Can you upload a picture to the board as I am unable to locate model 509 as Victa numbers usually start with V Code and if it was made around 1963 you have few Utility models which are V11 through to V22 some of these are 4/Stroke. You will still be able to get most parts for these models.
Regards,
Bruce
Please do not PM me asking for support. Post on the forums as it helps all members not just the individual.