Changing Gears on a 60HP 3 cylinder Mercury

[Garnett-Devon]

Hi - the gears in my Mercury are in a pretty poor state. I bought an old gearbox with a broken Skeg to do a transplant!

Getting the shaft and pinion out was a pain. After removing the water pump I ended up having to chisel out the plastic water seal until I reached the bearing lock but. I don't want to be as brutal when I remove the pinion and shaft on the gearbox that I am keeping! Is there a way to do it or do I just order new seals and assume that I will be forcing entry again?

Any advice appreciated

Thanks

Garnett

 

[jimmbo]

I suggest a Mercury factory service manual. It will have the necessary info on disassembly, reassembly, as well as the info regarding shimming, backlash, pinion depth adjustments.

 

[Faztbullet]

You will have to reshim as these are not swap /drop in parts.....

 

[Garnett-Devon]

Thanks - I have the service manual and there is no mention of shims. There weren't any when I took the unit apart and none on the parts list. Mercury in the U.K. know nothing about them. The pinion on my unit floats on a spline. They have supplied me with a service kit for the seals. Any more information would be appropriate. Thanks

 

[racerone]

Are you saying there is no nut on the bottom of the driveshaft to hold the pinion in place ?------serial # is ??----Hard / not hard to believe that some clerk would tell you that there is no shimming involved !!

 

[Garnett-Devon]

Hi - sounds like we have some clarity! No there is no lock but on the pinion m. It sits on a spline and floats in and out as required. Further up the shaft is a bearing that is held in place by a castle but. An oil seal sits above this then the plastic base of the water pump. I did notice that there are three different types in the parts list. The other 2 don't have a castle but so I guess these are the shim type?

 

[Garnett-Devon]

Serial number 09993522 1999 60 ELRT

 

[Faztbullet]

if this is your housing # 8 is the nut

 

[Garnett-Devon]

No Title

Hi

No - I found this one but it is not mine. This was the one I have.

 

[Garnett-Devon]

12 is the nut on mine. The pinion floats up and down on the spline

 

[racerone]

Then why does it need the nut if it floats up and down??

 

[Faztbullet]

I have resealed several of these units and pinion does not float..it is tighted solid to driveshaft

 

[Faztbullet]

# 19 is the shim/s under upside down bearing and that a bigfoot unit. The pinion does not float on shaft as its tightend snug to driveshaft. Maybe you mean the whole driveshaft assy move up /down as these gears do push apart and preload upper bearing. You still will need shimming as the housings are not machined the same.

 

[Garnett-Devon]

Hi All - This is making more sense now. My diner unit wasn't shimmed but the one I am repairing is. While striping my unit it looks like there is damage to the gear selector from the broken gear. I want to take the selector from my donor box and put it in mine. I have the service manual but I can't see how to release the gear selector shaft. Any advice appreciated Thanks