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Old 28 June 2011, 12:58   #1
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Yamaha 60hp Lower Unit Overhaul...Help

I am in the process of overhauling the lower unit on my Yamaha 60hp and have come to a halt.

The water pump, impellor etc all came apart without a problem

The prop shaft is and gear box is not.

The first large outer ring came off reasonably easily using a punch and hammer to tap it around. The next inner component, large threaded Shaft carrier will not budge.

I have tried Heat (plenty of heat) and long soaking from hot in Plus Gas then tried Hammer & punch, Large lever and lots of brute force but it won't shift at all.

sorry if wrong terms for parts used

Any suggestions would be welcomed.


Thanks

Paul
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Old 28 June 2011, 15:28   #2
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Now this was about five years ago, I had a split appear on my in the side of the gear housing of my 1990 90 hp Yam. I had to strip it and weld it.

I did the same as you removed the pump.
Removed the large alloy ring (buy a new one as the are always corroded)
Now the next bit is too pull the bearing carrier out which is not obvious. DONT PULL ON THE PROP SHAFT. I made up some puller leg to go on my Halford two legged gear pullers. The legs of the puller locate on the two webs of the bearing carrier nonce rotated into place and the pressure was applied to the prop shaft by the nut on the puller. Apply some heat around the gear housing not too much do not burn the paint. The carrier should come out leaving the shaft in place.

To remove the shaft you will need to get a spanner 17mm If I remember correctly onto the pinion gear which is at the bottom of the driveshaft(Engine to gearbox shaft, hold the middle of the shaft in a vice be careful not to damage any machined faces. ) once this is removed take the gear off and the rest is straight forward.

Hopefully this will help.

Good luck,

Paul
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Old 28 June 2011, 15:45   #3
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Thanks

When you say it's not obvious do you mean it looks as if the threads for the licking ring continue down and the bearing carriers is screwed into place?
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Old 28 June 2011, 15:45   #4
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Calm down Wilk

I meant Locking Ring alright!!!!!
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Old 28 June 2011, 18:13   #5
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The thread only goes as deep as the licking / locking ring.

don't try rotating the bearing carrier you need to pull it out.
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Old 28 June 2011, 18:23   #6
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Would you like to send you a work shop manual on a discs? If so message me a postal address and I stick one in the post for you.
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Old 29 June 2011, 00:45   #7
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PM sent
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Old 29 June 2011, 15:26   #8
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I have burnt off a workshop manual and a full parts catalogue. I will put it in the post tomorrow.
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Old 30 June 2011, 03:30   #9
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Thanks

Thanks for your help.

Once I am back on the water I will be down to Christchurch (My mate has a Hut at Mudeford) I might see you on the water?


Cheers

Paul
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