1998 mercury 125 elpto lower unit

[mtn0583]

I need a new lower unit gear case for my 1998 mercury 125 elpto outboard. I have found a lower gear case from a 2001 exlpto 125. Will it be compatible with my elpto?

 

[racerone]

Verify that the driveshaft is the correct length.

 

[mtn0583]

Thanks racerone. Im looking at just the gear case alone all the gears and parts in my gear case are good. I just don't know if the gear cases are the same.

 

[Faztbullet]

Housings will interchange but you will need to reshim the foward and pinion as you cannot just swap the guts over.....

 

[mtn0583]

Thanks faztbullet. I'll go ahead and purchase that lower gear case then. Now I'll start looking into what you mean by "reshim the forward and pinion." I love learning how these outboards work.

 

[racerone]

The gears are put in the proper position using shims.------This gets you the proper fit and proper " tooth contact " and also the proper " backlash " for long gear life.-----------Perhaps it is best to consult your local dealer to do this procedure as special tools may be required.-----------If you get this wrong you may end up spending more big coins.

 

[mtn0583]

Does reshiming need to be done if I get a gear case from a motor of the same model? Or is that step only if I get the different models gear case

 

[racerone]

Sorry , this is not the same as installing sparkplugs into a motor.--Each gear housing is slightly different depending on supplier / manufacturing date.--Gears must be put in the proper position using shims.----Run to a shop and ask if they can do this for you !!!!!