We have information on the 1458 model which is a 4/stroke motor but I am unable to locate the 1454 model you are talking about. Can you post a picture of the mower so I can look at it.
I also have parts list an manuals for the 2 stroke motors (villiers).
Regards,
Bruce
Please do not PM me asking for support. Post on the forums as it helps all members not just the individual.