papichuloy2k
Seaman Apprentice
- Joined
- Nov 8, 2012
- Messages
- 42
Hi everyone,
After reading so many posts from Iboats regarding how to change the gear oil/fluid in a Cobra OMC outdrive, I decided to get to work and do it in my new (to me) boat. My boat is an 89 Bayliner 1950 Chevy engine.
Let me throw a disclaimer that I am not a certified marine mechanic and that I am not responsible for any damage that may occur to you, your boat and anyone else. This write up is for informational purposes only. Now, disclaimer aside get to work.
~You will need two quarts of gear oil suitable for your boat.
~A manual pump Attwood Gear Lube Pump: Automotive : Walmart.com .There are many out there but this one has a screw on attachment that made the fluid transfer a breeze with minimum spill. This one also screws on top of a quart of oil.
~Nylon washers for the three screws that you will be removing
~Oil catch pan
~your tools
First, you have get your personal protection equipment, and choke the wheels of your boat. Then, make sure that it is safe to lower your outdrive. Lower it and make sure that you can loose the TOP CENTER screw in the top of your outdrive. In this picture, you can see that there is another (top left) bolt loose but that is another story). If you are able to loosen it, leave it loose to allow fluid to drain.
Now, proceed to to loose and remove the oil screw plug on the starboard side of your outdrive.
After it drained, replace the nylon washer with a new one and screw it on tight...sorry, I do not have the torque numbers.
You are done with the first stage. Now, locate the MIDDLE screw and that is where OMC Cobras have to be filled in. Not from the bottom screw.
Now, screw the gear pump to the quart of oil/fluid and pump slowly but steady. you will see that minimum air bubbles go in. Don't worry as long as you can fit the two quarts at the end and you check that the oil level is at an acceptable level.
After you have pumped in the two quarts (or most of them). You must tight the top screw BEFORE you disconnect the pump from the outdrive to minimize the oil spill. Trust me, the air lock created by the top screw minimizes the spillage. Then you can disconnect the pump from the middle screw.
Last part, go back to the top screw and check the oil level. Most likely it needs more, so squeeze the left over from the two quarts and pour it in through that opening.
Recheck that all the screws that you loose and remove are tight, let the air bubbles work their way up the top overnight and check the oil level one more time before you start the engine.
Discard the used oil accordingly, clean up all the mess with an environmental mind, and you are done.
Happy boating,
That's it...
After reading so many posts from Iboats regarding how to change the gear oil/fluid in a Cobra OMC outdrive, I decided to get to work and do it in my new (to me) boat. My boat is an 89 Bayliner 1950 Chevy engine.
Let me throw a disclaimer that I am not a certified marine mechanic and that I am not responsible for any damage that may occur to you, your boat and anyone else. This write up is for informational purposes only. Now, disclaimer aside get to work.
~You will need two quarts of gear oil suitable for your boat.
~A manual pump Attwood Gear Lube Pump: Automotive : Walmart.com .There are many out there but this one has a screw on attachment that made the fluid transfer a breeze with minimum spill. This one also screws on top of a quart of oil.
~Nylon washers for the three screws that you will be removing
~Oil catch pan
~your tools
First, you have get your personal protection equipment, and choke the wheels of your boat. Then, make sure that it is safe to lower your outdrive. Lower it and make sure that you can loose the TOP CENTER screw in the top of your outdrive. In this picture, you can see that there is another (top left) bolt loose but that is another story). If you are able to loosen it, leave it loose to allow fluid to drain.
Now, proceed to to loose and remove the oil screw plug on the starboard side of your outdrive.
After it drained, replace the nylon washer with a new one and screw it on tight...sorry, I do not have the torque numbers.
You are done with the first stage. Now, locate the MIDDLE screw and that is where OMC Cobras have to be filled in. Not from the bottom screw.
Now, screw the gear pump to the quart of oil/fluid and pump slowly but steady. you will see that minimum air bubbles go in. Don't worry as long as you can fit the two quarts at the end and you check that the oil level is at an acceptable level.
After you have pumped in the two quarts (or most of them). You must tight the top screw BEFORE you disconnect the pump from the outdrive to minimize the oil spill. Trust me, the air lock created by the top screw minimizes the spillage. Then you can disconnect the pump from the middle screw.
Last part, go back to the top screw and check the oil level. Most likely it needs more, so squeeze the left over from the two quarts and pour it in through that opening.
Recheck that all the screws that you loose and remove are tight, let the air bubbles work their way up the top overnight and check the oil level one more time before you start the engine.
Discard the used oil accordingly, clean up all the mess with an environmental mind, and you are done.
Happy boating,
That's it...
