Another big cc saw nice.
Not just any large cc chainsaw, the virtual Holy Grail of Jonsereds.
Hey Dean.....don't even risk running it if you think it has old crank seals....you loose a seal, the mixture gets lean and you roast an unobtainium piston/jug. I can't tell you how many people I know in the last two yrs that have done just that with rare/expensive big cc, older saws.
Kevin