Search youtube for victa repair, some good advice on there from a guy geoff390
Due to poor design a powertorque would be lucky to push 5hp, really it is just meant to spin a blade at 3600rpm. A 25mm mikuni carby and some other work can really wake the old victa motors up though.
I would be checking for a partially blocked jet or needle if you need to keep priming it to run,
The $15 contributes toward the upkeep of this forum, manuals are only there for people who wish to contribute.
Wow that was my 500th post...