Husqvarna 136 little end failure.

[H-A]

After my success with a stihl rebuild, thought I would chance my luck and look at a 136 that has been on the shelf for a couple of years.

 

Having taken it apart, I have found it has spat out a needle from the little end, that went through the transfer port and took out the ring. I wondered why it stopped so quickly.

 

I will replace the crankshaft and conrod with a second hand one, also will try out a new "copy part cylinder and piston", have gone for the 40mm for a little more grunt, I hope it lasts better than other ones mentioned on the forum.

 

H-A

[peatff]

I am trying to imagine how a roller can get out of the little end bearing, it's got me baffled. Can you get a picture with the gudgeon pin out and the bearing ?

[MATTMOSS]

Why are you replacing the crank shaft?

[H-A]

There was not much left of the bearing, the outer cage had gone and just the inner was left with a few of the needles missing.

 

The conrod little end is destroyed, this gave room for the bearing to fall apart.

 

The other picture of the conrod shows where one if the needles hit it, squashing it against the side of the cylinder.

 

Waiting for the post man again.

 

H-A

[H-A]

Why are you replacing the crank shaft?

 

Because the conrod is shot, new second hand crank and conrod £16.

 

Hope the bearings on the new crank are good.

 

H-A

[MATTMOSS]

Because the conrod is shot, new second hand crank and conrod £16.

 

Hope the bearings on the new crank are good.

 

H-A

 

Time to log off, im p1i55ed

good luck

[peatff]

That looks pretty messed up. I would have thought there would be more bluing from heat it must have broken up really quickly. Put some extra grease on the new one when you assemble it.

[spudulike]

That looks pretty messed up. I would have thought there would be more bluing from heat it must have broken up really quickly. Put some extra grease on the new one when you assemble it.

 

The little end is lubricated by the oil in the fuel, a little two stroke oil or possibly engine oil may be more suitable on rebuilding than grease IMO

 

Not wishing to pick a fight:001_tt2:

[peatff]

The little end is lubricated by the oil in the fuel, a little two stroke oil or possibly engine oil may be more suitable on rebuilding than grease IMO

 

Not wishing to pick a fight:001_tt2:

 

Just going on scooter manuals, I've rebuilt a few Lambrettas and such and they recommend greasing them for the initial start same as the crank bearings. It works for me. Some I've stripped still have traces of the original grease in evidence after years of use.

Edited September 16, 2013 by peatff

[H-A]

I lubricate engine rebuilds with 2 stroke oil.

 

Now all back together, runs well, I hope the new cylinder and piston last.

 

It looks very nice quality, How can they be made so cheaply?

 

OMC outboards have a special grease for holding the loose needles in place in the big ends, some people use petroleum jelly (Vaseline) as it desolves easily in the petrol oil mix, my main concern with grease is that it may take some time to dissolve.

 

H-A