Yes i was a bit vague on any sort of detail,sorry(novice).I have few mowers with 3.5hp, 4hp and a 5hp engines. all are late seventies early 80's. I see 'vacujet', 'pulsajet' and 'pulsaprime' mentioned quite regularly so i was enquiring about those. Apologies if i'm a pain. Thanks for the ASECC link though!
