evinrude crank shaft bearings

[Frank mellin]

Thanks to all the advice from this forum I have now located and fitted a new impeller to my outboard,
The bad news is that although the engine now runs fine it is rather noisy and I think the noise is coming from the top bearing on the crankshaft.
Is there a way to replace this bearing without stripping the entire block?

 

[madabouttheboat]

In short, I suspect not. You have to take the crank out to change the bearing in my experience.

 

[Frank mellin]

In short, I suspect not. You have to take the crank out to change the bearing in my experience.

I have just looked at whats involved in changing the crankshaft bearings !
Is there anyone out there who is familiar with this engine and would be prepared to do the job?
I live in suffolk but would be prepared to travel .
(Local companies are just not interested in working on old engines only selling new ones.)

 

[Frank mellin]

Forgot to say engine is evinrude work twin 14hp. Is same as 10hp model.

 

[madabouttheboat]

I have just looked at whats involved in changing the crankshaft bearings !
Is there anyone out there who is familiar with this engine and would be prepared to do the job?
I live in suffolk but would be prepared to travel .
(Local companies are just not interested in working on old engines only selling new ones.)

it's not a hugely difficult job, but the problem with an old engine is that the bolts don't always come undone, and often snap off. This turns a relatively easy job into something all-together more complicated. I suspect the problem will be that the cost of the job will be more than the outboard is worth simply due to number of hours the job could turn into.

 

[Frank mellin]

Yes I guess you are right.
Its not splitting the crankcase that phases me but removal of all the ancilliaries looks to be a nightmare.
I trained as a car mechanic many years ago so am fairly used to dealing with problem bolts etc but am getting a bit too old for all the "attachments" these days.
Maybe I should bite the bullet and look for another engine thats ready to go.
I only need it as a backup for the 50hp diesel engine that I have in my 28ft boat.
In a car if you breakdown you just stop by the roadside but with a boat a failed engine can put one in serious difficulty especially on a busy river or coastal passage.

 

[James_Calvert]

Had a 4hp Evinrude making a horrible noise, local dealer said it might be the crankshaft bearings.

So I stripped it right down. Nothing wrong with the bearings, even managed to put the same number of needle rollers back as had come out...

Concluded it was the ancillaries banging against the flywheel making the noise, something related to the solid state ignition system.

Anyway, with these properly tightened up the noise was gone.

Just a little story to remind you to check the easier stuff before you dive in. The guy who misdiagnosed mine was a proper outboard mechanic as well.

 

[Frank mellin]

Had a 4hp Evinrude making a horrible noise, local dealer said it might be the crankshaft bearings.

So I stripped it right down. Nothing wrong with the bearings, even managed to put the same number of needle rollers back as had come out...

Concluded it was the ancillaries banging against the flywheel making the noise, something related to the solid state ignition system.

Anyway, with these properly tightened up the noise was gone.

Just a little story to remind you to check the easier stuff before you dive in. The guy who misdiagnosed mine was a proper outboard mechanic as well.

thanks for that info.
The noise does sound more like something scraping against the flywheel so I will definitely check that before I start selling the big issue!

 

[Caraway]

With an old motor you have nothing much to lose. But don't start spending on it. There is a point at which it makkes more sense to find another that runs well and buy that.

 

[Frank mellin]

With an old motor you have nothing much to lose. But don't start spending on it. There is a point at which it makkes more sense to find another that runs well and buy that.

only the £400 I paid for it from a dealer in the midlands about 3 months ago!Who assured me it only needed servicing!
Thing is as I said previously I only need as standby for my boat.
Is it possible to get something around that figure (needs to be at least 15hp)
Anyone out there have an honest one for sale?

 

[Caraway]

Hmm. That is a bit of a consideration. But "good money after bad". Don't be lininig anyone else's pocket.

 

[Frank mellin]

thanks for that info.
The noise does sound more like something scraping against the flywheel so I will definitely check that before I start selling the big issue!

 

[Frank mellin]

have checked under the flywheel and couldnt find anything loose.
so i guess the only other source of noise must be the bearings?

 

[penfold]

Given it's a new-to-you engine how do you know that the noise isn't normal?

 

[Frank mellin]

Thats a good point, maybe I am being too fussy over a 38 year old engine!!
I guess I am trying to compare it with the modern day engines which are much quieter.

 

[penfold]

I don't know about this particular one, but older OMC whisks have metal cowlings which serve to amplify rather than reduce the din.

 

[Rappey]

I got rid of an early evinrude e-etc 90 because it was on an aluminium boat which acted as a loudspeaker. A shame as compared to the mariner 90 2 stroke it was going to replace it felt like 120 hp , 6 knts extra top speed and much quicker acceleration.

 

[Davy_S]

Many years ago our old evinrude 65hp 3 cylinder engine put a piston through the crankcase, i stripped the engine down, got the crankcase welded up at a Rochdale company and bought a new piston, the con rod big ends are drilled to size then split so they leave a broken jagged edge, each one will only fit one con rod, mix them up and you are knackered, plus i had needle rollers all over the front room, we got the engine back running and traded it in, my advice, sell it on ebay and buy another engine, it is not worth the work involved, and if you have to pay someone else to do it, you will get your pants pulled down, get rid quick!

 

[gordmac]

Why not just use it and see if the noise gets worse?