Seized on prop. Any ideas?

[sparkie]

Hi all, due to operator error the prop on my little Yamaha 2hp was replaced without the shaft being greased, and it has now completely seized/corroded onto the shaft. I've tried penetrating oil, some mild brutality, and speaking nicely to it but all to no avail. Reluctant to use a lot of heat because of the rubber seals in the gearbox and the paint, which is still good.. Any other suggestions?

 

[RichardS]

Hi all, due to operator error the prop on my little Yamaha 2hp was replaced without the shaft being greased, and it has now completely seized/corroded onto the shaft. I've tried penetrating oil, some mild brutality, and speaking nicely to it but all to no avail. Reluctant to use a lot of heat because of the rubber seals in the gearbox and the paint, which is still good.. Any other suggestions?

Try a good stream of boiling water before resorting to force, with a puller if possible. It won't damage the seals but might just be enough especially if you can exert a shock load with a rubber mallet or similar.

Richard

 

[sparkie]

Boiling water on the cold prop- mmm, possibility. My gear puller won't fit but might be able to conjure up something. Thanks. Give that some thought. Cheers!

 

[Stemar]

For the prop on Jissel, I made a puller from a couple of bits of 3/4 ply, one with a cutout to go behind the prop and 3 bits of threaded rod, plus a few nuts. It worked.

 

[skipper681]

I don't have an outboard but I have worked on them, WD40 and don't worry about the rubber seals, they are replacable and probably a good idea to do so anyway, then you'll replace the the gearbox oil too, all good. My advice is just my opinion.

Give a call to Martin, he will steer you right, Stitt Marine - Agents for Mercury, Mercruiser, Tohatsu and Yanmar. 028 9338 2278

He's a knowlegable chap, there's nothing about outboards that he dosen't know.

Skip

 

[Thistle]

Tighten a puller onto it and then give it a "sharp tap". If that doesn't work, tighten the puller further and make the tap sharper and harder. Repeat.

 

[PabloPicasso]

Boiling water would be a good idea. Certainly it's unlikely to cause harm

 

[goeasy123]

Angle grinder + new prop.

If it's the 2CV Yam I think you have pattern props are dirt cheap and good quality. Try AliExpress.

 

[sparkie]

Thanks for all the good advice chaps. Plenty to go at there. Cheers!

PS it's a 2C Yamaha.

 

[sparkie]

Forgot to say, one of my friends suggested soaking the whole thing in Coca-Cola overnight. Sounds crazy but I know it cleans copper and the like??

 

[Daydream believer]

You can always rent a puller. infact take the outboard to the hire shop & do it there & they may only charge a nominal fee

 

[sparkie]

Yes good thinking. The only prob with a standard three leg puller is that the prop is not open-ended but has a boss with the pin through it, so nothing to pull against as it were, however I'm sure I can come up with something if I put my mind to it. Got 'til Easter to sort it out.....

 

[AndrewB]

Forgot to say, one of my friends suggested soaking the whole thing in Coca-Cola overnight. Sounds crazy but I know it cleans copper and the like??

Coca-Cola contains very dilute phosphoric acid, which works both with rust and aluminium oxide. Some say alternate it with vinegar. I once used this successfully to release a key that had corroded into its lock. The liquid from boiled rhubarb leaves (oxalic acid) is another folk remedy. But commercial rust-eaters use a much stronger concentration of acid, so have to be preferable if you want to try this.

 

[coopec]

When I was working on my car many years ago I coulndn't remove a tapered shaft. I tried everything but happened to mention it to my Caterpillar Diesel Fitter Brother-in-Law and he said to use a heavy 3kg hammer as an anvil and give it a hell of a welt with a 3kg hammer on the other side. It worked first time!!

I can only assume the metal gets temporarily deformed and squeezes the tapered shaft out like an orange pip between your fingers.

 

[XDC]

Start the engine in the deepest murkiest water you can find. The propeller will fall off immediately

 

[Daydream believer]

Is there room at the back to get tapered washers on?
tapered washer example
Cut a slot in the thin side & drive 2 or more ( depending on gap) together to expand & push the prop off

If it was my propeller, I would probably get a cold steel chisel or bolster & cut a slot in it with an angle grinder to fit over the shaft & drive that in the back. Provided it was not going to damage the housing behind it, of course.

 

[vyv_cox]

When I was working on my car many years ago I coulndn't remove a tapered shaft. I tried everything but happened to mention it to my Caterpillar Diesel Fitter Brother-in-Law and he said to use a heavy 3kg hammer as an anvil and give it a hell of a welt with a 3kg hammer on the other side. It worked first time!!

I can only assume the metal gets temporarily deformed and squeezes the tapered shaft out like an orange pip between your fingers.

I watch Wheeler Dealers on Quest TV quite regularly. The mechanical expert fixes up old cars that the other one buys. I have been surprised to see that he always separates steering joints that way. There are many patent tools for doing this job and I own a couple of them, but two hammers works fine every time.