Just found your post , My Hayterette is my image photo after it ate a passer by on Halloween last year .
Must admit to them being a great mower but i have got tired of pushing so have just bought a Wolseley 500 self propelled rough cutter today .The engine is knackered but my Hayter Harrier with the roller drive looks like a suitable engine swap for the old Vertical pull Briggs thats fitted .
I do have a Honda 6hp with the side drive but i have it on my 1974 ? LawnBug ride on mover , this cuts upto 6' high nettles easily .Just a pain to load / unload when on my own .
And after many years of using Hayter's the Hayterette gives the most trouble , mainly due to it being at high revs more than a lawn mower is .I find that the extra heat sees me oiling the top shaft 3 or 4 times a season to stop the squeal from the pull start bearings housing .The other Hayters get this done once a year before they are put to work .