Husqvarna 550 mark 1

[Dan 31]

20 minutes ago, adw said:

Seen plenty like that, this was why they added an additional screw to clamp the crankcase tighter in that area, if the saw is a good runner yes it’s worth doing, split the crankcase and fit a new gasket, as a belt and braces repair also use some instant gasket either side of the new gasket, it would probably be worth replacing the main bearings as it’s apart, pretty sure we can advise you as you go if you choose to repair it.

What tool would I need to spilt the crankcase 

[Dan 31]

Just now, Dan 31 said:

What tool would I need to spilt the crankcase 

Also what do you mean belt and brace 

[adw]

There is a dedicated tool, but is pretty expensive, you cab strip off all the components and use a small blow torch to heat and expand the crankcase.

[Stubby]

6 minutes ago, Dan 31 said:

Also what do you mean belt and brace 

He means a new gasket but some Hylomar or similar in addition .

[adw]

5 minutes ago, Dan 31 said:

Also what do you mean belt and brace 

Sorry that is an age thing, so it means taking extra precautions to make it seal.

[Mick Dempsey]

Just as an aside, I ran a couple of MK1s.

Had one rebuilt when it let go (piston rings iirc)

One month later it went again, cost me nearly half the price of a new one.

[Dan 31]

7 minutes ago, adw said:

There is a dedicated tool, but is pretty expensive, you cab strip off all the components and use a small blow torch to heat and expand the crankcase.

Ok thank you 

[Dan 31]

2 minutes ago, Stubby said:

He means a new gasket but some Hylomar or similar in addition .

👍 cheers 

[Stubby]

1 minute ago, Dan 31 said:

👍 cheers 

Its a tricky one to assess / weigh up . If you feel confidant to do the repair , split the cases etc etc then yes . However it was a weakness in the MK 1 and could happen again despite your repair . The Mk 2 is a way better saw than the Mk1 . So .... Ho hum what do you do ?

[Dan 31]

2 minutes ago, Mick Dempsey said:

Just as an aside, I ran a couple of MK1s.

Had one rebuilt when it let go (piston rings iirc)

One month later it went again, cost me nearly half the price of a new one.

Tbh this is what I’m worried on