G'day SR,
Hi Gadge,
Thanks, that helps a lot.
Think I can get hold of a new piston and rings fairly easy but the gasket was illuding me so good to know I can use a powertorque one.
Took the piston off as picture and gave it a bit of a clean but presume that this is too far gone?
Yup, that one's 'had the Richard'. The Powertorque piston kits fit the earlier full-crank motors like yours, but
not vice versa.
Bit confused what the shim is and why it's there, was underneath one of the rings. Is this normal?
Yes; it's an 'expander ring'; which is no longer used, due to improvements in piston ring technology since the 1970s.
Problem seems to have been at least partially caused by coking round the exhaust port.
Now looking at honing tools, and excuse to buy new tools.
What kind of grit do you use and presume it just needs a light going over to avoid oversizing it.
If you can find a local motorcycle workshop, chances are they'll have [or can refer you to someone who does] a suitable cylinder hone for this job. Good hones aren't cheap!
Also, what size are the engine nuts? Might as well take the engine off the body, will be easier and can give it a good clean.
These nuts are [as are all on that mower] Imperial AF/SAE system fractional inch sizes.
Made some progress today, cleaned up head and cylinder ready to reassemble.
An impact gun would have been nice but working with limited set of tools although this has now expanded to some long angled needle nose pliers!
For sure; but none of this advanced technology was available, back in the early days of Victa mowers.
