recently then consider doing that and the driveshaft seals at the same time

A dealer should have the equipment necessary to vacuum and pressure test the unit, identify all the leaks and confirm that all is tight after repair

 

[trucker28]

Re: How much gear oil should there be

It can leak from numerous places. Most likely are the propshaft seals because they are easily damaged by fishing line and the vertical drive shaft seals, not forgetting the drain and level plug seals if not replaced after an oil change.

You could just replace the level and filler plug seals, trying it and inspecting the oil for any signs of milkiness after a short period of use but its not what the professionals would recommend. (probably what I'd do though)

If the pump impeller has not been changed recently then consider doing that and the driveshaft seals at the same time

A dealer should have the equipment necessary to vacuum and pressure test the unit, identify all the leaks and confirm that all is tight after repair

Thanks for the info I am going to change the water pump this saturday I will get the seal for the filler plug and drain plug are they just any o ring or is it spacific one to use. I have not picked up the water pump kit do you think the driveshaft seals would be in the kit. thanks

 

[Rick.]

Re: How much gear oil should there be

They are a nylon type of material and should be gotten from OMC as they are important. I doubt you'll get drive shaft seals in a water pump kit. I just change the impeller normally. Rick.

edit:Just for clarity. You do know that you fill through the drain hole and the top hole is considered to be a vent and overflow. Once the vent starts dripping put the plug in and then plug the bottom.

 

[trucker28]

Re: How much gear oil should there be

They are a nylon type of material and should be gotten from OMC as they are important. I doubt you'll get drive shaft seals in a water pump kit. I just change the impeller normally. Rick.

edit:Just for clarity. You do know that you fill through the drain hole and the top hole is considered to be a vent and overflow. Once the vent starts dripping put the plug in and then plug the bottom.

Nylon type material do you think any dealer would have them for a 1964 instock or do you think they would have to order it. fill from bottom hole tell it comes out of top then plug top then plug bottom gotcha thanks

 

[ezeke]

Re: How much gear oil should there be

You can order a bag of 50 Sierra vent/fill/drain seals here at iboats so that they will be on hand when you need them. They fit most motors' plugs; Part # 18-42481-9.

http://www.iboats.com/Johnson_Drain...6786070--**********.067729073--view_id.271318

 

[trucker28]

Re: How much gear oil should there be

They are a nylon type of material and should be gotten from OMC as they are important. I doubt you'll get drive shaft seals in a water pump kit. I just change the impeller normally. Rick.

edit:Just for clarity. You do know that you fill through the drain hole and the top hole is considered to be a vent and overflow. Once the vent starts dripping put the plug in and then plug the bottom.

Nylon type material do you think any dealer would have them for a 1964 instock or do you think they would have to order it. fill from bottom hole tell it comes out of top then plug top then plug bottom gotcha thanks

 

[EN2]

Re: How much gear oil should there be

Another known source of leakage in a mill that old is shift rod 0 ring. They get hard as a rock.

 

[trucker28]

Re: How much gear oil should there be

You can order a bag of 50 Sierra vent/fill/drain seals here at iboats so that they will be on hand when you need them. They fit most motors' plugs; Part # 18-42481-9.

http://www.iboats.com/Johnson_Drain...6786070--**********.067729073--view_id.271318

opps posted the same post twice some how
Thanks for the part number on the seals