Oil level and impeller replacement on Johnson 25

[Iwan Lane]

Please help.
How do I check

Please help.
How do I check that there is sufficient oil in the lower unit?
Access to impeller.
I have read some of Joe's instructions on how to drop the lower unit off larger outboards. Would I expect similar on this fella?
Any advice will be much appreciated.
Thank you.

 

[rick]

" If you need to check your oi

" If you need to check your oil level, you probably need to change it. Remove the upper vent screw and the lower drain screw. After lube is finished draining, refill from the bottom. This pushes the air out the top hole. When oil appears from the top hole, replace the bottom screw, then the top. Be carefull not to loose too much oil. The only way to check the level is to top it off, again, adding lube to the bottom hole until it appears out the top. Note the condition of the old oil when draining. Look for milky discoloration (Water)and also for metalic condition which would indicate a faulty condition with a gear or bearing. If either of these conditions are present, you should have it inspected further to determine if repairs are needed. This will save you money in the long run.
Good luck. "

 

[sparky]

There may be a plate on the s

There may be a plate on the side of the exhaust housing. This will give access to the shift linkage. Remove the bolts and drop the lower unit. The water pump will present itself.Fill a lower unit from the bottom till oil comes out the top screw hole. Above all replace that impeller. It is the most neglected part of motors and results in the largest repair bills.

 

[sparky]

POst the model # to get more

POst the model # to get more specific details on lower unit removal.

 

[jdkline]

" I think it will be easier th

" I think it will be easier than the larger outboards you have heard Joe discuss. They have a shift rod that goes all the way up to teh block and is difficult to access without moving the carbs. The small OMCs have two shift rods and connect with a brass screw and a coupling. You put the engine into forward and loosen the screw on the coupling. The only trick is aligning the indentation on the shift rod just perfectly into the coupling. If the alignment is not exactly right, the screw will not go in. You may access the linkage by removing a plate on the leg of the motor as Sapky was saying or it might be that you have a series of bolts around the anti venilation plate just above the prop that you loosen. In this case, the linkage will present itself when you shift into forward. When you replace the lower unit make sure the notch in the shift rod is aligned exactly in the hole in the coupler, insert and tighten the screw and rotate the flywheel in a clockwise manner until the driveshaft splines engage the splines on teh propshaft. at this point, you will be able to bump the engine back into neutral and reattach the lower unit. The water pump replacement is easy. Working with someone who's done this before or at least having a shop manual makes it a whole lot quicker and easier the first time. After that, should be no problem. "